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Bykski full-cover copper and acrylic water block with aluminium backplate for XFX Radeon RX 6800 6900 XT Speedster Merc 319

Bykski

Bykski XFX 6900XT Water Block Speedster Merc 319 DIY Cooling

SKU CH-QR3A-DQE05

Full-cover liquid block directly cools GPU, memory and VRMs on XFX Radeon RX 6800 XT and 6900 XT Speedster Merc 319 cards

  • Fan sizeNo Fans
  • Product typeLiquid Cooling System
  • Full-coverage block cools GPU, VRAM and VRM directly
  • High-purity copper with electroplating resists oxidation
  • 5 V A-RGB lighting syncs with addressable motherboard headers
  • High-flow design supports parallel or serial multi-block loops
  • Compatible with XFX Speedster Merc 319 cards based on 6800 and 6900 PCB layouts

Bykski XFX 6900XT Water Block

This full-cover water block is built for the XFX Radeon RX 6800 XT and RX 6900 XT Speedster Merc 319 graphics cards. It cools the GPU, memory and VRM directly through a copper cold plate with an acrylic top. A 5V addressable RGB lighting controller and conversion cable are included in the package.

Suits builders with a compatible XFX Speedster

The block fits cards that share the specific PCB layout used by the XFX RX 6800 XT and RX 6900 XT Speedster Merc 319 models. Buyers with a different Radeon 6800 or 6900 board design should verify their PCB before ordering. It is not for air-cooled builds or graphics cards outside this compatibility list.

Copper cold plate with high-flow internal channels

The pure copper base is electroplated to resist oxidation and the internal layout supports high flow rates for serial or parallel loop configurations. An aluminum backplate is supplied but does not contact the coolant. The block handles the thermal load of the target GPUs at stock and elevated clocks; headroom depends on the rest of the loop.

How it compares

Measured against everything we stock in Heatsinks & Water Blocks, at today’s prices. Recalculated every night.

Price $154.99
Pricier than about 90% of the 609 comparable items (median $15.99).

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Specifications

Product
Product lineNo
Product typeLiquid Cooling System
Product colorNo
Size & build
Fan sizeNo Fans

Questions about this item

What graphics card must I already own for this block to fit?

It fits XFX Radeon RX 6800 XT Speedster Merc 319 and XFX Radeon RX 6900 XT Speedster Merc 319 cards; verify your exact PCB layout before buying.

Can I keep my existing fittings and tubing when installing this block?

The block uses standard G1/4 threads on its top and bottom ports so your current fittings and tubing will connect directly.

How do I confirm the A-RGB lighting is working correctly after installation?

Connect the 5 V A-RGB header to a compatible motherboard or controller; the LEDs should illuminate and respond to software control without flickering.

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