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    CPU vs GPU OC

    Discussion in 'Sager and Clevo' started by naticus, Aug 18, 2008.

  1. naticus

    naticus Notebook Deity

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    Well I was bored this morning so I decided to overclock my gpu, through the BIOS, to see if i could get a bit more performance with call of duty4 (trying to stay at constant 250 fps with my .cfg). So I oc'd the GPU to 625/1450/925 and my results with real time cod4 was rather disappointing- i actually lost 20-30 fps from my standard setup ( no gpu OC, cpu OC'd to 2.3ghz). So i thought it to be an error so i checked the gpu bios through nibitor and everything was correct, so I then ran crysis benchmark tool, and found that my cpu oc vs gpu oc was very cpu dependent (like cod4) at even native resolutions, crysis being 2-3 fps more on avg.

    Why would my cpu oc benefit gaming more than a significant gpu oc? Is my c2d the bottleneck@ 2.0ghz and when OC'd to 2.3ghz (using setFSB) it removes the bottleneck? I used crysis (@ native res 1440x900, with xconfig very-high settings) and cod4 low settings (for competitive play) to see differences in gpu and cpu dependencies with both the same results - the cpu OC was by far more beneficial for gaming in both scenarios.....hmmm.

    Any ideas?
     
    naticus, Aug 18, 2008
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  2. Rorschach

    Rorschach Notebook Virtuoso NBR Reviewer

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    Setfsb makes your entire system run faster, not just your cpu. Thats why people get such high increases compared to just overclocking the gpu.
     
    Rorschach, Aug 18, 2008
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  3. naticus

    naticus Notebook Deity

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    Yeah i guess i see that now...setFSB should be used then instead of GPU oc. I mean the results I got back from testing cod4 were crazy, 20-35 fps difference in the different OC's.
     
    naticus, Aug 18, 2008
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  4. NCG1589

    NCG1589 Notebook Consultant

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    Nm im dumb lol.
     
    NCG1589, Aug 18, 2008
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  5. Andy

    Andy Notebook Prophet

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    FPS games show an increase in physics realism and frames per second with a faster CPU. When you overclock the CPU through SetFSB, you're actually increasing the frequency of the FSB which in turn increases the frequency of all the components of the Northbridge (CPU, GPU and RAM).
     
    Andy, Aug 18, 2008
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  6. Rorschach

    Rorschach Notebook Virtuoso NBR Reviewer

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    The other thing to keep in mind about setfsb is that your system is overclocked 100% of the time when its active, while with the gpu you can just have it overclocked while gaming. Using just gpu overclocking should help keep temps down while not gaming.
     
    Rorschach, Aug 18, 2008
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  7. naticus

    naticus Notebook Deity

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    very true, but I undervolted my cpu while its OC'd with SetFSB and my cpu at idle are rather low in the ~ mid 30's celsius.

    right now with just xfire and mozilla open:

    [​IMG]
     
    naticus, Aug 18, 2008
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  8. Rorschach

    Rorschach Notebook Virtuoso NBR Reviewer

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    I really just meant more like the gpu and chipset will run hotter. To easy to just undervolt the cpu :D.
     
    Rorschach, Aug 18, 2008
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