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Significantly Lower 3DMark Graphic Score After CPU Overclocking?

post #1 of 2
Thread Starter 
First run with 4770k @ Stock settings

Graphics Score
20302
Physics Score
10493
Combined Score
5974
http://www.3dmark.com/fs/826589

Second run with 4770k @ 4.3ghz. (I only changed multiplier to 43 and set vcore at 1.25v . Ran Prime95 for a couple of hours and It was quite stable and below 70c)

Graphics Score
14579
Physics Score
11639
Combined Score
5182
http://www.3dmark.com/fs/826694

So physics score went up around 10%~ as expected. But graphics score dropped almost 30%.
And it's not just 3DMark Firestrike. Unigine Valley also ran terribly after CPU overclocking (from 100fps+ to around 75fps)

Then I switched back to stock settings and ran it again.

Graphics Score
20418
Physics Score
10165
Combined Score
5642
http://www.3dmark.com/fs/826719

Now graphic score back to normal. Physics Score is slightly lower than my first run but it's probably within margin of error.

I assume CPU overclocking negatively affecting GPU performance isn't normal, so any idea why?
post #2 of 2
Thread Starter 
I did a few more tests today. Apparently the higher the CPU clock speed, the lower the graphic score's gonna to be.

@ 4.2ghz
Graphics Score
15689
Physics Score
11529
Combined Score
5469
http://www.3dmark.com/fs/829678

@ 4.3ghz
Graphics Score
14650
Physics Score
11728
Combined Score
5224
http://www.3dmark.com/fs/829630

@ 4.5ghz
Graphics Score
13509
Physics Score
12161
Combined Score
4973
http://www.3dmark.com/fs/829741


Any inputs?
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