Converted a dying RTX 4090 SUPRIM Liquid X to air cooling using a donor SUPRIM X cooler
Went from instant 96C core / 112C hotspot the moment a game launched (or basically any GPU load) to 65C core / 76C hotspot after 20 loops of Steel Nomad stress test. Temps are even lower in actual games. In Unreal Engine workloads the card would instantly spike thermally and either black screen or hard restart the system. After the conversion, the exact same project stayed under 50C.
Used Thermal Grizzly Phasesheet on the die. Memory junction temp peaked at 102C, which I know is a little high, but I didn’t want to risk reopening the GPU and potentially compromising the excellent core contact just to shave off a few degrees. The donor cooler still had all thermal pads intact and in good shape, so I decided not to disturb them.
Overall this was an insanely satisfying project from start to finish. From diagnosing the failing AIO and confirming internal clogging, to researching compatibility, verifying the air cooler fit, and finally completing the conversion itself.
Super happy with how it turned out, and most importantly the client got his flagship GPU back instead of replacing it.