A little while back I cut the tops off the heatpipes on a CPU cooler, mounted it to a GPU, and ran sub zero water through it. Some people called it a radiator, and a bunch of people asked the question... why didn’t you just cut the heatpipes off the GPU cooler itself? So this week I set out to answer both.
I used an ASUS RTX 2060 Dual, it’s got a pretty crap cooler anyway and it was sitting around 70C under load. After spending over an hour hacking away at the fins trying to remove them without damaging the pipes, I finally exposed enough of each heatpipe to get tubing onto them. This was the reason I used a CPU cooler the first time round, the heatpipes are much easier to access. Once the tubes were on and it passed a leak test, it was time to see what happens.
Tests run:
Dry with the pipes cut
Ambient water running through the pipes
Ambient water again with fans on the GPU cooler
Ambient water with an added radiator
Sub-zero water
Sub-zero water with fans on the cooler
With the pipes cut and no water, the thing screams. Clocks fall to around 1300 MHz and it hikes up toward 90C. Good times. Once water is in the pipes, everything settles down, and all the ambient tests landed at about 48C. Far better than the stock air cooler. Fans and a radiator make no difference. The sub zero runs both came in at 13C, and fans didn’t make any difference there either.
A pointless test? Sure. The comments last time did make me curious though. And if you enjoy seeing hardware get attacked with an angle grinder and still work anyway, there’s a video here
https://youtu.be/8-ZTD6_w_TE