Bykski Full Coverage GPU Water Block and Backplate for Gigabyte RTX 4090 Windforce 24G (N-GV4090WF-X)

Availability : In stock, In Boise ID USA Pre-Order Now Out of stock
$194.99 USD
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This full coverage block directly cools the video cards core (GPU), graphics memory (RAM), and voltage regulator modules (VRM). By directly cooling these components, you can achieve great temperatures along with the ability to reach higher overclocks or extend the overall lifespan of your card by running at below factory temps.

The block is constructed of high-purity copper that is nickel electroplated to prevent oxidation. A high-flow design is used to allow multiple blocks to run in series. Top and bottom ports can be used to configure parallel or serial designs in multi-block setups.

  • Block Material: Nickel Electroplated High Purity Copper / Acrylic
  • Backplate Material: Black Anodized Aluminum (not in contact with coolant)
  • (Including but not limited to the following models)
  • Compatible with Gigabyte RTX 4090 Windforce 24G
  • Please check over the entire PCB picture after narrowing your selection to ensure compatibility. If you have any questions, please contact support for confirmation.
  • Compatibility based on these circuit board designs only
  • Fittings: G 1/4in. Thread
Parts Included
  • 1x Full Coverage GPU Water Block
  • 1x Backplate
  • 2x Stop Fitting
  • 1x Mounting Hardware
  • Thermal grease
  • 1x 5v A-RGB (RBW) Light
  • (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.

This is a repair or replacement-only item. Returns are not accepted on compatibility issues or if the block has had water/fluid run through it.

The manufacturer reserves the right to alter the block design to expand compatibility. The delivered item may not 100% match the pictured item. The product does NOT come with English instructions. Please see the product gallery images for the install guide if available. Generally, thermal pads should be installed on the card where the block has corresponding raised contact points, except the GPU core, which uses thermal paste. Installing pads on other components can lead to improper contact and poor performance.

Not responsible for any damage caused by or when using this product. Please use it at your own risk.

Reviews | Q&A

Customer Reviews

Based on 3 reviews
Requires filing before assembly

If you assemble this without filing of the front standoff of the waterblock, this standoff pushes the **** that attaches the card bracket to the card itself and dangerously bends the card PCB. Even after filing I still can't achieve good attachment of the waterblock to the GPU and my delta between water and GPU is about 50C now under FurMark load. More filing required.

Michael W.
Also works with Aorus WaterForce Extreme 4090

Great Item. Was looking to replace the AIO for my Aorus Water force 4090 and did not see a single water block that would fit. Seen a Reddit page saying the WindForce and Water force 4090 pcb were very similar. Went out on a limb and purchased this product. Received the item and was packaged well for that long trip to states. Item looked very nice and protective wrap covered the item. I had already disassembled my Water force which took about 10-15 minutes. Installed the block to pcb in accordance with the instructions that came with email and posting on the page. Came with all the thermal pads and small tube of paste. I had just recently opened some thermal grizzly so that is what i actually used along with provided thermal pads. All in all took about 15 minutes. Once i got installed on the system and water flowing, I did some stress testing to make sure everything was good. Thermals on my board were a little better and i used the auto overclock in Gigabyte Control Center to push the card. My board was already water cooled so i kinda figured it was going to be very similar to my previous thermals. Also I have a way bigger pump and radiator set up then the AIO that comes with water force. I am extremely happy with my results and overall satisfied with the purchase. I will say a couple of things which I don't like but are not unbearable the Pcb is not fully covered by the Acrylic which is also due to the fact that my board is a wateforce not a windforce. When installing backplate i did have to remove one of the standoffs from pcb once again possible due to my board not actually being a windforce.
Looks good RGB/Clear Acrylic. Packaged Well.

Does what it needs to do. Excellent for ITX builds.

Idles at 32c. Gaming never breaks 57c. Ran Port Royal 5x and the nighest it got was 68c. Just as good, if not better than all the other brands. Did drop my temps by 10-15c depending on the task.

Return/Exchange/Shipping Policy

Return Policy for New Products:

For international customers please reference this page for duties/tax information.

Products returned for credit must be received within 30 days of the invoice, and a 15% restocking fee will apply. If your order was sent using "free shipping," the amount for outbound shipping will be deducted from your refund. If 30 days have passed since your purchase, unfortunately, we can’t offer you a refund or exchange.

All returned items must be in like new condition with all related parts including screws, manuals, etc. If you have lost, thrown away, scratched or opened sealed boxes or bags – a higher restock fee may apply upwards of 50%.

If a customer is misleading about the defect and evidence of incorrect install/use or tampering has occurred, a higher restock fee may be assessed or the return may be completely denied. A qualified technician will test each returned product for defects. will not assess a restocking fee for defective products.

Sale items  or Pre-owned (if applicable)
Only regular priced new items may be refunded or returned, unfortunately sale items and Used/Pre-owned/Open box items cannot be refunded.

Returns will not be accepted without an RMA number provided from 

Return Shipping

Customers are responsible for ALL return shipping charges on merchandise for any reason. Unless otherwise noted, shipping on products and returns is non-refundable, and returning a product comes at the customer's expense. The customer will be responsible for paying for shipping products/orders back to For no reason, do we refund the outbound shipping cost. If your order was sent using "free shipping," the amount for outbound shipping will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

Please ship using a carrier that provides a tracking number, insurance and proof of delivery. is not responsible for return items lost by the carrier. Valid proof of delivery must include the receipt signature of an authorized employee.

Erroneous Shipments
In the event an incorrect item is shipped in your order, the correct item / replacement will be shipped using the same method as the original order.

Damaged Items
:  All packages are fully insured at no additional charge.

If you receive a damaged package, you must notify us within 48 hours of receipt. Sending back damaged merchandise voids the shipping insurance and no credit will be given. Damaged packages must be held for five days with original packaging for carrier inspection.

Shipment Refusal

Shipping Policy

Selecting overnight shipping method will not ensure that your order ships same day and is not guaranteed.


Once an order is placed on our e-commerce website, it cannot be canceled/changed or held. This is because our fully automated systems immediately start processing the order, which cannot be stopped or reversed. Therefore, we advise customers to double-check their orders before making a purchase.

Additionally, we would like to emphasize that our e-commerce website ships 98.5% of orders on the same day they are placed by 2:00 pm MST. Allowing cancellations after an order is placed would significantly slow down our shipping process and potentially affect the delivery times for other customers.

We understand that it can be frustrating to be unable to cancel an order, but we ask for your understanding in this matter. By adhering to our cancellation policy, we can ensure that our automated systems and shipping processes continue running smoothly, allowing us to provide fast and efficient service to all our customers.

We understand that sometimes mistakes can happen, and customers may accidentally order the wrong item or change their minds about a purchase. In such cases, we suggest that customers consider our return policy instead.


Most of the time pre-ordered items are newly released products and may be subject to price increases and feature changes as more information is provided to us the reseller. 

The item's packaging (dimensions, weight, additional handling, shipping rate changes), delivery schedule and included options are subject to change and therefore the original estimated price listed and delivery date may change once the final information is received. As we get more information about the packaging, pricing, and inclusions, the final features/pricing may change before fulfillment. 

In the event of a price change or feature change the customer will be notified immediately and will be given the option to cancel the order, change the order or pay additional funds to cover the increases.