Bykski CPU-7529-SR Durable Metal CPU Water Cooling Block for Intel Xeon 6 (LGA 7529)

Bykski CPU-7529-SR Durable Metal CPU Water Cooling Block for Intel Xeon 6 (LGA 7529)
In this gallery — tap to open full size
CPU-7529-SR Pre-order
$139.99USDFree shipping, lower 48

US import duties and tariffs are included in every price.

Ships directly from our Idaho inventory. You avoid overseas sellers, processing delays, international shipping, customs hold-ups and additional fees.
Pre-order — normally stocked
Expect dispatch in about 20 business days
Latest 24 business days. Cancel any time before it ships for a full refund.
A regular catalog item — we're between shipments. Your order is filled before any stock goes back on the website.
What this works with

Check these against your build before you order. If anything here does not match what you have, ask us first — it is cheaper than a return.

  • INTEL XEON 6 - 6900 (Xeon 6 6980P)
Not sure? Send us your model/part number and we'll confirm it for you.
Which socket is my CPU? Find your CPU's generation and read the socket and the mounting pattern.
Not ready to pre-order?
Fittings for this block

PrimoChill SX fittings for the G1/4 ports, in stock in Boise. Pick a finish and how many you need; 6+ in any mix and the price drops.

Pick a finish, then add quantities.
Building your first loop? Plan the rest of it
Why buy it here
US warranty, handled in Boise
Claims are settled here, by the people who sold it to you.
Custom watercooling since 2002
PrimoChill, from Boise, Idaho.
Bykski CPU-7529-SR Durable Metal CPU Water Cooling Block for Intel Xeon 6 (LGA 7529)
0.3 mm wide micro-channelsNickel-plated copper
CPU block

One copper plate.

A copper water block for a custom loop. Check the compatibility list below against the socket on your motherboard before you order.

65
Micro-channels
0.3 mm
Channel width
G1/4
Ports
The part that touches the CPU

65 channels, each 0.3 mm wide

Nickel-plated T2 copper, aluminum and brass top.

The channels are machined into the copper base. Coolant enters over the center of the plate, directly above the hottest part of the chip, and spreads out through the channels to both sides.

The nickel finish keeps the copper from tarnishing in the loop.

Compatibility is decided by the socket, not the chip name

Check the socket on your board

The block fits the sockets in the compatibility list on this page and nothing else. Look up the socket for your motherboard, not the processor's name. Which socket is my CPU?

The one mistake that costs temperature

The inlet is marked. Use it.

The two ports are not interchangeable. Coolant has to go in through the inlet so it lands on the center of the plate. Plumbed the wrong way round, the block still works but runs warmer, and nothing about it looks wrong.

Both ports are standard G1/4, so any G1/4 fitting fits.

About this part

The Bykski CPU-7529-SR is a CPU water block for workstation and server builders who want to run a large Xeon in a custom loop. It fits Intel Xeon 6 6900-series processors, such as the Xeon 6 6980P, on the LGA 7529 socket. The block has a nickel-plated T2 copper cold plate under a black anodized brass and aluminum top.

These processors can run at full core count for hours, so the cooler has to keep up. The cold plate's 65 micro-channels give the loop a large copper surface to pull heat through. That moves heat straight into your radiators, so you do not have to rely on chassis airflow, and the all-metal housing suits a machine that stays on around the clock. The micro-channels are each 0.3 mm wide.

In the box
  • CPU Water Cooling Block
  • Installation Hardware, including thermal paste
If the gallery shows a parts diagram, that diagram is the source of truth for what ships.
Datasheet
Technical specifications 18 specs
Product ModelCPU-7529-SR
Product TypeCPU Water Block
Socket CompatibilityIntel LGA 7529
Processor CompatibilityIntel Xeon 6 (Any 69xx)
Cold Plate MaterialT2 Copper
Cold Plate PlatingElectroless Nickel Plating
Plating Thickness0.001 mm - 0.002 mm
Cold Plate Thickness0.35 mm
Top MaterialBrass and Aluminum
Top FinishAnodized Black
Micro-Channel Count65
Micro-Channel Width0.3 mm
Micro-Channel Surface Area32726.4007 mm2
Dimensions126.70 x 97.70 x 21.99 mm
Weight0.6 kg
ThreadG1/4
Working Pressure6.0 bar
Manufacturer Warranty3 Years
The second fit question

Check the space around the socket

Fitting the socket is the first question. The second is whether the block has room: it measures 126.70 x 97.70 x 21.99 mm (width includes ports). Check what sits next to the socket on your board.

The usual problem is an M.2 heatsink right beside the socket. The first memory slot and tall heatsinks around the socket are the next things to check.

Length x width x height126.70 x 97.70 x 21.99 mm (width includes ports)
Port threadG1/4
Check firstM.2 heatsink by the socket
Installing it

Four things decide your temperatures

  1. 01Clean the CPU and the plate, and peel the film. Isopropyl on both until they are dry. Protective film left on the base is the most common cause of a block that "doesn't work".
  2. 02Paste on the CPU, not a pad. A pea-sized dot on a desktop CPU. Thin lines from edge to edge on Threadripper, EPYC and Xeon, where a single dot misses the outer chiplets.
  3. 03Tighten in a cross pattern, finger tight. A turn at a time on each screw. Over-tightening can crack the top or bend the socket's retention frame.
  4. 04Inlet to the inlet, then leak-test before power. Run the pump alone for 30 minutes with paper towel under every joint.

No paper instructions in the box. The installation illustration is in the product images above.

What buyers said

Left by people who bought this part here. Compatibility reports are the useful ones — if you installed it, say which board.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

Questions people ask about this part

Answers specific to CPU-7529-SR. If yours isn't here, ask — we'd rather talk you out of the wrong part than sell you one.

Will it fit my CPU?
It fits the sockets listed on this page and nothing else. Compatibility is decided by the socket on your motherboard, not the processor's name. Not sure which socket you have? Send us the board model and we will check.
Do I need a backplate?
Desktop sockets (AM4, AM5 and the Intel desktop sockets) mount through a backplate, and it is in the box. Threadripper, EPYC and Xeon sockets have no backplate: the block screws straight into the posts on the socket frame.
Which port is the inlet?
It is marked on the block and shown in the installation illustration in the product images. The wrong way round still works but runs warmer, so it is worth getting right.
Will it clear the parts around my socket?
Check the M.2 heatsink next to the socket first, then the first memory slot and any tall heatsinks around the socket. The block dimensions are on this page. If you are unsure, send us a photo of the board around the socket.
Can I use it with an aluminum radiator?
No. Copper and aluminum in the same loop corrode each other. Keep the loop copper, brass and nickel.
Is shipping free?
Yes — shipping is included at this price for addresses in the lower 48 US states.
Do I need anything else to use it?
A CPU block is one part of a loop: you also need a pump, a radiator, fittings, tubing and coolant. Thermal paste and the mounting hardware are in the box. If you are starting from nothing, send us your parts list and we will tell you what is missing.
Who handles the warranty?
PrimoChill, from Boise, Idaho. Every claim is handled directly by our support team rather than returned to an overseas factory.

Ask us before you order

Send your exact hardware model and we'll confirm the right part before you spend $139.99 — or tell you honestly that this isn't the one.

Returns are accepted within 30 days and are easy to start in the support center. Unopened items can be returned for store credit with no restocking fee; other returns carry a restocking fee, higher for items that have been installed or used.

Ask about compatibility