AOC U27G4R Gaming Monitor User Manual

Ensure the monitor is connected to the correct power source as
indicated on the label. Use a grounded power outlet and avoid
overloading power strips. Unplug during lightning storms or long
periods of non-use.

Installation

Place the monitor on a stable surface recommended by the
manufacturer. Avoid pushing objects into monitor slots, spilling
liquids, or placing the monitor on the floor. Maintain proper air
circulation around the monitor to prevent overheating.

If wall-mounting, use an approved mounting kit and ensure the
monitor does not tilt downward more than -5 degrees to prevent
damage not covered under warranty.

Cleaning

Regularly clean the monitor cabinet with a water-dampened soft
cloth. Ensure the cloth is almost dry and disconnect the power cord
before cleaning to prevent damage.

Other

If the monitor emits strange smells, sounds, or smoke,
disconnect the power plug immediately and contact a Service Center
for assistance.

Setup

Contents in Box:

Monitor

Quick Start Guide
Warranty Card

Stand with Base
Power Cable, HDMI Cable, DisplayPort Cable, USB Cable

FAQ

Q: What should I do if the monitor falls?

A: If the monitor falls, it can cause serious damage. Contact
the manufacturer for guidance on inspection and possible
repairs.

Q: Can I use any power source for the monitor?

A: No, only operate the monitor from the specified power source
mentioned on the label to prevent damage or safety hazards.

“`

View Fullscreen

Safety ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………1 National Conventions……………………………………………………………………………………………………………………………………………………………………………………1 Power…………………………………………………………………………………………………………………………………………………………………………………………………………………….2 Installation………………………………………………………………………………………………………………………………………………………………………………………………………….3 Cleaning ………………………………………………………………………………………………………………………………………………………………………………………………………………4 Other……………………………………………………………………………………………………………………………………………………………………………………………………………………. 5
Setup………………………………………………………………………………………………………………………………………………………………………………………………………………………………….. 6 Contents in Box……………………………………………………………………………………………………………………………………………………………………………………………… 6 Set-up Stand & Base…………………………………………………………………………………………………………………………………………………………………………………….7 Adjusting Viewing Angle………………………………………………………………………………………………………………………………………………………………………….. 8 Connecting the Monitor…………………………………………………………………………………………………………………………………………………………………………… 9 Wall Mounting ……………………………………………………………………………………………………………………………………………………………………………………………… 10 Adaptive-Sync function……………………………………………………………………………………………………………………………………………………………………………..11 HDR ……………………………………………………………………………………………………………………………………………………………………………………………………………………..12
Adjusting………………………………………………………………………………………………………………………………………………………………………………………………………………………….13 Hotkeys ………………………………………………………………………………………………………………………………………………………………………………………………………………13 OSD Setting …………………………………………………………………………………………………………………………………………………………………………………………………….14 Game Setting …………………………………………………………………………………………………………………………………………………………………………………..15 Picture ………………………………………………………………………………………………………………………………………………………………………………………………….17 PIP/PBP……………………………………………………………………………………………………………………………………………………………………………………………… 20 Settings……………………………………………………………………………………………………………………………………………………………………………………………….22 Audio ……………………………………………………………………………………………………………………………………………………………………………………………………23 OSD Setup ………………………………………………………………………………………………………………………………………………………………………………………..24 Information …………………………………………………………………………………………………………………………………………………………………………………….. 25 LED Indicator ……………………………………………………………………………………………………………………………………………………………………………………………….. 26
Troubleshoot…………………………………………………………………………………………………………………………………………………………………………………………………………………27 Specification……………………………………………………………………………………………………………………………………………………………………………………………………………….. 28
General Specification………………………………………………………………………………………………………………………………………………………………………………. 28 AOC Monitors Panel Pixel Defect Policy ……………………………………………………………………………………………………………………………………….30 Preset Display Modes………………………………………………………………………………………………………………………………………………………………………………..32 Pin Assignments ………………………………………………………………………………………………………………………………………………………………………………………….33 Plug and Play …………………………………………………………………………………………………………………………………………………………………………………………………34
i

Safety
National Conventions
The following subsections describe national conventions used in this document. Notes, Cautions, and Warnings Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or in italic type. These blocks are notes, cautions, and warnings, and they are used as follows: NOTE: A NOTE indicates important information that helps you make better use of your computer system. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates the potential for bodily harm and tells you how to avoid the problem. Some warnings may appear in alternate formats and may be unaccompanied by an icon. In such cases, the specific presentation of the warning is mandated by regulatory authority.
1

