SLI vs single

Just a quick question:
How would two 6800GT SLI fare against a single card, say 7800? (I must admit that I haven't been paying much attention to SLI so I've got no real idea how it works)
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More about single
  1. You're usually better of with 1 card than two, less heat, less power drawed and generally less expensive.

    Even 2X 6800U cant match the power of the 7800GTX most of the time. The only time I can reccomand going SLI is if you pair up two of the very best video card available at the moment. Super expensive but there's no other way to reach these speed!

    Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0
  2. Yes I know.Although I don't need two cards right now, 1 6800GT should be enough, and it might be cheaper to buy another 6800GT for SLI than buying a new hig end card next time I need to upgrade.
  3. Tech Report comparing cards: <A HREF="http://techreport.com/reviews/2005q3/7800gtx-comparo/index.x?pg=6" target="_new">here</A>

    As you can see, dual 6800Ultras clearly beats out every 7800GTX out there (well, except at 2048x1536 with full AA and AF, but who the hell runs at that anyways :P). However, I totally agree that the power consumption and heat are definitly issues to consider as well.

    Don't know how well the 6800GT does in SLI compared to the 7800, but you can figure it out for yourself by extrapolation using the <A HREF="http://graphics.tomshardware.com/graphic/20050622/nvidia_7800_gtx-12.html" target="_new">7800 review</A> and the <A HREF="http://graphics.tomshardware.com/graphic/20050524/index.html" target="_new">PCI-E VGA charts</A> to get a pretty good estimate.
  4. 1 7800 GTX for about $500 > (or equal) of 2 6800 Ultra for about $800-$900, in most situations.
  5. Its funny because ananadtech's benchmark:<A HREF="http://www.anandtech.com/video/showdoc.aspx?i=2451&p=8" target="_new">here</A>
    Show a somewhat different picture. In game like splinter cell:theory of chaos, it totaly whipes every other cards.

    YOu alaso have to take into accoutn that some games that havent been tweaked(either by the publisher or in nVidia's driver) wont see much if any benefit with SLI.

    Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0
  6. Shoot, if you have a high end system, maybe one of these 7800GT's appearing today would be a great option. As low as $420 so far, but give it a week or two and someones bound to offer one for under $400.


    <A HREF="http://service.futuremark.com/compare?3dm05=658042" target="_new">3DMark05</A> <A HREF="http://service.futuremark.com/compare?2k3=3781954" target="_new">3DMark03</A>
  7. Forget one of them, go with 2 of them SLI'ed. I'm sure that they are going to give out some great benches, and at $300 less than a GTX SLI, much more affordable.
  8. I know GGA dont like it when we base our opinion on only one set of benchmark/conclusion from one site(especially anand!) and I agree but here's a quote from anandtech.com article on the 7800 GT
    Quote:
    That being said, we have to come back to the SLI situation and stress that using SLI as an upgrade path isn't the best idea. SLI is best exploited as an ultra high end technology. For that reason, we won't recommend going out and buying a 7800 GT SLI system as spending less money on a single GTX (or a little more on two) are both more valuable options.

    And I do agree with them(as you can see in my first post =))

    You also have to wonder if spending the extra money for the PSU and the SLI board is really a good option, maybe it is, but as we can see with the GTX, the new generation come really close to 2 X the previous generation. So IMO its not the best way to spend your money, but feel free to do it!

    Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0
  9. Honesly, SLI doesn't interest me. One of these for under $400 or a 7800GTx for $450 would be just fine for me.

    <A HREF="http://service.futuremark.com/compare?3dm05=658042" target="_new">3DMark05</A> <A HREF="http://service.futuremark.com/compare?2k3=3781954" target="_new">3DMark03</A>
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