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Games not using all cores

Last response: in CPUs
February 10, 2013 9:09:14 PM

A long time ago I used to play Planetside 2. Sometimes the game would run fine and at others the framerate would take a hit down to around 10. I assumed this was the game so I just uninstalled it.

Today, I was playing Far Cry 3 and the same thing happened. I play it fine, around 60 fps or so, and it crashes for some odd reason. When I restart it, the FPS is super low. Looking at task manager, all cores are at 30% or so when it's fine, but one core is at 95% while the others are at 15% when the frame rate goes down.

i5-3570k OCed to 4.2Ghz
HD 7970 OCed to 1100 Mhz
800w Corsair PSU
128GB Samsung 840 SSD

More about : games cores

a b à CPUs
February 10, 2013 9:43:38 PM

that clockrate is kind of high, try setting it lower
February 10, 2013 9:54:15 PM

chromic said:
that clockrate is kind of high, try setting it lower

4.2 isn't that high for a 3570k though. Plus the problem only occurs sometimes, so shouldn't that not be the problem?
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a b à CPUs
February 10, 2013 10:07:50 PM

i ment GPU clockrate
February 10, 2013 10:22:39 PM

chromic said:
i ment GPU clockrate

Oh yeah, that's what I thought too so I put it at stock but the same problem occurred.

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February 10, 2013 10:39:54 PM

Yeah turning down the clockrate on my factory overclocked 670 solved my farcry 3 issues.
February 11, 2013 3:45:06 AM

chromic said:
i ment GPU clockrate

My GPU clockrate is actually 1100Mhz (It's a Sapphire Vapor-X GHz edition).
The memory on the 7970 is 1600Mhz. Got them mixed up.
February 17, 2013 11:48:07 PM

Best answer selected by vorter.