Bykski Full Coverage GPU Water Block and Backplate for Asrock RX6900 XT OC Formula 16G (A-AR6900XTOCF-X)

Availability : In stock, In Boise ID USA Pre-Order Now Out of stock
$189.99 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.

  • (Including but not limited to the following models)
  • ASROCK Radeon RX6900 XT OC Formula 16G
  • 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 replace only item. Returns not accepted on compatibility issues or if block has had water/fluid run through it.

Manufacturer reserves right to alter block design to expand compatibility. Delivered item may not 100% match pictured item. Product does NOT come with English instructions. Please see product gallery images for install guide if available. Generally, thermal pads should be installed on the card where the block has corresponding raised contact points with the exception of 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 at your own risk.

Reviews | Q&A

Customer Reviews

Based on 5 reviews
Great product worked as expected

This was the most nerve wracking part of my first custom water cooling rig since there are so many video card makers. I have the Asrock RX6950 XT OC Formula card and had to confirm that this product would fit. Customer support was able to answer my question. The only thing I'd like to see improved is the documentation. The documentation was really fine print and I end up looking up my disassembly on YouTube and previous reviewers for tips to install properly.

Installation aside, the working system is pretty. I have it hooked into my MB ARGB sync.

Great water block

Took awhile to receive water block but customer service was top notch about keeping me in the loop. As for the water block itself performs excellent. Keeps my AsRock 6950 OCF at 50c core 72c hotspot overclocked @ 2920mhz core, 2400mhx memory @ 1.225v and 20% power boost with MPT. Great product!

Works perfectly, thermal pad layout very important.

The block is fantastic, there was a little bit of oil residue inside the block that I had to clean out before installing it, though anyone doing a custom loop should flush their equipment first. The thermal pads didn't have much explanation but I can give a good breakdown here:

You can not use ANY of the stock thermal pads on the front of the PCB, you MUST use the ones included with the block and only put them in the exact locations as the directions state. Nowhere else. However, you can reuse the stock thermal pads on the back of the PCB for additional memory/VRM cooling. They fit nearly perfectly and there is no PCB flexing or bending when you use the stock thermal pads underneath the backplate.

Just to reiterate, you need to use the thermal pads that are included with the block on the front side of the PCB, but you can use the stock thermal pads that are included with the GPU on the back side of the PCB.

Other than some minor confusion with the thermal pads, everything else is perfect, the fit is great and the mounting pressure is very even. Keeps my ASRock 6950XT OC Formula nice and chilly. Able to sustain 2.75GHz on the core and 2.35GHz on the memory. GPU average temp typically sits around 42c and hotspot around 56c under full load at +20% power target & 1.2v Vcore. Smokes the 3090 in most games and typically matches the 3090Ti in non-raytraced games. Very, very happy!

Brandon W.
Thermal Pad thickness

Water block is great. Cools well and fits perfect however, thermal pads that were provided were not the correct thickness and additional pads were needed for proper contact between gpu and cooler.

Hi Brandon,
Sorry to hear you had difficulties with the thermal pads. We'll be happy to help work out any problems if you reach out to us at

David I.
Great looking gpu water block

Beautiful and functional I love it

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.