Overclocking: Gaming & Compute Performance

As always we’ll keep the commentary thin here, but overall the overclocked performance of the 7800s looks very good, which is what you’d expect with a 15%+ core overclock and a 12% memory overclock. With the exception of Skyrim performance at 19x12, the overclocking performance increase for both cards is roughly split between the core and memory overclocks, meaning we’re seeing a 13.5% average performance increase for the 7870 and a 17% average performance increase for the 7850. As the 7800 series has the same number of ROPS as the 7900 series, it looks like we’re running headlong into the memory bandwidth bottleneck that makes the 384-bit memory bus on the 7900 series sing.

All things considered among our tests we have everything from even the 7850OC beating the GTX 580, to the GTX 580 still holding onto its lead versus the 7870OC. But even if you can’t beat a GTX 580 with a 7870OC you can get very close on a card that costs a good bit less.

Meanwhile for compute performance the gains are similar: 12.5% on the 7870, and 19.5% on the 7850.

Overclocking: Power, Temp, & Noise Final Words
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  • Taft12 - Monday, March 05, 2012 - link

    Or don't. It's not on sale for 2 weeks yet. Reply
  • MySchizoBuddy - Monday, March 05, 2012 - link

    NOT with 1/16 the FP64 performance. Reply
  • Zoomer - Wednesday, March 07, 2012 - link

    FP64 is useless for games for the foreseeable future. Reply
  • CeriseCogburn - Thursday, March 08, 2012 - link

    I love the "further image quality improvements page" which delicately and carefully explains how amd did a wonderful job of making things better as the image quality degrades...
    After noting the degredation very, very lightly and tossing out the problem, it is declared "unnoticable" for "all intents and purposes".
    Eventually amd's IQ is going to be so far behind nvidia's the endless denials and it doesn't matters - will just continue since amd can crank an extra 20 fps doing it...
    LOL
    A "gift" from amd.
    Reply
  • MySchizoBuddy - Monday, March 05, 2012 - link

    where is the double precision compute benchmarks Reply
  • CeriseCogburn - Friday, March 09, 2012 - link

    Article: " As AMD began winding down Cayman (6900 series) almost immediately with the launch of the 7900 series, at this point the 6900 market has effectively dried up. Having taken themselves out of competition with themselves, AMD’s only competition is NVIDIA’s lineup."
    --
    And there we have it - AMD and their evil plot to squeeze every last dollar out of those "they care about", the gamers...
    I don't want to hear Nvidia is evil anymore.
    Time to look in the mirror amd users.
    --
    Furthermore, it's time the reviewers start slamming AMD the way they slam Nvidia, in this case, one can consider it PRAISE for AMD "drying up their own card channels"- and if that isn't bias I don't know what is.
    Reply
  • dagamer34 - Monday, March 05, 2012 - link

    These cards don't seem like such a wonderful value considering what the 6900 series was offering, but since those cards have gone poof, I guess you'll have to settle for the 7800 series? It really just seems like they are adjusting their pricing scheme to be less compressed than it was before.

    TL: DR; If you've got a 6900 series card, the 7000 series is not for you.
    Reply
  • Jedi2155 - Monday, March 05, 2012 - link

    I still have my wonderful 5870 I purchased in 2009 (which now is not far from 3 years ago...), and still waiting for something that offers more performance than the 7970. Com'on Nvidia! Blow everything out of the water please.... Reply
  • Death666Angel - Monday, March 05, 2012 - link

    "TL: DR; If you've got a 6900 series card, the 7000 series is not for you."
    I'd say the 30 to 50% increase of the 79xx to 69xx cards could be well worth it. However, unless you run a multi-monitor setup or have a 2560 resolution, you really should think twice about spending that amount of money on these cards. But I guess people with that kind of cash can either do their own thinking or don't have to care too much about spending and can afford to "BUY ALL THE CARDS".
    I'm still running a HD5770 and have a newly acquired 27" monitor here that is really stressing it. I think I'll go for a 78xx and later upgrade to CF because my 550W PSU can handle it with these cards, whereas HD69xx would be stressing it too much. :-)
    Reply
  • cactusdog - Monday, March 05, 2012 - link

    "TL: DR; If you've got a 6900 series card, the 7000 series is not for you."

    Thats the dumbest statement I have ever read here. The 7970 is DOUBLE the performance of the 6970 with overclocking. Even the $250 7850 beats the 6970 with overclocking.

    The 7 series is the biggest performance jump over the previous series since I have followed graphics cards, since 1998.
    Reply

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