Bykski Full Coverage GPU Water Block and Backplate for Gigabyte RTX 3080/3090 (N-GV3090GMOC-X)

Availability : In stock, In Boise ID USA Pre-Order Now Out of stock
$179.99 USD
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The Bykski Full Coverage GPU Water Block and Backplate for Gigabyte RTX 3080/3090 is a work of art! This full coverage block directly cools the video cards core (GPU), graphics memory (RAM) as well as the voltage regulator modules (VRM). By directly cooling these components you can achieve great temperatures! Along with these temperatures comes 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 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 set ups.

  • Finest Craftsmanship
  • Designed to Fit Standard G1/4 Thread Fittings
  • SLI/Crossfire Compliant
  • Model: N-GV3090GMOC-X
  • Brand: Bykski
  • Block Material: Electroplated High Purity Copper / Clear Acrylic
  • (Including but not limited to the following models)
  • Gigabyte RTX 3080 GAMING OC 3X 10G
  • Gigabyte RTX 3080 EAGLE OC 10G
  • Gigabyte RTX 3080 VISION OC 10G
  • Gigabyte RTX 3090 GAMING OC 24G
  • Gigabyte RTX 3090 EAGLE OC 24G
  • Gigabyte RTX 3090 VISION OC 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 replace only item. Returns not accepted on compatibility issues or 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.

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
Saxe Saaby

I am looking so forward to this becuase i had a front covered one, but it needed to be repaired and then the repair shop lost some screws so i can't put it together again.
This will hopefully take care of the little toasty memory on the back. 89 degrees is beginning to get a little toasty.
I hopw you all get what you are here for and whish you all the best.

Best Regards

Bryce Wilkinson
Incorrect Thermal Pads - No Instructions Provided

So, this waterblock looks very nice, however it was not making proper contact with the GPU at all, due to the thermal pads being too thick. I was forced to re-use thermal pads for the time being from my stock cooler to try to get this waterblock to work, even then, my temps still run into the 80's. The thermal pads werent cut, all just default length. When buying a previous waterblock with a competitor, they had sent me 3 different baggies of 3 separate thermal pads, already pre-cut to fit perfectly, and instructions showing where to put each size of pad. This was not the case with this waterblock unfortunately. Going to try to reach out to customer support to get this resolved.

Using a Gigabyte 3080 Vision OC.

Pleasantly Surprised

Overall great block and it's light. Came from a history of using EK blocks seeing low 40C on 980TI and 1080TI cards, so this was a good surprise. Initial installation was pushing 57C, and it turned out the standoffs around the die mount were not fully tightened. After tightening them, was able to drop temps down to mid 40's, well in line with expectation. So far, after about 5 months, no peeling on nickel plating yet so that's great.

Calvin Schubert
Fantastic Full Coverage Waterblock!

So far this has been an excellent block. Idle temps for me are 10C above ambient and it never got above 65C during my long term stress tests. There is another review here that's totally incorrect. this is in fact a full coverage waterblock. There never was or will be a gpu waterblock that covers both sides of the PCB, it cools the memory through the board and they provide thermal pads that connect to the back plate.

Misleading Specs..

Claims that it's "Full Coverage" and "This full coverage block directly cools the video cards core (GPU), graphics memory (RAM) as well as the voltage regulator modules (VRM)" when in reality the 3090 card has memory on it's back as well, and that part is STILL only covered by a backplate. The 3090 card needs active cooling on both sides.

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 20 days of invoice date and a 15% restocking fee will apply. If 20 days have gone by 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 expense of the customer. Customer will be responsible for paying shipping products/orders back to Shipping costs are non-refundable. 

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

If a shipped order is refused or returned undelivered there will be a mandatory 20% restocking fee, a $20.00 Return Service Fee and no refund on the shipping cost. Please be aware that refusal is significantly more expensive then using your own carrier and is NOT recommended.Please note: Refusal of packages due to duties and taxes will still result in brokerage fees and return shipping costs to us being deducted from your refund. These fees are usually higher than what paying the initial fees would have been.


Shipping Policy

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



Any and all orders over $100.00USD that are cancelled will have a 10% restock fee assessed, unless an in-store credit is issued for future purchases, then the restock fee is waived. Please double check your orders before checkout! Combining of orders/changes of orders is not permitted and cancelling and re-order will place your order to the back of the queue. We offer heavily discounted shipping rates to offset any additional items you may need. We will not refund shipping costs for any reason.