Bykski AIO Integrated Liquid CPU Cooler for Intel LGA1700/1800/115X and AMD Ryzen 9/7/5/3 AM5/AM4 featuring A-RGB Lighting - 240mm (B-FRB240)
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Bykski AIO Integrated Liquid CPU Cooler for Intel LGA1700/1800/115X and AMD Ryzen 9/7/5/3 AM5/AM4 featuring A-RGB Lighting - 240mm (B-FRB240)

B-FRB240 Only 1 left in Boise, ID
$167.99USDFree shipping, lower 48

US import duties and tariffs are included in every price.

Ships the same business day on orders placed before 2:00 PM MST. Overnight delivery available at checkout.
Ships directly from our Idaho inventory. You avoid overseas sellers, processing delays, international shipping, customs hold-ups and additional fees.
Fits these 2 boards, and only these

This part is machined for the 2 boards listed below — nothing else. Board revisions and partner designs differ, so match your exact model against the list before you order.

  • AMD Socket: AM5 / AM4 - Ryzen 9/7/5/3
  • Intel Socket: LGA 1700/1800/115x
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.
or ready to checkout now
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.
Exclusive US distributor
The official US source for Bykski, so every part is genuine.
Bykski AIO Integrated Liquid CPU Cooler for Intel LGA1700/1800/115X and AMD Ryzen 9/7/5/3 AM5/AM4 featuring A-RGB Lighting - 240mm (B-FRB240)
Micro-channel cold plateThree socketsCopper cold plate
CPU block · AM4 / AM5 / LGA 1700

Three sockets.
One copper plate.

A copper water block for AM4 / AM5 / LGA 1700. The mounting kit in the box covers every socket listed on this page.

The part that touches the CPU

The cold plate

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

Compatibility is decided by the socket, not the chip name

Check the socket on your board

The block fits the sockets below and nothing else. Look up the socket for your motherboard, not the processor's name. Which socket is my CPU?

AM4Ryzen 1000 to 5000Backplate mount
AM5Ryzen 7000 to 9000Backplate mount
LGA 1700Core 12th to 14th genBackplate mount
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 centre of the plate. Plumbed the wrong way round, the block still works but runs warmer, and nothing about it looks wrong.

About this part

The Bykski RGB AIO series offers efficient cooling with the B-FRB240 CPU cooler, which combines a pump, water block, radiator, and braided EPDM tubing into one unit for effective self-circulating water cooling. It features a copper base plate for excellent thermal conductivity and built-in addressable RGB lighting. The included 2x120mm A-RGB fans cool the radiator and enhance your case's illumination.

In the box
  • 1x CPU/Pump Water Cooling Block w/ A-RGB
  • 1x 240mm Integrated Radiator
  • 1x AMD Mounting Bracket
  • 1x Intel Mounting Bracket
  • 1x Set of Mounting Hardware (4x mount / 8x short fan / 8x long fan)
  • 2x A-RGB LED (RBW) Fan
  • (Warning: Addressable RGB (RBW) is 5V and is ONLY compatible with A-RGB (RBW) components. RGB is 12V and is ONLY compatible with RGB components. Mix and match will NOT work and will cause damage.
If the gallery shows a parts diagram, that diagram is the source of truth for what ships.
Datasheet
ModelB-FRB240
BrandBykski
Radiator Dimensions277mm x 120mm x 27mm
Pump Speed3150-5200 RPM
Connector type4-Pin PWM
Tube MaterialBraided EPDM tubing
Fan3x120mm A-RGB
Fan Speed3000 RPM
Air Flow105.5 CFM (max)
Voltage12V Fan / 5V LED
SKUB-FRB240
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 277mm x 120mm x 27mm. 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 height277mm x 120mm x 27mm
Check firstM.2 heatsink by the socket
Lighting

5V 3-pin ARGB only

The lighting strip plugs into a 5V 3-pin addressable header, labelled ARGB or ADD_HEADER on most boards, or into an ARGB controller.

Do not plug it into a 12V 4-pin RGB headerThe plugs look similar. A 12V header will burn out the strip the moment the machine powers on.
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 fitted it, say which board.

Customer Reviews

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Questions people ask about this part

Answers specific to B-FRB240. 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?
BYKSKI.US, the exclusive US distributor, from Boise, Idaho. Claims are handled domestically 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 $167.99 — 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