Bykski GPU Water Block and Backplate for Sapphire Radeon RX 7900 XTX Nitro+ (A-SP7900XTX-X)

Includes CNC backplate

In this gallery — tap to open full size

Bykski GPU Water Block and Backplate for Sapphire Radeon RX 7900 XTX Nitro+ (A-SP7900XTX-X)

4.6 (10) 4.6 out of 5 stars, 10 reviews Read the reviews

A-SP7900XTX-X Only 8 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 4 boards, and only these

This part is machined for the 4 boards listed below — nothing else. Board revisions and partner designs differ, so match your exact model against the list before you order.

SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XTX NITRO+ 24GB OC
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XTX PULSE 24GB
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XT PULSE 20GB OC
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XT PLATINUM 20GB OC

Not sure? Send us your model/part number and we'll confirm it for you.

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.

Confirm the hardware

This block fits 4 boards:

SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XTX NITRO+ 24GB OC
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XTX PULSE 24GB
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XT PULSE 20GB OC
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XT PLATINUM 20GB OC

Match your exact model — not the family.

Mount it dry

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

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

The Bykski A-SP7900XTX-X is a full-coverage GPU water block engineered for Sapphire Radeon RX 7900 series graphics cards. The nickel-plated T2 copper cold plate covers the GPU chip, while thermal pads transfer heat from the onboard memory and power stages into the cooling loop.

Replacing the stock air cooler with liquid cooling lowers sustained temperatures under heavy board power and eliminates fan noise from the system. A clear acrylic top displays coolant flow across the 0.3 mm micro-channels, and an aluminum backplate braces the circuit board.

In the box

GPU water block with backplate
Thermal pads
Thermal paste
Mounting hardware

If the gallery shows a parts diagram, that diagram is the source of truth for what ships.

Datasheet

Technical specifications 18 specs

Block Model	A-SP7900XTX-X
Cold Plate Material	T2 Copper
Cold Plate Plating	Electroless Nickel Plating
Plating Thickness	0.001 mm - 0.002 mm
Cold Plate Thickness	6.0 mm
Base Thickness Under Fins	0.35 mm
Cold Plate Length	175.5 mm
Micro-Channel Width	0.3 mm
Micro-Channel Count	44
Micro-Channel Surface Area	8871.47 mm2
Top Material	Clear Acrylic
Backplate Material	Anodized Aluminum
Backplate Finish	Sandblasted Matte
Block Dimensions	276.70 x 147.82 x 23.05 mm
Backplate Dimensions	276.70 x 117.15 x 6.00 mm
Port Thread	G1/4
Lighting	5V ARGB, 3-pin header
Lighting Sync Compatibility	ASUS Aura Sync, MSI Mystic Light, ASRock Polychrome, GIGABYTE RGB Fusion

What buyers said

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

More clear documentation would be nice but overall it's a pretty easy install if you have worked with water blocks before. Performs well knocked GPU temps from 75°C down to 45°C under full load.

Amazing performance

Fit perfectly and after plumbing up the cards own loop with a 480 radiator temps do not reach over 32c under heavy load while over clocked. Should have made the move to GPU water cooling sooner

GPU Waterblock RX7900XTX Nitro

Keeps the GPU cool as designed. Looks great.

Works Great!!!!!!!!!!

Overall great product and cools really good

Very nice

High quality and keeps my gpu cool for a good price

1 2

Questions people ask about this part

Answers specific to A-SP7900XTX-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 4 boards:

SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XTX NITRO+ 24GB OC
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XTX PULSE 24GB
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XT PULSE 20GB OC
SAPPHIRE AMD 7900 - AMD RADEON RX 7900 XT PLATINUM 20GB OC

Bykski cut these to a specific hardware layout, so match your exact model rather than the family before ordering. Part number A-SP7900XTX-X.

Is it in stock, and when will it ship?

Yes — only 8 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