Alienware 18 780M SLI GPU overheating

Hey everyone,

I've recently noticed that my GPUs temp goes beyond 90 C (92 or 94 even). This leads to fps drops. I was using MSI afterburner to monitor temps and frequencies. So at first everything goes normal but then temps starting to go up after a minute or so. When it goes beyond 90C frequencies drop and fps drop as well until the heat wears off and then it goes the same again.

I've noticed this while playing Witcher 3. When I go to ingame menus like inventory, character etc, GPUs are starting to cool off. And after I quit the menus fps is ok for a while but then it drops due to temp being above 90.

Whats the reason? I manually tried to check how the fans work and it seems the fan works for only one GPU as I didn't feel the air flow from the second. Also HdWifno sensor does not show fan speed for second GPU (see attached file). Nevertheless The first GPU overheats as well. If I turn SLI off and work with it only the temp eventually goes beyond 90.

What's your advice guys?

 

Blow air into fan vents to clean any dust build up. Secondly, manually open pc and see if fan is running. Check to if any fan connection might have come loose. If fan dead get new one.

 

Yeah, clean the fans and repaste the GPUs... These temps are not too good for GPU...

 

Thanks for advice! I took the laptop to tech support. They cleaned it, refreshed thermopaste. Now the tempretature does not go beyond 70. I never thought dust could be such a deterrence to performance.

 

I don't think my problem is overheating, but when I play titan fall on max settings (except for having ambient inclusion disabled otherwise my fps are around 40 ) I get 60 fps only using one GPU!!
When I turn on SLI mode, my fps drop to around 55 to 40 with my temperatures being under 65C, and with ambient inclusion on it says I get 60 to 100 to 120 and my screen feels like it flickers, and my temperature are in the 90C!!! I really do not know what's wrong!!!