Power
The monitor should be operated only from the type of power source indicated on the label. If you are not sure of the type of power supplied to your home, consult your dealer or local power company.
The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug, have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of the grounded plug.
Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the monitor from damage due to power surges.
Do not overload power strips and extension cords. Overloading can result in fire or electric shock. To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured receptacles marked between 100-240V AC, Min. 5A. The wall socket shall be installed near the equipment and shall be easily accessible.
2

Installation
Do not place the monitor on an unstable cart, stand, tripod, bracket, or table. If the monitor falls, it can injure a person and cause serious damage to this product. Use only a cart, stand, tripod, bracket, or table recommended by the manufacturer or sold with this product. Follow the manufacturer’s instructions when installing the product and use mounting accessories recommended by the manufacturer. A product and cart combination should be moved with care.
Never push any object into the slot on the monitor cabinet. It could damage circuit parts causing a fire or electric shock. Never spill liquids on the monitor.
Do not place the front of the product on the floor.

If you mount the monitor on a wall or shelf, use a mounting kit approved by the manufacturer and follow the kit instructions.
Leave some space around the monitor as shown below. Otherwise, air-circulation may be inadequate hence overheating may cause a fire or damage to the monitor.
To avoid potential damage, for example the panel peeling from the bezel, ensure that the monitor does not tilt downward by more than -5 degrees. If the -5 degree downward tilt angle maximum is exceeded, the monitor damage will not be covered under warranty.
See below the recommended ventilation areas around the monitor when the monitor is installed on the wall or on the stand:

Installed with stand

12 inches 30cm

4 inches 10cm

4 inches 10cm
Leave at least this much space around the set

4 inches 10cm

Cleaning
Clean the cabinet regularly with a water-dampened, soft cloth. When cleaning use a soft cotton or microfiber cloth. The cloth should be damp and almost dry, do not allow liquid into the case. Please disconnect the power cord before cleaning the product.
4

Other
If the product is emitting a strange smell, sound or smoke, disconnect the power plug IMMEDIATELY and contact a Service Center.
Make sure that the ventilating openings are not blocked by a table or curtain. Do not engage the LCD monitor in severe vibration or high impact conditions during operation. Do not knock or drop the monitor during operation or transportation. The power cords shall be safety approved. For Germany, it shall be H03VV-F, 3G, 0.75 mm2, or better. For other countries, the suitable types shall be used accordingly. Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the equalizer to maximum increases the earphones and headphones output voltage and therefore the sound pressure level.
5

Setup
Contents in Box

Monitor
*

Quick Start Guide

Warranty Card

Stand

Base
*

Power Cable

HDMI Cable

DisplayPort Cable

USB Cable

Not all signal cables will be provided for all countries and regions. Please check with the local dealer or AOC branch office for confirmation.

Set-up Stand & Base
Please setup or remove the base following the steps as below. Setup:
Remove:
1 3
2
NOTE: Display design may differ from those illustrated.
7

Adjusting Viewing Angle
To achieve the best viewing experience, it is recommended that the user can make sure they are able to look at their whole face on the screen, then adjust the monitor’s angle based on personal preference. Hold the stand so you will not topple the monitor when you change the monitor’s angle. You are able to adjust the monitor as below:
23

130mm

90°

NOTE: Do not touch the LCD screen when you change the angle. Touching the LCD screen may cause damage.
Warning · To avoid potential screen damage, such as panel peeling, ensure that the monitor does not tilt downward
by more than -5 degrees. · Do not press the screen while adjusting the angle of the monitor. Grasp only the bezel.

Connecting the Monitor
Cable Connections In Back of Monitor and Computer:
1 2
3

4 5

67 89

1. USB3.2 Gen2 downstream 2. USB3.2 Gen2 downstream 3. USB3.2 Gen2 downstream 4. USB3.2 Gen2 downstream+charging 5. USB upstream 6. HDMI 1 7. HDMI 2 8. DisplayPort 9. Earphone 10. Power

Connect to PC
1. Connect the power cord to the back of the display firmly. 2. Turn off your computer and unplug its power cable. 3. Connect the display signal cable to the video connector on the back of your computer. 4. Plug the power cord of your computer and your display into a nearby outlet. 5. Turn on your computer and display. If your monitor displays an image, installation is complete. If it does not display an image, please refer to Troubleshoot.
To protect equipment, always turn off the PC and LCD monitor before connecting.

Wall Mounting
Preparing to Install An Optional Wall Mounting Arm.
1
3 2

This monitor can be attached to a wall mounting arm you purchase separately. Disconnect power before this procedure. Follow these steps:
1. Remove the base. 2. Follow the manufacturer’s instructions to assemble the wall mounting arm. 3. Place the wall mounting arm onto the back of the monitor. Line up the holes of the arm with the holes in
the back of the monitor. 4. Insert the 4 screws into the holes and tighten. 5. Reconnect the cables. Refer to the user’s manual that came with the optional wall mounting arm for
instructions on attaching it to the wall.

