Bykski Full Coverage GPU Water Block and Backplate for Sapphire NITRO+ AMD Radeon RX 7800 XT 16GB (A-SP7800XT-X)
Includes CNC backplate
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Bykski Full Coverage GPU Water Block and Backplate for Sapphire NITRO+ AMD Radeon RX 7800 XT 16GB (A-SP7800XT-X)

4.5 (2) 4.5 out of 5 stars, 2 reviews Read the reviews
A-SP7800XT-X Only 2 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 one thing, and only one

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

  • SAPPHIRE AMD 7800 - NITRO+ RADEON RX 7800 XT 16GB
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.

What installing it actually involves

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

01
Confirm the hardware

SAPPHIRE AMD 7800 - NITRO+ RADEON RX 7800 XT 16GB — the exact model, not the family. Partner boards differ.

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.

About this part

This A-SP7800XT-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-SP7800XT-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
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Adam S.
Super Cool!! (pun intended)

I had been looking for a water block for my Sapphire Nitro+ RX 7800XT GPU for a long time. I learned that AMD water blocks are not as prevalent as other GPU manufacturers. I had heard of Bykski while I was a user of other vendors GPU's, but never thought much of it. Well, the joke was on me because this Bykski water block is fantastic! The block is well manufactured and frankly has turned my GPU into an ice block compared to running out of the box. My GPU hotspot is actually 5-8 degrees cooler than the core, even at load. The instructions were easy to follow and provided the proper thickness of the pads and placement. PAY ATTENTION to this and use the correct thickness pads, IT DOES matter. My temps on the stock fans, which to be fair were quality fans, were mid to high 60's under load. With the Bykski water block they hit 56 under load and just seem to stay there. The GPU is running so much cooler and I was able to get rid of the AMD Adrenalin software (I only used it for fan curves), which has sped up my system and stopped a lot of hanging and crashing in certain games.

Overall, this water block is the best money I have spent on my PC in years. I have been water cooling for almost a decade now and Bykski has earned a place at the top of my list for water blocks. I am a very satisfied customer!

L
Larry H.
Sapphire Nitro+ RX 7800xt watter block

Nice looking water blocks for the money. They seem to work but I can't say for how long or how well they do at this time. RGB looks good with solid colors but not so much with a rainbow pattern. The different colors show the gaps between the RGB lights. Overall I would recommend these to everyone with a wattercoold system.

Questions people ask about this part

Answers specific to A-SP7800XT-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 SAPPHIRE AMD 7800 - NITRO+ RADEON RX 7800 XT 16GB. Bykski cut these to a specific hardware layout, so confirm the exact model rather than the family before ordering. Part number A-SP7800XT-X.
Is it in stock, and when will it ship?
Yes — only 2 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