1. Introduction
This manual provides detailed instructions for the installation, configuration, and operation of your ASUS P7P55D-E LX motherboard. This motherboard supports Intel Core i3, i5, and i7 processors in an LGA 1156 socket, featuring the Intel P55 Express chipset, SATA 6Gb/s, and USB 3.0 connectivity. Please read this manual thoroughly before beginning installation to ensure proper setup and to maximize system stability and performance.
2. Safety Information
Always observe the following safety precautions when working with computer hardware:
- Disconnect the power cord from the wall outlet before touching any components.
- Wear an anti-static wrist strap to prevent electrostatic discharge (ESD) damage to components.
- Handle components by their edges; avoid touching pins or circuitry.
- Ensure proper ventilation within your computer case to prevent overheating.
- Keep liquids away from electronic components.
3. Package Contents
Verify that your package contains the following items. If any item is damaged or missing, contact your retailer.
- ASUS P7P55D-E LX Motherboard
- User Manual
- I/O Shield
- SATA Data Cables
- Support DVD (containing drivers and utilities)
4. Setup and Installation
4.1 Motherboard Layout
Familiarize yourself with the various components and connectors on the motherboard before installation.
Figure 1: Overview of the ASUS P7P55D-E LX Motherboard. This image displays the general layout, including the CPU socket, DIMM slots, expansion slots, and various connectors.
4.2 CPU Installation
This motherboard supports Intel Core i3/i5/i7 processors with an LGA 1156 socket.
- Locate the LGA 1156 CPU socket on the motherboard.
- Open the CPU socket lever and lift the load plate.
- Carefully align the CPU with the socket, ensuring the triangular mark on the CPU matches the mark on the socket. Do not force the CPU into the socket.
- Close the load plate and push down the lever until it locks into place.
- Apply thermal paste to the CPU and install the CPU cooler according to its manufacturer's instructions.
4.3 Memory Installation
The motherboard has four 240-pin DDR3 DIMM slots, supporting up to 16GB of non-ECC, unbuffered DDR3 memory at speeds up to 2200(OC)/1600/1333/1066 MHz in dual-channel configuration.
- Open the clips at both ends of the DIMM slot.
- Align the memory module with the slot, ensuring the notch on the module matches the key on the slot.
- Insert the module firmly into the slot until the clips snap into place.
- For dual-channel operation, install memory modules in matching colored slots (e.g., A1 and B1).
4.4 Expansion Card Installation
The motherboard features 1x PCI-Express 2.0 x16 slot, 4x PCI-Express 2.0 x1 slots, and 2x PCI slots.
- Select an appropriate expansion slot for your card (e.g., graphics card in PCIe x16).
- Remove the corresponding metal slot cover from your computer case.
- Align the card with the slot and press it firmly until it is securely seated.
- Secure the card with a screw or retention clip to the case.
4.5 Storage Device Connection
Connect your storage devices (HDDs, SSDs, optical drives) to the appropriate ports.
- SATA Ports: The motherboard includes 6x SATA 3Gb/s ports (supporting RAID 0, 1, 5, 10) and 2x SATA 6Gb/s ports. Use SATA data cables to connect your drives to these ports.
- IDE Port: One ATA-133 channel is available for older IDE devices.
- eSATA Port: An eSATA port is available on the rear I/O panel for external SATA devices.
4.6 Front Panel Connectors
Connect your computer case's front panel cables (power button, reset button, HDD LED, power LED, front USB, front audio) to the corresponding headers on the motherboard. Refer to the motherboard diagram for exact locations.
4.7 Power Connections
Connect the power supply unit (PSU) cables to the motherboard.
- 24-pin Main Power Connector: Connect the large 24-pin ATX power cable from your PSU.
- 8-pin CPU Power Connector: Connect the 8-pin (or 4+4 pin) CPU power cable from your PSU to the connector near the CPU socket.
5. Operating Instructions
5.1 BIOS/UEFI Setup
The BIOS (Basic Input/Output System) is firmware that initializes hardware during the boot process. To enter the BIOS setup utility, press the Delete key during the Power-On Self-Test (POST).
- Boot Order: Configure the boot device priority (e.g., USB, DVD-ROM, HDD).
- System Time/Date: Set the correct system time and date.
