Exclusive US distributor

Cooling for the hardware you already own

Full-coverage GPU and CPU water blocks, each made for an exact card or socket, stocked in Boise, Idaho. US import duties and tariffs are already in the price.

MST dispatch cutoff
2:00 PM
day returns
30
ships and warranties here
Boise, ID

Build planner

Planning your first water cooling loop?

Pick a CPU block, GPU block, radiator, pump and tubing one step at a time. We work out the fans and fittings you need, then add the whole loop to your cart in one click.

Open the build planner
Bykski full-coverage RGB GPU water block for the ASUS TUF RTX 4090
Building a loop

Find the block for your card

Each block is made for one exact card, so compatibility goes by your exact model, not the product family. Tell us what you own and we'll confirm the part.

  • Full-coverage GPU blocks, 377 models
  • Sealed AIO kits — nothing to bleed
  • Distro plates, radiators, fittings, coolant
Bykski external radiator unit plumbed into a rack server
Speccing a rack

Cooling that runs at full load all day

Continuous-usage parts for EPYC, Xeon and Threadripper sockets, RTX PRO Blackwell cards and Tesla-class accelerators. Purchase orders and tax exemption supported.

  • 2U and 4U server AIOs, filled and bled
  • Datacenter GPU blocks, all-metal builds
  • POs, W-9 on request, quantity lead times
No single part does it all.

Browse the catalogue

Each category serves a particular purpose, and most components are machined for a specific case, card or socket. Compatibility goes by your exact model, so check it before you order.

Compatibility is the whole job

Know the hardware, not just the name

Two cards with the same model name on different circuit boards need different blocks. Send us the exact model and we'll confirm the part before you order — or tell you honestly that we don't make it.

Send a photo of the bare board, or the case and the position you want a plate in. Answered in Boise within two business days, Monday to Friday, Mountain Time.

What to send
01
A photo of the bare board
Cooler off, whole PCB in frame. This is what compatibility is actually judged on.
02
The case, and the position
For a distro plate. One case often has more than one plate, and they are not interchangeable.
03
Your loop metals
Aluminum or copper. Mixing the two in one loop is the failure we see most.
Why buy it here

Why bykski.us

Genuine Bykski stock, held here in Boise. You avoid overseas sellers, customs hold-ups and the processing delays that come with them.

Free shipping over $125

To the lower 48 US. Overnight available at checkout.

30-day returns

Easy to start in the support center. Unopened items can come back for store credit with no restocking fee.

US support, not a factory ticket

Answered in Boise, Idaho — Mountain Time.

About Bykski water cooling

Bykski has built water-cooling components since 2002, across an unusually wide range of hardware — including AIB card variants, workstation cards and compute accelerators that Western brands never cut a block for. BYKSKI.US is the exclusive US distributor: stock held in Boise, Idaho and warrantied here.

Because each full-coverage block is made for an exact card, compatibility goes by your exact model rather than by chip. That is the one thing worth checking before you order, and the thing we would always rather confirm for you first.

Bykski CPU water blocks