100mm

Specification of wall hanger screws: M4*(10+X)mm (X=Thickness of Wall mount bracket) M=4.0Max

D3.86-3.96

Dk=8.0

H=2.0

M4-P0.7 L=10+X

Note: VESA mounting screw holes are not available for all models, please check with the dealer or official department of AOC. Always contact manufacturer for wall-mount installation.

* Display design may differ from those illustrated.
WARNING: 1. To avoid potential screen damage, such as panel peeling, ensure that the monitor does not tilt downward
by more than -5 degrees. 2. Do not press the screen while adjusting the angle of the monitor. Grasp only the bezel.
10

Adaptive-Sync function
1. Adaptive-Sync function works with DisplayPort/HDMI 2. Compatible Graphics Card: Recommended list is as below, also could be checked by visiting www.AMD.
com Graphics Cards
· RadeonTM RX Vega series · RadeonTM RX 500 series · RadeonTM RX 400 series · RadeonTM R9/R7 300 series (R9 370/X, R7 370/X, R7 265 except) · RadeonTM Pro Duo (2016) · RadeonTM R9 Nano series · RadeonTM R9 Fury series · RadeonTM R9/R7 200 series (R9 270/X, R9 280/X except) Processors
· AMD RyzenTM 7 2700U · AMD RyzenTM 5 2500U · AMD RyzenTM 5 2400G · AMD RyzenTM 3 2300U · AMD RyzenTM 3 2200G · AMD PRO A12-9800 · AMD PRO A12-9800E · AMD PRO A10-9700 · AMD PRO A10-9700E · AMD PRO A8-9600 · AMD PRO A6-9500 · AMD PRO A6-9500E · AMD PRO A12-8870 · AMD PRO A12-8870E · AMD PRO A10-8770 · AMD PRO A10-8770E · AMD PRO A10-8750B · AMD PRO A8-8650B · AMD PRO A6-8570 · AMD PRO A6-8570E · AMD PRO A4-8350B · AMD A10-7890K · AMD A10-7870K · AMD A10-7850K · AMD A10-7800 · AMD A10-7700K · AMD A8-7670K · AMD A8-7650K · AMD A8-7600 · AMD A6-7400K
11

HDR
It is compatible with input signals in HDR10 format. The display may automatically activate the HDR function if the player and content are compatible. Please contact the device manufacturer and the content provider for information on the compatibility of your device and content. Please select “OFF” for the HDR function when you have no need for automatical activation function. Note: 1. No special setting is needed for the DisplayPort/HDMI interface in WIN10 versions lower (older) than V1703. 2. Only the HDMI interface is available and the DisplayPort interface cannot function in WIN10 version V1703. 3. Display Setting a. The display resolution is set to 3840*2160, and HDR is preset to ON. b. After entering an application, the best HDR effect can be achieved when the resolution is changed to
3840*2160 (if available).
12

Adjusting
Hotkeys
1 234 5
1 Source/Exit 2 Dual Resolution 3 Dial Point 4 Menu/Enter 5 Power Menu/Enter Press to display the OSD or confirm the selection. Power Press the Power button to turn on the monitor. Dial Point When there is no OSD, press Dial Point button to show / hide Dial Point. Dual Resolution When there is no OSD, press ” ” key to open Dual Resolution function, then press ” ” or ” ” key to select Dual Resolution mode (UHD 120Hz, UHD 160Hz, FHD 320Hz) based on different Max. Refresh rate types. Source/Exit When the OSD is closed, press Source/Exit button will be Source hot key function. When the OSD menu is active, this button acts as an exit key (to exit the OSD menu).
13

OSD Setting
Basic and simple instruction on the control keys.

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

Dual Resolution Gaming Mode Shadow Control Low Input Lag
Game Color Adaptive-Sync
Dial Point Sniper Scope

BRIGHTNESS 70

INPUT SOURCE DP

1). Press the MENU-button to activate the OSD window.

2). Press or to navigate through the functions. Once the desired function is highlighted, press the MENU-button / OK to activate it, press or to navigate through the sub-menu functions. Once the desired sub-menu function is highlighted, press MENU-button / OK to activate it.

3). Press or to change the settings of the selected function. Press / any other function, repeat steps 2-3.

to exit. If you want to adjust

4). OSD Lock Function: To lock the OSD, press and hold the MENU-button while the monitor is off and then press power button to turn the monitor on. To unlock the OSD – press and hold the MENUbutton while the monitor is off and then press power button to turn the monitor on.

