EK-XLC Predator 240/360 User Guide

Introduction

EK Water Blocks, founded by Edvard König, has been a pioneer in liquid cooling since 1999. The company offers a comprehensive range of liquid cooling products, including CPU water blocks, radiators, fans, and pumps. The EK-XLC Predator is an all-in-one expandable liquid cooling solution designed for high-performance PC enthusiasts.

Safety Precautions ⚠️

• Keep the product away from children.
• Check all components for damage before installation. Contact the seller if any issues arise.
• EKWB d.o.o. is not liable for damages caused by improper use, electrical issues, accidents, neglect, alterations, repairs, or incorrect installation.
• Incorrect installation can damage the CPU and motherboard.
• Disassembling the product or using non-EKWB parts may void the warranty.
• Product warranty period is 24 months.

Scope of Delivery

EK-XLC Predator 240

The EK-XLC Predator 240 includes:

• EK-XLC Predator CPU water block unit
• CPU Backplate mechanism
• CPU Mounting mechanism (including M4 threaded thumb screws, LGA-2011 M4 threaded mounting studs, springs, M4 threaded thumb nuts, washers)
• EK-Supremacy Backplate (for LGA-115x with rubber gasket)
• Thermal grease
• Installation manual

EK-XLC Predator 360 (incl. QDC)

Includes all items for the Predator 240, plus Quick Disconnect Couplings (QDC) for easier expansion.

Required Tools ?

• Phillips-head screwdriver (not included)

Video Installation Guides ▶️

Visit the official EKWB YouTube channel for video installation guides.

Radiator Space Constraint Requirements

EK-XLC Predator 240

Dimensions:

• Radiator/Fans: 133 mm (5.24 in) width, 295 mm (11.61 in) length, 68 mm (2.68 in) depth (including fans).
• Pump height: 120 mm (4.72 in).

EK-XLC Predator 360 (incl. QDC)

Dimensions:

• Radiator/Fans: 133 mm (5.24 in) width, 415 mm (16.34 in) length, 68 mm (2.68 in) depth (including fans).
• Pump height: 120 mm (4.72 in).
• QDC connection: 15 mm (0.59 in) extension.

Unit Orientation Limitations

CAUTION: Incorrect unit orientation can lead to insufficient cooling performance and premature failure. The following orientations are recommended for both 240 and 360 models:

• Fans facing upwards or sideways.
• Pump positioned above the radiator.

Avoid orientations where the pump is below the radiator or the unit is mounted upside down with fans facing downwards.

Electrical Connections

Connecting the Hub to the Power Supply

1. Connect the two-pin PCI-express minifit power cable to the fan splitter hub.
2. Connect the SATA POWER connector to the main power supply.

Connecting the Hub to the Motherboard

For PWM fan speed control:

1. Connect the two-pin cable connector to the fan splitter hub.
2. Connect the 4-pin connector to a CPU-dedicated fan header on the motherboard. Using CPU fan headers typically ensures the best PWM regulation.

Installing the Pump/Fan/Radiator Unit

1. Step 1: Mount the unit using the provided fan mounting screws (8 for 240mm, 12 for 360mm). A Phillips-head screwdriver is required.
2. Step 2: Prepare your PC chassis. Ensure the unit fits, typically using standard 120mm fan mounting holes (105mm spacing). The default configuration is for hot air exhaust. For optimal airflow, aim for unidirectional flow. Refer to the FAQ section for changing fan orientation.
3. Step 3: Align the unit's fan mounting holes with the chassis mounting points. Secure the unit using the self-tapping screws. Avoid overtightening. Ensure the unit does not touch the chassis except at mounting points to prevent noise from vibrations.

General Information on Waterblock Compatibility

The EK-XLC Predator is pre-assembled for modern Intel desktop socket motherboards and supports:

• Intel® Socket LGA-775
• Intel® Socket LGA-115x
• Intel® Socket LGA-1366
• Intel® Socket LGA-2011(-3)

Note: Narrow server type LGA-2011 requires a specific mounting plate (EK-Supremacy LGA-2011 Narrow ILM).

