FSB Scaling: 1066MHz, 1333MHz

It's not all about on-die cache with UT3; we wanted to see if the L2 cache dependency also extended to needing a fast memory subsystem as well. Intel's Core 2 CPUs still rely on an aging front side bus to make the journey out to main memory, so we toyed with increasing the FSB from 1066MHz up to 1333MHz to see how large of an impact existed on UT3.

Our original investigations into FSB performance showed that the move to 1333MHz wasn't a big deal, yielding low single-digit performance improvements in our usual tests.

FSB Scaling - DM-ShangriLa

FSB Scaling - DM-HeatRay

FSB Scaling - vCTF-Suspense  

Unreal Tournament 3 appears to be no different, even with four cores consuming data at 2.66GHz we're looking at a 3% increase in performance on average. The 1333MHz FSB isn't really necessary, while it would make more of a difference at smaller cache sizes, Intel just doesn't offer CPUs with small caches and 1333MHz FSBs.

Large caches? Absolutely. Faster FSB? Not necessary.

UT3 Teaches us about CPU Architecture Multi-Core Gaming is Upon Us
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  • p30n - Wednesday, October 17, 2007 - link

    very good point.
  • retrospooty - Wednesday, October 17, 2007 - link

    "What does this show us? At least for UT3 quad (vs dual) is rather a waste."

    ya, thats pretty much what they said in the article. They tested it so the results can be known.
  • thompsjt1 - Wednesday, October 17, 2007 - link

    "THERE ARE NO HIGH RESOLUTION TEXTURES" in the UT3 BETA demo. They didn't include them for download size reasons and I am sure they WILL include them in the real official demo and I think once you are running these high resolution textures and settings are maximized, we will see bigger difference of Nvidia vs AMD numbers.
  • pnyffeler - Wednesday, October 17, 2007 - link

    The article spent a lot of time on the effect of the size of the cache on an Intel processor, but what about AMD? Does the size of the cache matter, or is this yet another example of Intel's Northbridge system being trumped by AMD's advantage of having the memory controller on the CPU?

    I have no misconceptions that AMD has a chance of topping an Intel here. I'm just curious to see how much better Nehalem will be.

    P.S. Thumbs down on the CPU comparison. You said in the setup you were going to test an X2 4200, but it never made the charts. And what about an 8600 GT? I'm going to be running this game at 640x480, aren't I....
  • NullSubroutine - Wednesday, October 17, 2007 - link

    I believe they did not really test AMD's cpus right now due to the awaiting arrival of Phenom which is less than a month away.

    Looks as though the 200-250 range (RV670 bins) are going to kick some bahooty given their higher core speeds, especially at the 1280x1024, 1600x1200, and 1680x1050 resolutions.
  • Chaser - Wednesday, October 17, 2007 - link

    quote:

    but the real surprise is how competitive AMD is with the Radeon HD 2900 XT.


    I knew with mature drivers this card would rock. It only too a short amount of time. Good job ATI and Anandtech for demonstrating this.
  • aka1nas - Wednesday, October 17, 2007 - link

    That's mainly because there is no AA applied because the UT3 engine doesn't support it in Dx9 mode. AA has been the R600s stumbling block.
  • NullSubroutine - Wednesday, October 17, 2007 - link

    Multi-Sampling seems to run fine, it is Super Sampling that seems to be broken.
  • shabby - Wednesday, October 17, 2007 - link

    The beta demo looks nothing like epic wanted us to think, these pics are back from july.
    http://ve3d.ign.com/images/fullsize/143/PC/Unreal-...">http://ve3d.ign.com/images/fullsize/143/PC/Unreal-...
  • swaaye - Wednesday, October 17, 2007 - link

    It looks nothing like that because that is a ultra supersampled bullshot. Just like every single other game gets these days. In reality, UT3 looks as good as Gears of War right now, and will look a lot better once we get the high quality assets with the full game.

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