- Overclocking (Optional): The motherboard supports overclocking features. Adjust these settings with caution and only if you understand the implications. The MemOK! feature can reset memory settings to default if instability occurs.
- Save & Exit: Always save changes before exiting the BIOS.
5.2 Driver Installation
After installing your operating system, install the necessary drivers for optimal performance. Use the provided support DVD or download the latest drivers from the ASUS official website.
- Chipset Drivers
- Audio Drivers (VIA VT1708S 8-Channel High-Definition Audio CODEC)
- LAN Drivers (Realtek 8112L Gigabit Ethernet Controller)
- USB 3.0 Drivers
- SATA/RAID Drivers
6. Maintenance
6.1 Cleaning
Regular cleaning helps maintain optimal performance and extends the lifespan of your motherboard.
- Ensure the system is powered off and unplugged before cleaning.
- Use compressed air to remove dust from fans, heatsinks, and other components.
- Wipe surfaces with a soft, lint-free cloth. Avoid using liquid cleaners directly on components.
6.2 BIOS Updates
Periodically check the ASUS support website for BIOS updates. BIOS updates can improve system stability, add support for new hardware, or fix bugs. Follow the instructions provided by ASUS carefully when performing a BIOS update to avoid system damage.
7. Troubleshooting
This section addresses common issues you might encounter.
7.1 No Power / System Does Not Boot
- Check all power connections: 24-pin ATX, 8-pin CPU, and power cables to graphics cards and drives.
- Ensure the power supply unit (PSU) is switched on.
- Verify that the front panel power button is correctly connected to the motherboard header.
- Test the PSU with another system or a PSU tester if available.
7.2 No Display Output
- Ensure the monitor is connected to the graphics card (if installed) and powered on.
- Reseat the graphics card in its PCIe slot.
- Reseat memory modules. Incorrectly seated memory is a common cause of no display.
- Try booting with only one memory module installed.
7.3 System Instability / Random Crashes
- Check CPU and GPU temperatures. Overheating can cause instability.
- Ensure all drivers are up to date.
- Run memory diagnostic tools to check for faulty RAM.
- If overclocking, revert to default BIOS settings. The MemOK! button can help reset memory settings.
- Check for loose cables or components.
7.4 USB 3.0 / SATA 6Gb/s Devices Not Detected
- Ensure the correct USB 3.0 and SATA 6Gb/s drivers are installed.
- Verify that the devices are properly connected to the correct ports.
- Check BIOS settings to ensure these ports are enabled.
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | P7P55D-E LX |
| CPU Socket | LGA 1156 |
| Compatible Processors | Intel Core i3, Intel Core i5, Intel Core i7 (LGA 1156) |
| Chipset | Intel P55 Express |
| Memory Slots | 4x 240-pin DDR3 DIMM |
| Memory Type | DDR3 2200(OC)/1600/1333/1066 MHz, Non-ECC, Unbuffered, Dual Channel |
| Max Memory Capacity | 16 GB |
| PCIe 2.0 x16 Slots | 1 |
| PCIe 2.0 x1 Slots | 4 |
| PCI Slots | 2 |
| SATA 3Gb/s Ports | 6 (Support RAID 0, 1, 5, 10) |
| SATA 6Gb/s Ports | 2 |
| IDE Channel | 1x ATA-133 |
| eSATA Port | 1 |
| USB 2.0 Ports | 12 (6 rear, 6 mid-board) |
| USB 3.0 Ports | 2 (rear) |
| Audio | VIA VT1708S 8-Channel High-Definition Audio CODEC |
| LAN | Realtek 8112L Gigabit Ethernet Controller |
| Rear I/O Ports | 2x PS/2, 1x eSATA, 1x Optical S/PDIF Out, 1x RJ45 LAN, 6x USB 2.0, 2x USB 3.0, Audio I/O Jacks |
| Power Connectors | 1x 24-pin ATX, 1x 8-pin CPU |
| Form Factor | ATX |
9. Warranty and Support
For detailed warranty information, please refer to the warranty card included with your product or visit the official ASUS website. ASUS provides technical support and resources to assist with any issues or questions you may have.
- ASUS Official Website: www.asus.com
- Support Page: Look for your product model on the support section of the ASUS website for drivers, BIOS updates, and FAQs.