Notes:

1). If the product has only one signal input, the item of “Input Select” is unable to be adjusted.
2). If the input signal resolution is the native resolution or Adaptive-Sync, then the item “Image Ratio” is invalid.

Game Setting

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

Dual Resolution Gaming Mode Shadow Control Low Input Lag
Game Color Adaptive-Sync
Dial Point Sniper Scope

BRIGHTNESS 70

INPUT SOURCE DP

Dual Resolution

UHD 120Hz / UHD 160Hz / FHD 320Hz
Standard

FPS

RTS

Gaming Mode Racing

Gamer 1

Gamer 2

Gamer 3

Shadow Control

0 ~ 20

Low Input Lag Off / On

Game Color

0 ~ 20

Adaptive-Sync Off / On

Dial Point Sniper Scope

Off / On / Dynamic
Off / 1.0 / 1.5 / 2.0

MBR

0 ~ 20

Selected Dual Resolution mode.
Enhance readability for suitable web and mobile games.
For playing FPS (first Person Shooters) games. Improves black level in dark theme. For playing RTS (Real Time Strategy) games. Improves the image quality. For playing Racing games, Provides fastest response time and high color saturation.
User’s preference settings saved as Gamer 1.
User’s preference settings saved as Gamer 2.
User’s preference settings saved as Gamer 3.
Shadow Control Default is 0, then end-user can adjust from 0 to 20 increase for a clearer picture. If picture is too dark to be saw the detail clearly, adjusting from 0 to 20 for a clear picture.
Turn off frame buffer to decrease input lag.
Game Color will provide 0-20 level for adjusting saturation to get a better picture. Disable or Enable Adaptive-Sync. Adaptive-Sync Run Reminder: When the Adaptive-Sync feature is enabled, there may be flashing in some game environments. The”Dial Point”function places an aiming indicator in the center of screen for helping gamers to play First Person Shooter (FPS) games with accurate and precise aiming.
Zoom in locally to make it easier to target when shooting.
MBR (Motion Blur Reduction) Provides 0-20 levels of adjustments to reduce motion blur. Note: The MBR function can be adjusted when Adaptive-Sync is turned off, and the refresh rate 80Hz.

MBR Sync Overdrive Frame Counter

Off / On
Normal Fast Faster Fastest Extreme Off / Right-up / RightDown / Left-Up / LeftDown

Disable or Enable MBR Sync (Motion Blur Remove). Note: The MBR Sync function can be adjusted when AdaptiveSync is turned On, and the input signal is variable frequency. Adjust the response time. Note: 1. If the user adjusts OverDrive to “Fastest” the displayed image may be blurred. Users can adjust the OverDrive level or turn it off according to their preferences. 2. The “Extreme” function is optional when Adaptive-Sync is turned off, and the refresh rate is 80Hz. 3. The screen brightness will decrease when the “Extreme”function is turned on.
Display V frequency on the corner selected.

Note:

1). When “HDR Mode” under “Picture” is enable, the items “Shadow Control”, “Game Color” cannot be adjusted.
2). When “HDR” under “Picture” is enable, the items “Gaming Mode”, “Game Color”, “MBR Sync” and “MBR” can not be adjusted. “Extreme” under “Overdrive” is not available.
3). When the “Color Space” under “Picture” is set to “sRGB” or “DCI-P3”, the items “Shadow Control” and “Game Color” cannot be adjusted.

Picture

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

Brightness Contrast
Dark Boost Sharpness
Gamma Eco Adjustment
Color Temp. Red

BRIGHTNESS 70

INPUT SOURCE DP

Brightness Contrast Dark Boost Sharpness Gamma
Eco Adjustment
Color Temp.
Red Green

0-100 0-100 Off / Level 1 / Level 2 / Level 3 0-100 1.8 / 2.0 / 2.2 / 2.4 / 2.6 Standard Text Internet Game Movie Sports Reading Uniformity Warm Normal Cool User 0-100 0-100

Backlight Adjustment. Contrast from Digital-register. Enhance the screen details in the dark or bright area to adjust the brightness in the bright area and ensure that it is not oversaturated. Adjust Sharpness. Adjust Gamma. Standard Mode. Text Mode. Internet Mode. Game Mode. Movie Mode. Sports Mode. Reading Mode. Uniformity Mode. Warm Color Temperature. Normal Color Temperature. Cool Color Temperature. Restore Color Temperature. Red gain from Digital-register. Green gain from Digital-register.

