Bykski Durable All Metal GPU Water Block and Backplate For GIGABYTE GeForce RTX 4090 WindForce V2 24G (N-GV4090WF-X-V2) - Continuous Usage

Includes CNC backplate

In this gallery — tap to open full size

N-GV4090WF-X-V2 Only 5 left in Boise, ID

$287.99USDFree shipping, lower 48

US import duties and tariffs are included in every price.

Want it as a sealed kit?

This block with radiator, pump and fans, pre-filled and sealed. No loop to build.

360 All-in-One (AIO), 3 x 120mm fans B-FRD-GV4090WF-X-V2-360 $549.99See the kit →

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 2 boards, and only these

This part is machined for the 2 boards listed below — nothing else. Board revisions and partner designs differ, so match your exact model against the list before you order.

GIGABYTE NVIDIA 4090 - GEFORCE RTX 4090 WINDFORCE V2 24GB
GIGABYTE NVIDIA 4090 - GEFORCE RTX 4090 TURBO 24GB

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

Fittings for this block

PrimoChill SX fittings for the G1/4 ports, in stock in Boise. Pick a finish and how many you need; 6+ in any mix and the price drops.

1/2in. Rigid RevolverSX Series Fitting

$7.99 ·

SecureFit SX - 3/8in ID x 5/8in OD Flexible Tubing

$8.99 ·

Male to Female G 1/4in. 90 Degree SX Rotary Elbow Fitting

$11.99 ·

Pick a finish, then add quantities.

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.

Custom watercooling since 2002

PrimoChill, from Boise, Idaho.

About this part

The Bykski N-GV4090WF-X-V2 is a full-coverage GPU water block with backplate for GIGABYTE GeForce RTX 4090 WindForce V2 24G and Turbo cards. It cools the GPU chip, memory, and power stages in one pass.

Built for continuous operation, the block routes heat away from the board and into your cooling loop. A 0.35 mm T2 copper base with 44 micro-channels at 0.3 mm pitch transfers heat through 0.001-0.002 mm electroless nickel plating. The included aluminum backplate reinforces the card during 24/7 deployment.

In the box

GPU water block with backplate: 1 pc
Aluminum Backplate: 1 pc
1.5mm Thermal Pad: 5 pcs
0.5mm Washers: 4 pcs
M2 x 5mm Coil Spring Screws: 4 pcs
M2 x 9.5mm Backplate Screws: 7 pcs
Thermal paste: 1 pc

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

Datasheet

Technical specifications 14 specs

Product Model	N-GV4090WF-X-V2
Base Plate Material	T2 Copper
Base Plate Plating	Electroless Nickel Plating (0.001 - 0.002 mm)
Top Panel Material	Nickel-Plated Copper
Backplate Material	Anodized Aluminum
Water Block Dimensions	271.0 x 124.7 x 18.6 mm
Backplate Dimensions	247.5 x 104.8 x 4.0 mm
Base Plate Thickness	0.35 mm
Copper Base Length	174.8 mm
Micro-Channel Fin Pitch	0.3 mm
Micro-Channel Fin Count	44
Micro-Channel Surface Area	12057.966 mm2
Port Thread	G1/4
Warranty	1 year

Not sure this is the one?

Sealed kit, or just the block

Same cold plate, two ways to buy it, and what happens if you keep the cooler the card shipped with.

	The All-in-One (AIO) kit B-FRD-GV4090WF-X-V2-360	This block N-GV4090WF-X-V2	Stock cooling As the card ships
You already have	A case with a 360 mm radiator mount. Nothing else.	A working water-cooling loop: pump, radiator, reservoir, fittings, coolant.	The card and the cooler it came with: a passive fin stack or a small blower, built to be fed by a server's front-to-back airflow.
Day one	Remove the stock cooler, install the pads and the block, mount the radiator. Done.	Same block install, then plumb it into your loop, fill and bleed.	Plug it in. In a rack with a cold aisle it runs as designed. In a workstation or desktop case, nothing pushes air through the fin stack.
Serviceable	Sealed. Nothing to fill, bleed or top up.	Every part, because it is your loop.	Nothing to service, and nothing to improve: the cooler can only move the heat the case pushes through it.
Best for	Servers and workstations that need it running this week.	A build that already has water in it.	The rack it was designed for. Not a desktop, a workstation or an open bench, where it throttles under sustained load.
Where to buy it	$549.99 · See the kit	This page	You already own it.

What buyers said

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

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 2 boards:

GIGABYTE NVIDIA 4090 - GEFORCE RTX 4090 WINDFORCE V2 24GB
GIGABYTE NVIDIA 4090 - GEFORCE RTX 4090 TURBO 24GB

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.

Questions people ask about this part

Answers specific to N-GV4090WF-X-V2. 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 2 boards:

GIGABYTE NVIDIA 4090 - GEFORCE RTX 4090 WINDFORCE V2 24GB
GIGABYTE NVIDIA 4090 - GEFORCE RTX 4090 TURBO 24GB

These are machined to a specific hardware layout, so match your exact model rather than the family before ordering. Part number N-GV4090WF-X-V2.

Is it in stock, and when will it ship?

Yes — only 5 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?

PrimoChill, from Boise, Idaho. Every claim is handled directly by our support team 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 $287.99 — 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