Installing the Water Block

LGA-2011(-3) Socket Motherboards

1. Step 1: Prepare the mounting mechanism. Install four LGA-2011 M4 thumb screws into the integrated latch mechanism (ILM) on the motherboard. No tools are needed for this step. It is recommended to remove the motherboard from the chassis for easier installation.
2. Step 2: Clean the CPU's contact surface with a non-abrasive cloth or Q-tip. Apply thermal compound (EK-TIM Ectotherm) to the CPU heat spreader (IHS) in a blob or line. Approximately two rice grains of compound is sufficient.
3. Step 3: Align the water block over the mounting screws. Remove the protective foil from the water block's base. Place compression springs and thumb nuts over the screws. Fasten the thumb nuts evenly, preferably in a cross pattern, without tools, until snug.

Starting your computer: After installation, check for leaks and monitor CPU temperatures. Enter BIOS/UEFI to check hardware health.

LGA-115x Socket Motherboards

1. Step 1: If the motherboard is installed, remove it and place it face down.
2. Step 2: Prepare the backplate rubber gasket. Ensure the gasket is correctly positioned and remove the inner cut-out part if necessary for your specific motherboard.
3. Step 3: Install the backplate and rubber gasket onto the back of the motherboard, aligning holes. Ensure the ribbed side of the backplate faces away from the motherboard.
4. Step 4: Install four M4 thumb screws with 0.7mm plastic washers onto the motherboard. Tighten them to the metal backplate until the thread ends. Do not use tools.
5. Step 5: Clean the CPU surface and apply thermal compound as described for LGA-2011.
6. Step 6: Align the water block over the mounting screws. Place coiled springs and thumb nuts over the M4 thumb screws. Fasten the thumb nuts evenly, preferably in a cross pattern, until snug.
7. Step 7: Install the CPU water block and motherboard back into the computer chassis.

The water block installation is now complete.

Possibilities of Expanding the System

EK-XLC Predator 240

The EK-XLC Predator 240 can be expanded with one additional water block, radiator, and reservoir (optional). The complete unit may need to be removed from the chassis for expansion.

Recommended for expansion:

• Additional water block/reservoir
• Tubing: EK-Tube ZMT Matte Black 15.9/9.5mm
• Fittings: EK-ACF Fitting 10/16mm
• Coolant: EK-Ekoolant EVO CLEAR (Premix 1L)
• EK-ATX Bridging Plug

Required tools: Scissors, 6mm Allen key.

Before starting: Place a container and paper towels to catch potential coolant spills.

1. Step 1: Drain the loop by unscrewing the fitting compression ring on the CPU water block counter-clockwise.
2. Step 2: Gently pull the tube off the fitting. Use a cup to collect drained coolant. Tilting the unit can help drain more coolant.
3. Step 3: Mount the additional component (water block, radiator) according to its manual.
4. Step 4: Connect the Predator's tube to the new component's fitting (e.g., 10/16 fitting). Ensure the tube is seated firmly and tighten the compression ring by hand. If the tube is too short, cut a new one.
5. Step 5: Measure and cut tubing for connections between components.
6. Step 6: Attach tubing to fittings and secure compression rings. Ensure all tubing is properly secured.

Filling up the System

1. Step 7: Use a 6mm Allen key to unscrew the plug on the rear of the Predator unit's radiator.
2. Step 8: Add coolant slowly through the port until the unit is full. Gently shake or tilt the unit to dislodge air bubbles. Repeat until no air remains. Ensure as much air as possible is removed.
3. Step 9: Reinstall the radiator plug. Position the unit with fans facing upwards.
4. Step 10: Unscrew the integrated reservoir plug and add more coolant if needed.

Optional: ATX Bridging Plug

Use the EK-ATX Bridging Plug to jump-start the computer's power supply for filling and bleeding. Unplug fans and other peripherals from the power supply during this process.

Assisted Bleeding Air

1. Turn off the computer.
2. Add more coolant.
3. Turn on the computer and let it run for 5 minutes.
4. Shake and tilt the unit to release air bubbles. Reinstall the plug to prevent spillage.
5. Repeat steps 1-4 until the unit is full and rattling noise diminishes.

Leak Testing and Startup

1. Step 14: Conduct a 24-hour leak test to ensure the system is leak-free.
2. Reinstall the unit into the chassis. Double-check all installations before powering on.
3. Step 15: Turn on the computer. Monitor CPU temperatures and check BIOS/UEFI for hardware health.

Optional: Adding an External Reservoir

Installing an external reservoir is recommended for easier refilling and better flow balance. Mount the reservoir as the last stage before the liquid enters the pump/radiator unit. Follow expansion steps (1-12) and fill the reservoir between steps 7 and 8. Fill the loop at the highest point.

