Question / Help How comes OBS lowers my framerate if...

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Deleted member 30350

I have recently started experimenting with streaming Battlefield 4.
I don't understand why does my framerate drop so much when my CPU usage is not even 70%, and according to Process Explorer, OBS uses only about 3% of GPU in addition to whatever CPU usage it has.

When OBS is not active, (in this particular place on specific map) CPU usage is in the 45-50% range, and I get roughly 58 FPS.
On veryfast preset, I take about 8 FPS hit, and CPU usage goes up into 55-60% range.
On medium preset FPS drops down to about 45 average, so more than 10 - but CPU usage is still only up to 70-75%! And there are no spikes at all, it doesn't go above this range.

Considering I am not hitting any performance limits of my PC, I don't think the other OBS settings are important, but I will post them if asked.

Could anyone shed some light onto this?
 
make sure to always use game capture for games if possible also aero can cause problems in some cases under win7

so not using window capture and trying to disable aero might be one test.

another one would be lowering the webcam resolution
 
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