Multi-GPU Performance

Crysis

NVIDIA's own multi-GPU solution outperformed the GeForce GTX 280 when it launched, so it is not too surprising to see the Radeon HD 4870 in CrossFire mode doing the same. If AMD can put two of these things on a single card it will have a viable competitor for the GTX 280 as well as the GX2.


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Call of Duty 4

AMD's architecture did very well under Call of Duty 4 in the single-card tests, with a single Radeon HD 4870 performing better than a GeForce GTX 260. The scaling from one to two cards is beyond perfect in CoD4, the reason being that we test on two different platforms (Intel X48 for CrossFire, NVIDIA 790i for all single-cards), the end result is a rare case where two of AMD's $300 cards actually outperform two of NVIDIA's $650 cards. By no means is it the norm, but it is a testament to the strength of AMD's RV770 GPU.


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Enemy Territory: Quake Wars

CrossFire continues to scale poorly in Quake Wars, while NVIDIA's GeForce GTX 280 SLI completely dominates the charts here. The 4870 CF performance isn't terrible, it's actually in line with where it should be (2 x $300 cards are about as fast as 1 x $650 card).


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Oblivion Multi-GPU Performance in Assassin's Creed, Oblivion, The Witcher & Bioshock
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  • Final Destination II - Wednesday, June 25, 2008 - link

    Dear girls and guys,

    does anyone know of a manufacturer, who offers a HD4850 with a better cooler? I'm desperately searching for one...


    Please reply!
  • Graven Image - Wednesday, June 25, 2008 - link

    Asus recently announced a 4850 with a non-stock cooler, though their version still doesn't expel the air out the back like a dual slot design. (http://www.asus.com/news_show.aspx?id=11871)">http://www.asus.com/news_show.aspx?id=11871). Its not available yet thought. My guess is mid-July we'll probably start seeing a couple different fan and heatsink designs.
  • strikeback03 - Thursday, June 26, 2008 - link

    Only dual-slot card I've ever used was an EVGA 8800GTS 640, it sucked air in the back and blew it into the case.
  • Final Destination II - Wednesday, June 25, 2008 - link

    Nice! 7°C cooler, that's a start! I guess I'll wait a bit more, then.
  • Spacecomber - Wednesday, June 25, 2008 - link

    Although I'm somewhat dubious about dual card solutions, I keep looking at the benchmarks and then at the prices for a couple of 8800 GTs.

    Perhaps, if the 4870 forces Nvidia to reduce their prices for the GTX 260 and the GTX 280, they will likewise bring down the price for the 9800 GX2. This is already the fastest single card solution, and it sells for less than the GTX 280. If this card starts selling for under $400 (maybe around $350), will this become Nvidia's best answer to the 4870?

    Given the performance and the prices for the 4870 and the 9800 GX2 will Nvidia be able to price the GTX 280 competitively, or will it simply be vanity product - ridiculously priced and produced only in very small numbers?

    It should be interesting to see where the prices for video cards end up over the course of the next few weeks.
  • kelmerp - Wednesday, June 25, 2008 - link

    Better HD knickknacks? Better offloading/upscaling?
  • chizow - Wednesday, June 25, 2008 - link

    The HD4000 series have better HDMI sound support with 8ch LPCM over HDMI, but still can't pass uncompressed bistreams. Image quality hasn't changed as there isn't really any room to improve.
  • kelmerp - Wednesday, June 25, 2008 - link

    It would be nice to have a video card, where it doesn't matter how weak the current-gen processor is (say the lowliest celeron available), the card can still output 1080p HDTV without dropping any frames.
  • Chaser - Wednesday, June 25, 2008 - link

    Good to have back at the FRONT of the finish line.
  • JPForums - Wednesday, June 25, 2008 - link

    Ragarding the SLI scaling in Witcher:
    The GTX 280 SLI setup may be running into a bottleneck or driver issues, rather than seeing inherent scaling issues. Consider, the 9800 GTX+ SLI setup scales from 22.9 to 44.5. So the scaling isn't an inherent SLI scaling problem. Though it may point to scaling issues specific to the GTX 280, it is more likely that the problem lies elsewhere. I do, however, agree with your general statement that when CF is working properly, it tends to scale better. In my systems, it seems to require less CPU overhead.

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