Barrow BS-AST4090OG-PA Full-Cover GPU Water Block with Backplate for ASUS TUF RTX 4090 O24G OG Gaming (A02 PCB)

Barrow BS-AST4090OG-PA Full-Cover GPU Water Block with Backplate for ASUS TUF RTX 4090 O24G OG Gaming (A02 PCB)

TL;DR: The BS-AST4090OG-PA is a full-coverage GPU water block matched to the ASUS TUF RTX 4090 O24G OG Gaming, A02 PCB revision. It cools the GPU die, all GDDR6X memory chips, and the VRM stages from a single nickel-plated copper cold plate, with G1/4 inlet and outlet ports and an integrated backplate....

Common Applications

The BS-AST4090OG-PA is a full-coverage GPU water block matched to the ASUS TUF RTX 4090 O24G OG Gaming, A02 PCB revision. It cools the GPU die, all GDDR6X memory chips, and the VRM stages from a single nickel-plated copper cold plate, with G1/4 inlet and outlet ports and an integrated backplate. Lighting is 5V 3-pin addressable RGB and must not be connected to a 12V 4-pin RGB header. The set ships with the block, backplate, two stop plugs, thermal pads and a screw kit; thermal paste for the GPU die is not included. Verify the PCB revision printed on the card before purchase, as the OG A02 layout is not interchangeable with the standard TUF or ROG Strix RTX 4090.

Frequently Asked Questions

Q: Which exact card does this block fit?

A: ASUS TUF RTX 4090 O24G OG Gaming, A02 PCB revision only. Standard TUF and ROG Strix RTX 4090 use a different block (BS-AST4090-PA).

Q: What is included in the box?

A: Full-cover block, aluminum backplate, two G1/4 stop plugs, a screw kit and a Barrow thermal pad set.

Q: What RGB header does it use?

A: 5V 3-pin addressable RGB. Connecting to a 12V 4-pin RGB header will damage the LEDs.

Q: Is thermal paste included?

A: Thermal pads for VRAM and VRM are included; thermal paste for the GPU die is sold separately.

Q: What is the port size?

A: G1/4 inlet and outlet, standard for all PC water cooling fittings.