Blue

0-100

R.Saturation 0-100

G.Saturation 0-100

B.Saturation 0-100

C.Saturation 0-100

M.Saturation 0-100

Y.Saturation 0-100

R.Hue

0-100

G.Hue

0-100

B.Hue

0-100

C.Hue

0-100

M.Hue

0-100

Y.Hue

0-100

Off

DisplayHDR

HDR

HDR Picture

HDR Movie

HDR Game

Off

HDR Mode

HDR Picture HDR Movie

HDR Game

Off DCR
On

Panel Native

Color Space sRGB

DCI-P3

Off

LowBlue Mode

Multimedia Internet Office Reading

Blue gain from Digital-register. Adjust R.Saturation. Adjust G.Saturation. Adjust B.Saturation. Adjust C.Saturation. Adjust M.Saturation. Adjust Y.Saturation. Adjust R.Hue. Adjust G.Hue. Adjust B.Hue. Adjust C.Hue. Adjust M.Hue. Adjust Y.Hue.
Set the HDR profile according to your usage requirements. Note: When HDR is detected, the HDR option is displayed for adjustment.
Optimized for the color and contrast of the picture, which will simulate showing the HDR effect. Note: When HDR is not detected, the HDR Mode option is displayed for adjustment.
Disable dynamic contrast ratio. Enable dynamic contrast ratio. Standard color space panel. sRGB Color space. DCI-P3 Color space.
Decrease blue light wave by controlling color temperature.
18

Image Ratio

Full / Aspect / 1:1 / 17″ (4:3) / 19″ (4:3) / 19″ (5:4) / 19″W (16:10) / 21.5″W (16:9)/ 22″W (16:10)/ 23″W (16:9) / 23.6″W (16:9) / 24″W (16:9)

Select image ratio for display.

Note:
1). When “HDR Mode” is enable, the items “Contrast”, “Dark Boost”, “Gamma”, “Eco Adjustment”, “Color Temp.”, “Color Space” and “LowBlue Mode” cannot be adjusted.
2). When “HDR” is set to “DisplayHDR”, all the items under “Picture” except “HDR”, “Sharpness” cannot be adjusted. When “HDR” is set to “HDR Picture”, “HDR Movie” or “HDR Game”, the items “Gamma”, “Eco Adjustment”, “Color Temp.” , “6-Axis Color Saturation/Hue”, “DCR”, “Color Space” and “LowBlue Mode” cannot be adjusted.
3). When the “Color Space” is set to “sRGB” or “DCI-P3”, the items “Contrast”, “Dark Boost”, “Gamma”, “Eco Adjustment”, “Color Temp.”, “6-Axis Color Saturation/Hue”, “HDR Mode” and “LowBlue Mode” cannot be adjusted.
4). When the “Eco Adjustment” is set to “Reading”, “Contrast”, “Dark Boost”, “Color Temp.”, “6-Axis Color Saturation/Hue”, “DCR”, “Color Space” and “Low blue mode” cannot be adjusted.
5). When the “Gaming Mode” under “Game Setting” is set to non “Standard” mode, the item “Eco Adjustment”, , “6-Axis Color Saturation/Hue”, “HDR Mode” and “Color Space” cannot be adjusted.

PIP/PBP

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

PIP/PBP Mode Main Source Sub Source Audio Size Position Swap

BRIGHTNESS 70

INPUT SOURCE DP

PIP/PBP Mode Main Source Sub Source Audio Size
Position
Swap

Off / PIP / PBP
Main Source Sub Source Small / Middle / Large Right-up Right-down Left-up Left-down On: Swap Off: non action

Disable or Enable PIP or PBP. Select main screen source. Select sub screen source. Select main screen or sub screen Audio Setup. Select screen size.
Set the screen location.
Swap the screen source.

Note:
1). When “HDR” under “Photo” is set to the non-off state, all items under “PIP/PBP” cannot be adjusted. 2). When PIP/PBP is enabled, some color-related adjustments in the OSD menu are valid only for the main
screen, while the sub-screen is not supported. Hence, the main screen and the sub-screen may have different colors.

3) When PBP/PIP is enabled, the compatibility of the main screen/sub-screen input source is shown in the following table:

PBP

Main source

HDMI1

HDMI2

HDMI1

Sub source

HDMI2

Main source

PIP

HDMI1

HDMI2

HDMI1

Sub source

HDMI2

Settings

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

Language Input Select Break Reminder
Off Timer DDC/CI
Reset

BRIGHTNESS 70

INPUT SOURCE DP

Language Input Select Break Reminder Off Timer DDC/CI Reset

Auto / HDMI1 / HDMI2 / DP Off / On 0-24 hrs No / Yes No / Yes

Select the OSD language.
Select Input Signal Source. Break reminder if the user continuously works for more than 1hrs. Select DC off time.
Turn On/Off DDC/CI Support.
Reset the menu to default.

