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Jumpy games, Framerate problems, please help

Last response: in Graphics & Displays
February 2, 2012 10:03:47 PM

I've recently made a new i7 build with a AsRock Extreme 4 gen 3, nvidia 560 GTX , 1TB WD caviar blue, 8 GB of GSkill ram and a coolermaster extreme power plus 700 watt.
Everything run fine at this point in time, Skyrim and Saints row 3 ran at at least 30 fps.

However, I recently changed the mobo for a gigabyte z68xp ud3r, and the gpu for a HD6870.

Since then, games have been jumpy, but it's usually unrelated to framerate. I get 70 fps in Dirt 2 and Fallout new vegas however it often "jumps" slightly while maintaining 70 fps. :cry: 

On another note, Skyrim and Saints row 3, which ran fine on the 560 GTX, now have horrible framerate issues.
I've googled this and it does appear to be a common issue with ATI gpu's, but my other pc with a 6850 runs everything fine.

I think this would probably be a gpu issue but seeing as everything runs fine on a 6850 and I've just changed the mobo perhaps it could be something else?

Any help would be much appreciated.
February 2, 2012 10:20:05 PM

Tried this.
Is it possible something is wrong with my gpu?
Related resources
a b U Graphics card
February 2, 2012 10:27:27 PM

You did it with that tool? I wouldn't trust doing it manually. This could possibly be a GPU issue, but I wouldn't expect it to work in some games but not others if there were a hardware problem.

How are your temperatures under load?
February 2, 2012 10:56:44 PM

Thanks, I'll try it now.
Under load nothing in the computer gets over 70 degrees, so I assumed heat wouldn't be an issue.
February 2, 2012 11:56:05 PM

Alright, I wiped all the drivers and re-installed them, and the jumpiness seems to be gone. However, whilst playing dirt 2, my gpu got up to 75 degrees. Is this normal?
a b U Graphics card
February 3, 2012 12:01:44 AM

That's safe, though not ideal. I think a 6850 should generally be lower. How's your case ventilation?

CPU temp under Prime95 load?

Good stuff with the drivers.
February 3, 2012 12:10:17 AM

The CPU temp didn't get above 58 degrees.
The case ventilation is great, a 20cm fan at the fron, 14 cm at the top and water cooling.
However, I can't stop the water cooling from running on full, it's a corsair h60. Any ideas?
It's always running at 4300 RPM.