Installing Transparent Tubing (Optional)

Replacing original EPDM tubing with transparent PVC tubing may lead to coolant evaporation. EK recommends checking coolant levels regularly and using external reservoirs when using PVC tubing. Modifying the unit with solid tubing without an external reservoir may cause malfunctions or leaks due to pressure buildup.

EK-XLC Predator 360 (incl. QDC) Expansion

The EK-XLC Predator 360 (incl. QDC) supports expansion with up to two additional water blocks and one radiator. The no-spill QDC couplings allow for quick and safe expansion.

For expansion, you will need:

• A new pre-filled water block or radiator.
• Required tools: 6mm Allen key, ATX Bridging plug.

1. Step 1: Turn off and unplug the computer.
2. Step 2: Disconnect the QDC by pressing the release button and gently pulling the coupling apart.
3. Step 3: Mount the new water block/radiator according to its manual.
4. Step 4: Route tubes and connect QDC couplings, ensuring they do not contact other hardware.
5. Step 5: Connect the QDC couplings, ensuring a secure click.
6. Optional Step 6: Plug in the ATX bridging plug. Unplug other power connections.
7. Step 7: Turn on the power supply and check that only the pump is running.
8. Step 8: Perform a 24-hour leak test. Power off, remove the bridging plug, and reconnect other power cables.
9. Step 9: Start up the computer and check CPU temperatures in BIOS/UEFI.

Maintenance

Follow these tips for optimal performance and lifespan:

• TIP 1: Dust Removal: Clean dust every 2-3 months using a vacuum cleaner or compressed air, especially the radiator. Ensure the PC is powered off and unplugged. Clean outdoors if possible.
• TIP 2: Checking Electrical Components: Annually check pump and fan operation for silent running and responsiveness to PWM changes.
• TIP 3: Cleaning the Unit: Every 3 years, drain coolant, flush the radiator, check and clean the pump, and consider changing tubing.
• TIP 4: Use EK Designed Parts: Use only genuine EKWB parts and accessories to ensure performance, compatibility, and warranty.

Frequently Asked Questions

Q: Is Revision 1.1 (R1.1) compatible with all desktop LGA-2011(-3) motherboards? How about older LGA-1366 and -775?

A: Yes, the R1.1 is compatible with all standard LGA-2011-3 motherboards. For LGA-1366 and LGA-775, the optional EK-Supremacy EVO Backplate is required.

Q: How many water blocks can be added to the loop?

A: For optimal performance, it's recommended to add no more than one GPU water block for Predator 240 and two for Predator 360. An additional radiator can also be added. An external reservoir is recommended for easier filling and bleeding.

Q: What flow rates are expected with EK-XLC Predator?

A: Typical flow rates are around 135L/h (Predator 360) and 170L/h (Predator 240). Using QDC fittings can reduce flow rates to approximately 105L/h (single) or 90L/h (dual). Flow rates of 90L/h are adequate for high-power GPUs.

Q: Is it possible to flip the fan orientation?

A: Yes, but it requires careful handling of zip-ties. Use the provided Allen key to remove fans. Ensure zip-ties remain in place to prevent fan screws from damaging the radiator core.

Q: Can the Push-Pull Fan configuration be used?

A: Yes, additional fans can be mounted on the bottom for push-pull. Use the provided screws (M4x6 DIN7984) and Allen key (2.5mm). Use original screws only.

Q: Is it possible to 'daisy-chain' the integrated PWM splitter?

A: Yes, the splitter supports daisy-chaining of additional PWM splitter cables, provided the total power draw does not exceed 25W (2A on +12VDC).

Troubleshooting

In Case of CPU Overheating:

High CPU temperatures often indicate issues with the liquid cooling loop. Check for:

1. Malfunctioning Pump: Rapid temperature spikes when CPU is stressed. Ensure the pump is connected and liquid is flowing. Check for pump vibration. The 'GOOD' LED on the PWM splitter should be red.
2. Malfunctioning Fans: Similar temperature spikes. Ensure fans are connected and spinning. The 'GOOD' LED on the PWM splitter should be red.
3. Kinked Tubing: Restricts flow. Check tubing for kinks or obstructions, especially thin-walled tubing.
4. Clogged Microchannels: Impurities can clog channels, reducing flow and increasing temperature. Inspect the water block and clean the system if necessary.
5. Thermal Interface Material (TIM): Improper application (too much or too little) can cause overheating. Refer to installation steps for correct application.