Audio

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

Volume Mute

BRIGHTNESS 70

INPUT SOURCE DP

Volume Mute

0-100 Off / On

Volume Adjustment. Mute the volume.

OSD Setup

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

Transparence H. Position V. Position Time out User Key

BRIGHTNESS 70

INPUT SOURCE DP

Transparence H. Position V. Position Timeout
User Key

0-100

Adjust the transparence of OSD.

0-100

Adjust the horizontal position of OSD.

0-100

Adjust the vertical position of OSD.

5-120
Dual Resolution/ Gaming Mode / Sniper Scope / Frame Counter

Adjust the OSD Timeout. User set ” ” key shortcut menu.

Information

RESOLUTION 3840×2160

REFRESH RATE 60 HZ

GAMING MODE Standard

Game Setting Picture PIP/PBP Settings Audio
OSD Setup Information

Model Name Resolution HDR Sync Firmware Version Serial Number

BRIGHTNESS 70

INPUT SOURCE DP

U27G4R 3840(H)x2160(V)/60Hz
SDR Adaptive-Sync xxxxxxxxxxxxx xxxxxxxxxxxxx

LED Indicator
Status Full Power Mode Active-off Mode

LED Color White Orange

Troubleshoot

Problem & Question

Possible Solutions

Power LED Is Not ON
No image on the screen
Picture Is Fuzzy & Has Ghosting Shadowing Problem Picture Bounces, Flickers Or Wave Pattern Appears In The Picture
Monitor Is Stuck In Active Off-Mode”
Missing one of the primary colors (RED, GREEN, or BLUE) Screen image is not centered or sized properly Picture has color defects (white does not look white) Horizontal or vertical disturbances on the screen Regulation & Service

Make sure the power button is ON and the Power Cord is properly connected to a grounded power outlet and to the monitor.
Is the power cord connected properly? Check the power cord connection and power supply. Is the video cable connected correctly? (Connected using the HDMI cable) Check the HDMI cable connection. (Connected using the DisplayPort cable) Check the DisplayPort cable connection. * HDMI/DisplayPort input is not available on every model. If the power is on, reboot the computer to see the initial screen (the login screen.) If the initial screen (the login screen) appears, boot the computer in the applicable mode (the safe mode for Windows 7/8/10) and then change the frequency of the video card. (Refer to the Setting the Optimal Resolution) If the initial screen (the login screen) does not appear, contact the Service Center or your dealer. Can you see “Input Not Supported” on the screen? You can see this message when the signal from the video card exceeds the maximum resolution and frequency that the monitor can handle properly. Adjust the maximum resolution and frequency that the monitor can handle properly. Make sure the AOC Monitor Drivers are installed. Adjust the Contrast and Brightness Controls. Press hot-key (AUTO) to auto-adjust. Make sure you are not using an extension cable or switch box. We recommend plugging the monitor directly to the video card output connector on the back. Move electrical devices that may cause electrical interference as far away from the monitor as possible. Use the maximum refresh rate your monitor is capable of at the resolution you are using. The Computer Power Switch should be in the ON position. The Computer Video Card should be snugly fitted in its slot. Make sure the monitor’s video cable is properly connected to the computer. Inspect the monitor’s video cable and make sure no pin is bent. Make sure your computer is operational by hitting the CAPS LOCK key on the keyboard while observing the CAPS LOCK LED. The LED should either turn ON or OFF after hitting the CAPS LOCK key.
Inspect the monitor’s video cable and make sure that no pin is damaged. Make sure the monitor’s video cable is properly connected to the computer.
Adjust H-Position and V-Position or press hot-key (AUTO).
Adjust RGB color or select desired color temperature.
Use Windows 7/8/10/11 shut-down mode to adjust CLOCK and FOCUS. Press hot-key (AUTO) to auto-adjust. Please refer to Regulation & Service Information which is in the CD manual or www.aoc.com (to find the model you purchase in your country and to find Regulation & Service Information in Support page.

