Bykski Full Coverage GPU Water Block and Backplate for AMD Radeon RX 6900XT Founders Edition (A-RX6900XT-X)

Bykski Full Coverage GPU Water Block and Backplate for AMD Radeon RX 6900XT Founders Edition (A-RX6900XT-X)
Includes CNC backplate
In this gallery — tap to open full size
5.0 (2) 5.0 out of 5 stars, 2 reviews Read the reviews
A-RX6900XT-X Only 3 left in Boise, ID
$233.99USDFree shipping, lower 48

US import duties and tariffs are included in every price.

Ships the same business day on orders placed before 2:00 PM MST. Overnight delivery available at checkout.
Ships directly from our Idaho inventory. You avoid overseas sellers, processing delays, international shipping, customs hold-ups and additional fees.
Fits these 6 boards, and only these

This part is machined for the 6 boards listed below — nothing else. Board revisions and partner designs differ, so match your exact model against the list before you order.

  • AMD AMD 6950 - FOUNDERS EDITION RX 6950 XT
  • AMD AMD 6900 - FOUNDERS EDITION RX 6900 XT
  • AMD AMD 6800 - FOUNDERS EDITION RX 6800 XT
  • AMD AMD 6800 - FOUNDERS EDITION RX 6800
  • LENOVO AMD 6800 - RX 6800 XT
  • YESTON AMD 6800 - RX 6800 XT
Not sure? Send us your model/part number and we'll confirm it for you.
or ready to checkout now
Building your first loop? Plan the rest of it
Why buy it here
US warranty, handled in Boise
Claims are settled here, by the people who sold it to you.
Exclusive US distributor
The official US source for Bykski, so every part is genuine.

About this part

This A-RX6900XT-X full-coverage block directly cools the video card core (GPU), graphics memory (RAM), and voltage regulator modules (VRM). By directly cooling these components, you can achieve great temperatures and reach higher overclocks while extending the overall lifespan of your card by running at lower temperatures.

A high-flow design allows multiple blocks to run in series. The block can be configured as parallel or serial designs. In multi-block setups, an additional bridge may be needed, depending on your setup.

In the box
  • GPU Water Cooling Block
  • Installation Hardware, including thermal paste
  • 5v Addressable RGB (RBW)
  • (Warning: Addressable RGB (RBW) is 5V and is ONLY compatible with Addressable RGB (RBW) components. RGB is 12V and is ONLY compatible with RGB components. Mix and match will NOT work and will cause damage.
If the gallery shows a parts diagram, that diagram is the source of truth for what ships.
Datasheet
Block MaterialNickel Electroplated High Purity Copper / PMMA (Acrylic)
Backplate MaterialBlack Anodized Aluminum (not in contact with coolant)
SKUA-RX6900XT-X

What buyers said

Left by people who bought this part here. Compatibility reports are the useful ones — if you fitted it, say which board.

Customer Reviews

Based on 2 reviews
100%
(2)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
S
Stefanson F.
Perfect Experience

I had purchased a GPU waterblock from 2 different retailers and the first was the wrong item, second was lost after over a month of waiting. My third attempt was through Primochill and it arrived in less than 24 hours after ordering and was exactly what I ordered. I won't bother buying water cooling parts elsewhere going forward

S
Stefanson F.
Perfect Experience

I had purchased a GPU waterblock from 2 different retailers and the first was the wrong item, second was lost after over a month of waiting. My third attempt was through Primochill and it arrived in less than 24 hours after ordering and was exactly what I ordered. I won't bother buying water cooling parts elsewhere going forward

What installing it actually involves

Three steps, in the order that matters. The one people get wrong is the first.

01
Confirm the hardware

This block fits 6 boards:

  • AMD AMD 6950 - FOUNDERS EDITION RX 6950 XT
  • AMD AMD 6900 - FOUNDERS EDITION RX 6900 XT
  • AMD AMD 6800 - FOUNDERS EDITION RX 6800 XT
  • AMD AMD 6800 - FOUNDERS EDITION RX 6800
  • LENOVO AMD 6800 - RX 6800 XT
  • YESTON AMD 6800 - RX 6800 XT

Match your exact model — not the family.

02
Mount it dry

Thermal interface material as supplied. Even mounting pressure, correct bracket orientation, no over-torquing.

03
Leak test before power

Run the pump on a bench supply with the rest of the system unpowered. 24 hours is the standard, an hour is the minimum.

Custom water cooling is installed by you, at your own risk. We are not responsible for leaks, or for damage to your parts or system. If you're unsure at any step, ask before you power the loop.

Questions people ask about this part

Answers specific to A-RX6900XT-X. If yours isn't here, ask — we'd rather talk you out of the wrong part than sell you one.

What does this part fit?

It is machined for 6 boards:

  • AMD AMD 6950 - FOUNDERS EDITION RX 6950 XT
  • AMD AMD 6900 - FOUNDERS EDITION RX 6900 XT
  • AMD AMD 6800 - FOUNDERS EDITION RX 6800 XT
  • AMD AMD 6800 - FOUNDERS EDITION RX 6800
  • LENOVO AMD 6800 - RX 6800 XT
  • YESTON AMD 6800 - RX 6800 XT

Bykski cut these to a specific hardware layout, so match your exact model rather than the family before ordering. Part number A-RX6900XT-X.

Is it in stock, and when will it ship?
Yes — only 3 left in Boise, Idaho. Orders placed before 2:00 PM MST on a business day ship the same day — we do not ship weekends or US holidays. Overnight delivery is available at checkout.
Can I return it if it turns out not to fit?
Yes. Returns are accepted within 30 days and are easy to start in the support center. Unopened items can be returned for store credit with no restocking fee; other returns carry a restocking fee, higher for items that have been installed or used. So we would rather check the fit with you first: send us the model and we will check it against this part.
Will I pay import duties or customs charges on delivery?
Not on a US order. US import duties and tariffs are already included in the price, so nothing is collected at the door and there is no brokerage fee. Orders shipped outside the US may owe that country's customs fees and duties.
Who handles the warranty?
BYKSKI.US, the exclusive US distributor, from Boise, Idaho. Claims are handled domestically rather than returned to an overseas factory. Installation is at your own risk: we are not responsible for leaks or damage to other hardware.
Is shipping free?
Yes — shipping is included at this price for addresses in the lower 48 US states.
Are printed instructions included?
No printed manual is included. Installation references are in the product gallery images, and the install guides on this site cover the process step by step.
Do I need anything else to use it?
A water block is one component of a loop: you also need a pump, a radiator, fittings, tubing and coolant. If you are starting from nothing, an AIO or a distro-plate kit is the shorter route — ask and we will spec it.

Ask us before you order

Send your exact hardware model and we'll confirm the right part before you spend $233.99 — or tell you honestly that this isn't the one.

Returns are accepted within 30 days and are easy to start in the support center. Unopened items can be returned for store credit with no restocking fee; other returns carry a restocking fee, higher for items that have been installed or used.

Ask about compatibility