Granzon
Granzon GBN-RTX4080H Full Armor GPU Water Block for NVIDIA RTX 4080 AIC Reference / GALAX RTX 4080 / Gainward Phantom GS, G1/4
Granzon GBN-RTX4080H Full Armor GPU Water Block for NVIDIA RTX 4080 AIC Reference / GALAX RTX 4080 / Gainward Phantom GS, G1/4
TL;DR: The Granzon GBN-RTX4080H is matched to the NVIDIA RTX 4080 AIC reference PCB used by partner cards including the GALAXY GeForce RTX 4080, GALAXY GeForce RTX 4080 SG, and Gainward GeForce RTX 4080 Phantom GS. The nickel-electroplated high-purity copper cold plate bonds to the AD103 die, GDDR6X...
Common Applications
The Granzon GBN-RTX4080H is matched to the NVIDIA RTX 4080 AIC reference PCB used by partner cards including the GALAXY GeForce RTX 4080, GALAXY GeForce RTX 4080 SG, and Gainward GeForce RTX 4080 Phantom GS. The nickel-electroplated high-purity copper cold plate bonds to the AD103 die, GDDR6X memory pads, and VRM phases in a single full-cover sweep, framed by a black-anodized aluminum frontplate and backplate that never contact coolant. G1/4 top and bottom ports support both parallel and serial flow for multi-block loops, and thermal grease ships in the box for the die contact patch.
Frequently Asked Questions
Q: Which RTX 4080 cards does this block fit?
A: Cards built on the NVIDIA RTX 4080 AIC reference PCB, including GALAXY GeForce RTX 4080, GALAXY GeForce RTX 4080 SG, and Gainward GeForce RTX 4080 Phantom GS. Founders Edition cards use a different PCB and need the GBN-RTX4080FE block.
Q: What materials are used?
A: Nickel-electroplated high-purity copper cold plate, POM top, and black-anodized aluminum frontplate and backplate. The aluminum stays outside the coolant path.
Q: What is in the box?
A: Full-cover GPU water block, frontplate armor, backplate armor, two stop fittings, mounting hardware, and thermal grease.
Q: What fittings does it use?
A: G1/4 inch threaded ports on top and bottom, configurable for parallel or serial loops.
Q: Are English instructions included?
A: No - printed instructions are typically Chinese only. Refer to the manufacturer's online installation guide and PCB compatibility photos before mounting.
