Possible GPU throttling to random (low) frame rate caps?

PCGamesBeLike · December 5, 2015

Hi there,

I got a GTX 750 Ti Single-Fan 2GB installed into my PC a few months back, and I figured out how to fix framerate issues, just a some more thermal paste on the CPU and new fans in the case. It was overheating.

I have a new issue that might be related. Whenever I play a game for a long duration, and then switch over to another game, the game or my GPU will cap the game to 30FPS and have drops below 30, even though when I start it from a cold boot it will get 60FPS solid with VSync. After a little while it will go back to 60 and everything is fine. Why is it doing this, is it overheating?? Like I mentioned, it will do fine if I wasn't doing anything intensive prior, and it will go up after a while.

For example, I was playing about 2-3 hours of Left 4 Dead 2 at Very High settings with 4X MSAA at 768p 60HZ, but then I switched over to Sonic Generations at High settings with FXAA at 768p 60HZ, but the framerate would never go above 30 and would have frequent dips into the lower teens until about half an hour later. The game normally holds a solid 60FPS with very minor drops into the mid-50's when loading new areas.

If it helps, here's my specs:

i5-2320 (3.0GHZ Quad-Core)

Generic Acer Motherboard from a prebuilt (all I can say about it is it's from a Gateway DX4860-UB33P)

8GB DDR3-1333MHZ RAM

GTX 750 Ti Single-Fan 2GB (overclocked 228MHZ from base and 305MHZ from memory, most stable overclock I could get it to without artifacting, also has 50% fan speed)

1TB HDD

500W Cooler Master (don't remember model) power supply

PaulKolby · December 5, 2015

try turning off vsync i cant imagine ur cpu is bottlenecking it

PCGamesBeLike · December 5, 2015

try turning off vsync i cant imagine ur cpu is bottlenecking it

Sorry for the late reply, didn't get the chance to test it until morning.

VSync does nothing to alleviate the issue.

Today, I was running the Valley benchmark at Ultra 768p (No AA) just to see how many average FPS my graphics card would get in it (50-60ish). Then, I went to play WWE 2K15, and the framerate refused to go above 15, even though from a cold boot it gets 60FPS solid.