Granzon
Granzon GBN-RTX4090H Full Armor GPU Water Block for NVIDIA RTX 4090 AIC Reference PCB, Nickel-Plated Copper, G1/4
Granzon GBN-RTX4090H Full Armor GPU Water Block for NVIDIA RTX 4090 AIC Reference PCB, Nickel-Plated Copper, G1/4
TL;DR: The Granzon GBN-RTX4090H targets RTX 4090 boards built on the NVIDIA AIC reference PCB used by many partner cards. Its nickel-electroplated high-purity copper base bonds to the AD102 die, GDDR6X memory pads, and VRM phases in a single sweep, with a 0.3mm microchannel gap that keeps coolant velocity...
Common Applications
The Granzon GBN-RTX4090H targets RTX 4090 boards built on the NVIDIA AIC reference PCB used by many partner cards. Its nickel-electroplated high-purity copper base bonds to the AD102 die, GDDR6X memory pads, and VRM phases in a single sweep, with a 0.3mm microchannel gap that keeps coolant velocity high across the die. Overall block size is 223.31 x 124.5 x 30.52 mm, capped by a black-anodized aluminum frontplate and matching backplate that never contact coolant. G1/4 top and bottom ports allow parallel or serial multi-block routing. Granzon backs the block with a 36-month warranty.
Frequently Asked Questions
Q: Which RTX 4090 cards is the GBN-RTX4090H designed for?
A: It physically fits NVIDIA RTX 4090 cards built on the AIC reference PCB. Before buying, compare your card's PCB image to the manufacturer's compatibility photo. Founders Edition cards use a different layout and need the GBN-RTX4090FE block.
Q: What are the block dimensions?
A: 223.31 x 124.5 x 30.52 mm (length x width x height). Triple-slot thickness in the case once installed.
Q: What materials are used and is the loop safe to mix?
A: Nickel-plated high-purity copper cold plate with black-anodized aluminum frontplate and backplate. The aluminum sits outside the coolant path, so this block is safe in copper, brass, and nickel loops.
Q: What is in the box?
A: GPU water block, frontplate armor, backplate armor, two stop fittings, mounting hardware, and thermal grease. Thermal pads for memory and VRM are included or pre-applied.
Q: What warranty does Granzon offer?
A: 36 months from the manufacturer.
