GPU: Radeon HD 7770
OS: Win10 x64
Driver: Adrenalin Edition 18.2.1
So, after a year of not using my desktop computer, because some OS fault damaged the Windows Installation beyond repair, I recently re-installed windows 10. The GPU, after installing the drivers worked fine, but the fan was not spinning. Even during a stress test, in which the GPU reached 90*C, no spinning. This is definitely not the intended cooling behavior.
The drivers where installed using the auto-driver-detect utility. Oddly, my GPU was being detected as an R7 200.
What I tried:
- Using the Override functionality of the Crimson Settings Panel
I tried manually setting the GPU Fan speed. These are my results:
0% - 75%: nothing, no spinning
75% - 100%: fan is spinning at what seems to be the apropriate speed for the setting.
Turning the speed back down, from a running state (75%-100%) keeps the Fan spinning till about 70%, after which the Fan just stops.
- Using a different PSU: No difference
- Removed Fan to test with an Arduino:
Fan works with just fine, responses to pwr input (only tried grounding it)
- Removing the Pwr (blue cable) from the Fan plug
The Fan run at high speed the entire time the system was operational
Conclusion:
- Fan works Ok
- GPU works Ok, except for the Fan
The speed control of the GPU must be faulty. This could either be a hardware bug, or a software one.
Is my conclusion right? Did I miss something? How can I fix this? Please help!
Thank you.
