Compute Performance

For our look at compute performance this is going to be a brief look. Our OpenGL AES and DirectCompute Fluid Simulation benchmarks simply don’t scale with multiple GPUs, so we’ll skip though (though the data is still available in Bench).

Our first compute benchmark comes from Civilization V, which uses DirectCompute to decompress textures on the fly. Civ V includes a sub-benchmark that exclusively tests the speed of their texture decompression algorithm by repeatedly decompressing the textures required for one of the game’s leader scenes. Note that this is a DX11 DirectCompute benchmark.

Given the nature of the benchmark, it’s not surprising that we see a performance regression here with some setups. The nature of this benchmark is that it doesn’t split across multiple GPUs well, though that doesn’t stop AMD and NVIDIA from tying. This doesn’t impact real game performance as we’ve seen, but it’s a good reminder of the potential pitfalls of multi-GPU configurations. Though AMD does deserve some credit here for gaining on their single GPU performance, pushing their lead even higher.

Our other compute benchmark is SmallLuxGPU, the GPU ray tracing branch of the open source LuxRender renderer. We’re now using a development build from the version 2.0 branch, and we’ve moved on to a more complex scene that hopefully will provide a greater challenge to our GPUs.

Unlike the Civ V compute benchmark, SLG scales very well with multiple GPUs, nearly doubling in performance. Unfortunately for NVIDIA GK104 shows its colors here as a compute-weak GPU, and even with two of them we’re nowhere close to one 7970, let alone the monster that is two. If you’re looking at doing serious GPGPU compute work, you should be looking at Fermi, Tahiti, or the future Big Kepler.

Civilization V Power, Temperature, & Noise
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  • theSeb - Thursday, May 3, 2012 - link

    I must say I found it quite odd and hilarious to see people accusing Anandtech of favouring AMD by using a monitor with a 1200 vertical resolution. 16:10 monitors are not that uncommon and we really should be showing the industry what we think by not purchasing 16:9 monitors.

    Anyway, if anything this review seems to be Nvidia biased, in my opinion. The 7970 CF does not do too badly, In fact it beats the 690 / 680 CF in many games and only loses out in the games where it's "broken". I am not sure why you cannot recommend it based on the numbers in your benchmarks since it hardly embarrasses itself.
  • silverblue - Thursday, May 3, 2012 - link

    It's not "people", it's "person"... and he's only here to troll graphics card articles.

    When AMD gets it right, CrossFire is absolutely blistering. Unfortunately, the sad state of affairs is that AMD isn't getting it right with a good proportion of the games in this review.

    NVIDIA may not get quite as high scaling as AMD when AMD does get it right, but they're just far more consistent at providing good performance. This is the main gripe about AMD; with a few more resources devoted to the project, surely they can overcome this?
  • CeriseCogburn - Friday, May 4, 2012 - link

    Yes, of course, call names forever, but never dispute the facts.
    I will agree with you though, amd drivers suck especially in CF, and they suck for a lot of games for a long long time.
  • silverblue - Friday, May 4, 2012 - link

    No, I said AMD's drivers have issues with Crossfire, not that they suck in general.

    I've also checked three random British websites and there's no issues whatsoever in finding a 1920x1200 monitor. I also looked at NewEgg and found eight immediately. It's really not difficult to find one.
  • CeriseCogburn - Saturday, May 5, 2012 - link

    1920x1200 all of you protesteth far too much.
    The cat is out of the bag and you won't be putting it back in.
    Enjoy the bias, you obviously do, and leave me alone, stop the stalking.
  • seapeople - Saturday, May 5, 2012 - link

    I'm with ya bro. Forget these high resolution monitor nancy's who don't know what they're missing. I'm rockin' games just fine with 60+ fps on my 720p plasma tv, and that's at 600hz! Just you try to get 24xAAAA in 3D (that's 1200hz total) on that 1920x1200 monitor of yours!

    Framerate fanboys unite!
  • CeriseCogburn - Sunday, May 6, 2012 - link

    Ahh, upped the ante to plasma monitors ? ROFL - desperation of you people knows no bounds.
  • saf227 - Thursday, May 3, 2012 - link

    On page 2 of the review - where you have all the pictures of the card - we have no real basis for figuring out the cards true size. Could you include a reference in one of those photos? Say, a ruler or a pencil or something, so we have an idea what the size of the card truly is?
  • Ryan Smith - Thursday, May 3, 2012 - link

    The card is 10" long, the same length as the GTX 590 (that should be listed on page 2). But I'll take that under consideration for future articles.
  • ueharaf - Thursday, May 3, 2012 - link

    why they back to 256 bits and the gtx 590 have 384 bits?!?!
    cause they dont want to have a lot of advantage?
    maybe the next gtx 790 will have again 384 bits and it would be better than gtx690 ....come on!!!

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