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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  • Ryan Smith - Monday, March 05, 2012 - link

    Whoops, flipped a number. Thanks! Reply
  • Dark_Archonis - Monday, March 05, 2012 - link

    Good to see AMD providing tough competition for Nvidia.

    Now, when do we see Kepler? Nvidia has been taking their sweet ass time with Kepler, it's frustrating. Fermi overall is a frustrating architecture, in that it's only fast in mid-high and high-end specifications. In mid-range and low-end cards Fermi sucks, when compared to equivalent AMD cards.

    Well AT, how long do we have to wait for Kepler? I hope Kepler brings a big performance boost across the board for Nvidia. Intel will only keep improving their integrated graphics, so Nvidia's low and mid-range graphics offerings need to be MUCH better than they currently are, to be worth buying in the future. This is especially true in the laptop market.
    Reply
  • Radnor - Monday, March 05, 2012 - link

    Really for the exception of 7750 witch has a really low power draw, my i will stick with my 4850 CF for now. No reason for upgrade. I mean no new demanding games and 7xxxx ati cards are just expensive. Reply
  • Death666Angel - Monday, March 05, 2012 - link

    "Once again the 7970 and 7950 place quite close to each other, particularly at 1920. "
    I think you mean 7870 and 7950? :-)
    Reply
  • tech6 - Monday, March 05, 2012 - link

    For those waiting for nVidea to come to the rescue with an amazing next generation product, I would urge you not to get your hopes up. Nvidea sees their future in the mobile space creating Tegra APUs and mobile graphics and this is where they are spending their R&D budget. The desktop graphics market is simply not growing much anymore. Reply
  • DeViLzzz - Monday, March 05, 2012 - link

    some people care about Physx so we have to wait on Nvidia lol Reply
  • A5 - Monday, March 05, 2012 - link

    Why? There's like 2 games that use it. Reply
  • CeriseCogburn - Thursday, March 08, 2012 - link

    There's actually like 2 hundred, but keep drinking the radeonaide. Reply
  • SpaceRanger - Monday, March 05, 2012 - link

    Consequently we’re seeing AMD roll out a well-orchestrated launch plan unhindered, with AMD launching each new Southern Islands card at exactly the place they’ve intended to from the beginning.


    The lacking of WHQL Drivers has me shaking my head. Come on AMD. It's been 3 months and you STILL can't get a WHQL driver out for the 7xxx series!
    Reply
  • DeViLzzz - Monday, March 05, 2012 - link

    if you already have a 560 Ti I guess you hope for another price drop on the cards so you can SLI them

    if you can get your hands on an affordable used 6970 or a new Power Color 2 GB 6950 and flash it to a 6970 then do so
    Reply

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