Bykski GPU Backside Water Block for Nvidia RTX 3090 Video Memory (B-3090TC-X)


SKU: B-3090TC-XN/AAvailability : In stock - In Boise, ID USAIn StockOut of stock

This universal RTX 3090 VRAM block directly cools the video cards graphics memory (RAM) located on the backside of the card. Most stock backplates are inadequate cooling solutions for this area.... Read more


Order in the next to get it between and hoursminutes

This universal RTX 3090 VRAM block directly cools the video cards graphics memory (RAM) located on the backside of the card. Most stock backplates are inadequate cooling solutions for this area. By directly cooling these components the cards overall performance and stability will be more stable.

The block is constructed of high purity copper that is electroplated to prevent oxidation.

  • Block Material: Electroplated High Purity Copper / Clear Acrylic
  • (Including but not limited to the following models)
  • All Series Nvidia RTX 3090
  • *other series such as 3080 3070 2080, etc. are not compatible
  • This product is not compatible with the backplate of Bykski X series GPU block!
  • If you using the Bykski GPU block, please install it directly on the back of the PCB, or use stock backplate.
  • Please check over the installation 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 Universal Backside Water Block for RTX 3090 Video Memory
  • 1x Mounting Hardware
  • Thermal pads

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.

The PCB, top block and backplate shown in this product picture are for reference and display purposes only.

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

Customer Reviews

Based on 1 review
Daniel K.
Does the Job

Shipped and got to me very quickly. Easy to install. I'm slightly disappointed with performance:

I bought the Bykski EVGA 3090 FTW3 ultra gaming water block with backplate (not active back plate) without doing much research. I found out that if I strapped a heatsink to the backplate of that water block and put a case fan on it the memory temperature dropped 4-6 degrees while mining. When I saw this backside water block for the 3090 I decided to try it so that I could remove the heatsink/case fan eye sore from my case. It does about as well as cooling as that set up. I was expecting more. It does the job though.

Shipping Policy:

We ship via USPS and Fed Ex . For international orders we ship via Fed Ex and DHL. Air shipments will be delivered on the normal business day scheduling provided via the selected carrier. Unfortunately we are not able to ship out orders for specific Saturday deliveries. During peak season carriers suspend their delivery guarantees and delays are common.

Same Day Shipping:
We strive to ship out every order same day if the order is placed by 2:00pm MST. If not, the order will ship out the next business day. Orders with custom powder coating (SX Colors) can take up to 1-4 business days to coat, inspect and pack so please be aware of this. Selecting overnight shipping method or rush fee will not ensure that your order ships same day and is not guaranteed.

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. 

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 ten days with original packaging for carrier inspection. All packaging and packing materials must be kept for this inspection.

If your package is marked delivered and not received, please contact immediately for further assistance.

International Shipping:

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

Returns Policy for New Products:

RMA Number:
Returns will not be accepted without an RMA number provided from

Product Return:

Products returned for credit must be received within 30 days of invoice date and a 15% restocking fee may apply. If 30 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%. Products that have had fluid ran through them are subject to these higher restock fees.

Only regular priced items may be refunded, unfortunately sale items cannot be refunded this includes B-Stock and Used/Open Box Products.

If a customer is misleading about the defect and evidence of incorrect install/use or tampering has occurred, the return my denied and 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.

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 For no reason do we refund the outbound shipping cost.

Not enough items available. Only [max] left.
Shopping cart
Free Shipping for all orders over [money]
Add [money] more to get FREE SHIPPING! (US Customers Only)
Congratulations! You've got free shipping! (US Customers Only)

Your cart is empty.

Return To Shop

Add Order NoteEdit Order Note
Estimate Shipping
Add A Coupon

Estimate Shipping

Rush your order processing? Only


Add A Coupon

Coupon code will work on checkout page

Bykski GPU Backside Water Block for Nvidia RTX 3090 Video Memory (B-3090TC-X)