Other causes of overheating:

• Poor CPU Thermal Contact: Some CPUs have inherent thermal contact issues. Replacing TIM or de-lidding (voids warranty) may be necessary.

For further assistance, consult the EK knowledge base at http://support.ekwb.com or contact EK Support.

The Cooler Is Too Loud:

Ensure fan speed control is set to PWM mode in the motherboard's UEFI/BIOS, not DC mode. Consult your motherboard manual for specific settings (e.g., ASUS QFAN Control, Gigabyte PC Health Status, MSI Hardware Monitor, ASRock H/W Monitor).

General Liquid Cooling Parts Cleaning Guide

Liquid cooling components can be disassembled for cleaning. Disassembly of the water block does not void warranty, but the EK leak-free guarantee is lost.

• Cleaning Bare Copper: Use slightly acidic agents like diluted white vinegar (5-10% acetic acid) or lemon juice (5-10% citric acid). Cola, ketchup, or mustard can also be used. Rinse thoroughly with distilled water.
• Cleaning Nickel Plated Copper: Avoid aggressive chemicals or rough materials. Clean with a soft, non-abrasive cloth and warm water. Use automotive metal polish for stubborn deposits. Rinse with distilled water.
• Cleaning Acrylic (Plexi) Glass Tops: Use only warm, soapy water and a soft toothbrush. Avoid alcohol, acetone, or other aggressive chemicals.
• Cleaning POM (Acetal) Tops: Use soft cloth and warm, soapy water. Chemicals like alcohol or acetone can be used sparingly. Rinse with distilled water.

Preventive Steps:

• Use corrosion-inhibiting coolant (e.g., EK-Ekoolant).
• Avoid Copper Sulphate based additives to prevent tarnishing.

Part Specification List

Pump: Xylem DDC - 3.1

Pump Type

DC centrifugal Pump

Bearing Type

Ceramic Bearing Ball

Rated Voltage

12VDC

Operating Voltage

8-13.2VDC (9V starting)

Pump RPM

3000RPM

Dimensions (LxWxH)

61x60x21 mm

Life Expectancy

>50,000 hrs

Max Head

1.6m

Operating Temperature

Ambient: 10-50°C, Fluid: 10-60°C

Performance graph shows Head (m) and Power (W) vs. Volumetric Flow Rate (l/h).

Fittings

Type

2x Compression, 2x Rotary Compression

Compatible Tubing

9.5mm / 15.9mm (ID/OD) metric, 3/8″ – 5/8″ (ID/OD) imperial

Thread Size

G1/4″

Material

Brass

Coating

Nickel

Disassembly of Rotary Compression Fittings: Use a 9mm Allen key (not included) to lock the barb from the inside for easier ring removal.

Fan Splitter Hub

Connects fans and pump to the motherboard for speed regulation. Features:

• 3x 4-pin PWM fan headers
• 1x 4-pin PWM pump header
• 1x 2-pin tacho/PWM header
• 1x 2-pin power header
• Power LED indicator
• Uniform PWM control

Connecting Pump Directly to Motherboard Fan Header (Optional): Disconnect the pump from the splitter and connect it to the CPU fan header for separate control.

Fans: EK-Vardar F4-120

Fan Type

PWM

Rated Voltage

12 VDC

Power Draw

2.16W

Max Air Flow

77 CFM (131 m³/h)

Static Pressure

3.16mm H2O (31 Pa)

Noise Level

33.5 dBA

Max Speed

2200 rpm (+/-10%)

Life Expectancy

50,000 hrs @ 40°C

Dimensions

120 x 120 x 25 mm

Performance graph shows Flow Rate (m³/h) vs. Pressure (Pa).

Thermal Grease: EK-TIM Ectotherm

Type

Low Viscosity

Electrically Conductive

No

Optimal Working Temperature

+100 to -50°C

Thermal Conductivity

8.5 W/mK

Density

3 g/cm³

Tubing: EK-Tube ZMT Matte Black 15.9/9.5mm

Material

EPDM

Color

Black, not UV-reactive

Dimensions

9.5mm/15.9mm (ID/OD)

Operating Temperature Range

-30°C to 110°C

Support and Service

For assistance, please contact:

http://support.ekwb.com/

EKWB d.o.o.
Pod lipami 18
1218 Komenda
Slovenia - EU

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