Specification

General Specification

Model name

U27G4R

Driving system

TFT Color LCD

Panel

Viewable Image Size Pixel pitch

68.4 cm diagonal 0.15525mm(H) x 0.15525mm(V)

Video

HDMI lnterface & DisplayPort Interface

Display Color

1.07B Colors [1]

Others

Horizontal scan range Horizontal scan Size(Maximum) Vertical scan range Vertical Scan Size(Maximum)
Optimal preset resolution
Max resolution
Plug & Play

30k~360kHz
596.16mm
48~160Hz(UHD) 48~320Hz(FHD) 335.34mm 3840×2160@60Hz(UHD) 1920×1080@60Hz(FHD) 3840×2160@160Hz(UHD) 1920×1080@320Hz(FHD) VESA DDC2B/CI

Power Source

100-240V~ 50/60Hz 1.5A

Typical(default brightness and contrast) 34W

Power Consumption

Max. (brightness = 100, contrast =100)

95W

Standby Mode

0.5W

Normal Operation

116.04 BTU/hr (typ.)

Heat Dissipation

Sleep (Standby mode) Off mode

<1.71 BTU/hr <1.02 BTU/hr

Physical

Connector Type

Characteristics Signal Cable Type

Off mode(AC switch)
USB UP/USB-Ax4 (include 1 fast charge) HDMIx2/DisplayPort/Earphone
Detachable

0 BTU/hr

Temperature

Operating Non-Operating

0°C~40°C -25°C~55°C

Environmental Humidity

Operating Non-Operating

10%~85% (Non-Condensing) 5%~93% (Non-Condensing)

Altitude

Operating Non-Operating

0m~5000m (0ft~16404ft) 0m~12192m (0ft~40000ft)

Note:

[1]The maximum number of display colors supported by this product is 1.07 billion, and the setting conditions

are as follows (there may be differences due to the output limitation of some graphics cards)

(“V”:support, “” :nonsupport):

Color Bit

SStCaigotenloarlFVoerrmsiaotn

HDMI2.1

DisplayPort1.4

YCbCr420 YCbCr422

YCbCr420 YCbCr444 RGB
YCbCr422

YCbCr444 RGB

FHD 320Hz 10 bpc

FHD 320Hz 8 bpc

FHD 240Hz 10 bpc

FHD 240Hz 8 bpc

UHD 160Hz 10 bpc

UHD 160Hz 8 bpc

UHD 144Hz 10 bpc

UHD 144Hz 8 bpc

UHD 120Hz 10 bpc

UHD 120Hz 8 bpc

UHD 75Hz 10 bpc

UHD 75Hz 8bpc

Low Resolution 10 bpc

Low Resolution 8 bpc

Note: Windows operating systems with 8bit+YCbCr422 and later do not support HDR.

AOC Monitors Panel Pixel Defect Policy
AOC strives to deliver the highest quality products. We use some of the industry’s most advanced manufacturing processes and practice stringent quality control. However, pixel or sub pixel defects on the Monitor panels used in the monitors are sometimes unavoidable. No manufacturer can guarantee that all panels will be free from pixel defects, but AOC guarantees that any monitor with an unacceptable number of defects will be repaired or replaced under warranty. This notice explains the different types of pixel defects and defines acceptable defect levels for each type. In order to qualify for repair or replacement under warranty, the number of pixel defects on a Monitor panel must exceed these acceptable levels. For example, no more than 0.0004% of the sub pixels on a monitor may be defective. Furthermore, AOC sets even higher quality standards for certain types or combinations of pixel defects that are more noticeable than others. This policy is valid worldwide.
subpixel
pixel
Pixels and Sub pixels A pixel, or picture element, is composed of three sub pixels in the primary colors of red, green and blue. Many pixels together form an image. When all sub pixels of a pixel are lit, the three colored sub pixels together appear as a single white pixel. When all are dark, the three colored sub pixels together appear as a single black pixel. Other combinations of lit and dark sub pixels appear as single pixels of other colors. Types of Pixel Defects Pixel and sub pixel defects appear on the screen in different ways. There are two categories of pixel defects and several types of sub pixel defects within each category. Bright Dot Defects Bright dot defects appear as pixels or sub pixels that are always lit or ‘on’. That is, a bright dot is a sub-pixel that stands out on the screen when the monitor displays a dark pattern. There are the types of bright dot defects.
One lit red, green or blue sub pixel.
Two adjacent lit sub pixels: – Red + Blue = Purple – Red + Green = Yellow – Green + Blue = Cyan (Light Blue)
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Three adjacent lit sub pixels (one white pixel). Note A red or blue bright dot must be more than 50 percent brighter than neighboring dots while a green bright dot is 30 percent brighter than neighboring dots.
Black Dot Defects
Black dot defects appear as pixels or sub pixels that are always dark or `off’. That is, a dark dot is a sub-pixel that stands out on the screen when the monitor displays a light pattern. These are the types of black dot defects.

Proximity of Pixel Defects
Because pixel and sub pixels defects of the same type that are near to one another may be more noticeable, AOC also specifies tolerances for the proximity of pixel defects.

Pixel Defect Tolerances

In order to qualify for repair or replacement due to pixel defects during the warranty period, a Monitor panel in a AOC panel monitor must have pixel or sub pixel defects exceeding the tolerances listed in the web manual.

