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Full-coverage GPU water block and black anodised aluminium backplate for XFX RX 6800 6900 XT Speedster Merc 319

Bykski

Bykski GPU Water Block Backplate XFX RX 6800 6900 XT Speedster Merc 319 Overseas Edition

SKU CH-ZPEB-77NBK

Full-coverage water block and backplate directly cool GPU, memory and VRM on XFX Speedster Merc 319 cards

  • TypeCPU Block
  • Full-coverage cooling for GPU, VRAM and VRM
  • Electroplated high-purity copper resists oxidation
  • Black anodised aluminium backplate adds rigidity
  • G 1/4 in. threads fit standard fittings
  • Compatible with XFX RX 6800/6900 XT Speedster Merc 319

Tailored Fit for XFX Speedster 319

This full-coverage water block and backplate kit is engineered for the XFX RX 6800 XT and RX 6900 XT Speedster Merc 319 graphics cards. It targets enthusiasts building a custom liquid-cooling loop who want to replace the stock air cooler on these specific board designs. The electroplated copper cold plate contacts the GPU die, memory modules, and VRM array simultaneously.

Replaces the Factory Air Cooler

The block removes the original heatsink and fan assembly, moving heat directly into your loop for lower operating temperatures and quieter operation. The upgrade is worthwhile when you plan to push higher sustained clocks or simply want to eliminate the stock cooler's noise profile. A high-flow internal channel design supports running multiple blocks in series without excessive restriction.

Verify PCB Version Before Ordering

Compatibility is limited to the Version 1 circuit board used on the Speedster Merc 319; other revisions will not mount correctly. Compare your card's bare PCB against the reference gallery images to confirm the layout matches exactly. The kit uses standard G 1/4 inch threads, so ensure your existing fittings and tubing match that thread size.

Highlights

  • Full-coverage cooling for GPU, VRAM and VRM
  • Electroplated high-purity copper resists oxidation
  • Black anodised aluminium backplate adds rigidity
  • G 1/4 in. threads fit standard fittings
  • Compatible with XFX RX 6800/6900 XT Speedster Merc 319

Specifications

TypeCPU Block

Questions about this item

Does the block mount to the XFX RX 6800 XT Speedster Merc 319 Version 1 PCB?

Yes, this full-coverage block is built for the XFX RX 6800 XT Speedster Merc 319 Version 1 board and the RX 6900 XT Speedster Merc 319; verify your PCB against the reference image before ordering.

Which ports do I connect for a single-loop install?

Use the G 1/4 in threaded ports on the top or bottom of the acrylic terminal; either pair works for inlet and outlet in a standard series loop.

Will the black anodized aluminum backplate need replacement if the thermal pads degrade?

The backplate does not contact coolant and is not a wear item; only the thermal pads between it and the VRM or memory may need refreshing after extended use.

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