Disappearing GPU Hot Spot Temperature reading

[evermorex76]

Don't know if this is a physical sensor issue or a software/OS/driver bug but seems unlikely to be hardware. Using HWiNFO64 v7.46-5110 with an old EVGA GTX 750 Ti and Windows 10 and I discovered a weird thing. When I started running HWINFO I could see the GPU Hot Spot Temperature reading. If I Restart Windows, I can see the reading afterward. If I Shutdown Windows, or use Sleep or Hibernate, then start it back up, the reading is missing. Anytime I use Shutdown, Sleep or Hibernate, it loses the reading until I use Restart instead. I even turned off Fast Startup in case it was Windows not loading something properly since Shutdown doesn't fully exit Windows with that enabled. It happens even if I completely disconnect power while it's shut down, which is why I think it has to be an issue with software, not hardware.

 

[Martin]

This is a GPU driver issue, it doesn't return the respective thermal status information.

 

[evermorex76]

Why would it happen when put into those states? Especially sleep or hibernate which are supposed to basically freeze the RAM state?

 

[serveral]

Just wanted to add that disabling and enabling your GPU's driver through the device manager lets the hotspot value be reported again, avoiding having to restart your system.