BRIGHT DOT DEFECTS 1 lit subpixel 2 adjacent lit subpixels 3 adjacent lit subpixels (one white pixel) Distance between two bright dot defects* Total bright dot defects of all types BLACK DOT DEFECTS 1 dark subpixel

ACCEPTABLE LEVEL 2 1 0 15mm 2 ACCEPTABLE LEVEL 5 or fewer

2 adjacent dark subpixels

2 or fewer

3 adjacent dark subpixels Distance between two black dot defects* Total black dot defects of all types

0 15mm 5 or fewer

TOTAL DOT DEFECTS

ACCEPTABLE LEVEL

Total bright or black dot defects of all types 5 or fewer

Note *: 1 or 2 adjacent sub pixel defects = 1 dot defect.

Preset Display Modes

STANDARD VGA
DOS MODE SVGA
XGA FHD QHD UHD

RESOLUTION(±1Hz)
640×480@60Hz 640×480@67Hz 640×480@72Hz 640×480@75Hz 640×480@100Hz 640×480@120Hz 720×400@70Hz 800×600@56Hz 800×600@60Hz 800×600@72Hz 800×600@75Hz 800×600@100Hz 800×600@120Hz 832×624@75Hz 1024×768@60Hz 1024×768@70Hz 1024×768@75Hz 1024×768@100Hz 1024×768@120Hz 1280×1024@60Hz 1280×1024@75Hz 1920×1080@60Hz 1920×1080@240Hz 1920×1080@320Hz 2560×1440@120Hz 2560×1440@144Hz 3840×2160@60Hz 3840×2160@75Hz 3840×2160@100Hz 3840×2160@120Hz 3840×2160@144Hz 3840×2160@160Hz

HORIZONTAL FREQUENCY(KHz)
31.469 35
37.861 37.5 51.08 61.91
31.469 35.156 37.879 48.077 46.875 63.68 77.43 49.725 48.363 56.476 60.023 81.577 97.551 63.981 79.976
67.5 274.6 355.2 182.996 222.194 133.32 166.653 222.203 268.811 319.976 350.402

VERTICAL FREQUENCY(Hz)
59.94 66.667 72.809
75 99.769 119.518 70.087 56.25 60.317 72.188
75 99.662 119.854 74.551 60.004 70.069 75.029 99.972 119.989 60.02 75.025
60 240 320 119.998 144.001 60 75.0001 100.001 120.700 144.004 160.001

Note: According to the VESA standard, there may be a certain error (+/-1Hz) when calculating the refresh rate
(field frequency) of different operating systems and graphics cards. In order to improve compatibility, the nominal refresh rate of this product has been rounded off. Please refer to the actual product.

Pin Assignments

19-Pin Color Display Signal Cable

Pin No. 1. 2. 3. 4. 5.

Signal Name TMDS Data 2+ TMDS Data 2 Shield TMDS Data 2TMDS Data 1+ TMDS Data 1Shield

TMDS Data 1-

TMDS Data 0+

TMDS Data 0 Shield

Pin No. Signal Name

TMDS Data 0-

10.

TMDS Clock +

11.

TMDS Clock Shield

12.

TMDS Clock-

13.

CEC

Pin No. 17. 18. 19.

Signal Name DDC/CEC Ground +5V Power Hot Plug Detect

14.

Reserved (N.C. on device)

15.

SCL

16.

SDA

20-Pin Color Display Signal Cable

Pin No. 1 2 3 4 5 6 7 8 9 10

Signal Name ML_Lane 3 (n) GND ML_Lane 3 (p) ML_Lane 2 (n) GND ML_Lane 2 (p) ML_Lane 1 (n) GND ML_Lane 1 (p) ML_Lane 0 (n)

Pin No. 11 12 13 14 15 16 17 18 19 20

Signal Name GND ML_Lane 0 (p) CONFIG1 CONFIG2 AUX_CH(p) GND AUX_CH(n) Hot Plug Detect Return DP_PWR DP_PWR

Plug and Play
Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities. The DDC2B is a bi-directional data channel based on the I2C protocol. The host can request EDID information over the DDC2B channel.
®
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Documents / Resources

AOC U27G4R Gaming Monitor [pdf] User Manual
U27G4R, U27G4R Gaming Monitor, Gaming Monitor, Monitor

References

User Manual

AOC U27G4R Gaming Monitor User Manual

U27G4R Gaming Monitor

Specifications

Product Usage Instructions

Safety

Installation

Cleaning

Other

Setup

FAQ

Q: What should I do if the monitor falls?

Q: Can I use any power source for the monitor?

Documents / Resources

References

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