Since yesterday my graphics card is quite hot even when the computer is idle.
- It's a notebook running windows 7, with two graphics cards: an integrated Intel, and a NVIDIA GeForce GT 540M
- It shortens the battery runtime, so it's not just lack of cooling
- CPU load is low
- GPU-Z shows high values for Core-, Memory-, and Shader-Clock but the load is a constant 0% (probably doesn't measure it) (Screenshot)
- Temperature is somewhere between 60 and 75 deg
- I don't recall installing any program shortly before the problem occurred for the first time, nor changing any relevant system setting
- Tried a system restore, didn't help
- Process Explorer shows GPU usage for "dwm.exe" and "csrss.exe", but it's between 1 and 5%. No other programs with GPU usage.
- Somebody mentioned a bitcoin mining virus camouflaging as svchost, but to me all instances of svchost looked harmless
- Neither Malware Bytes nor MS Security Essentials found anything
- Occurs even when most programs are closed (no browser, video player etc.)
- The computer is lagging a bit, but I'm not sure if that's related
- Perhaps it's actually some other hardware part that's mishaving, but for me it looks like it's the GPU.
I'm running out of ideas what could cause this. How can a find the cause of this, and fix it?