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1 4850 or Dual SLI 8800GTX's

I'd like to know if I would see better performance with my:

HD 4850 (512mb) in PCI-E 16x mode
or
Two Nvidia 8800GTX (768mb), but because my Motherboard only supports PCI Express 2.0 at (single x16 or dual x8) will I actually have more sluggish performance with 2 Good Cards but at 8x.

My CPU should not be a bottleneck as at Full Settings its never gotten over 40%. AMD Phenom II X3 2.8Ghz BE (AM3).
I own all 3 of these cards (got the 8800's as a present), and know that I will need to get the 5900series eventually if and when my primary game (LOTRO) goes Dx11. But until then LOTRO, MW2, and Bluray playback is my top concern.

According to a basic 3dMark test on this site, that compared all modern Graphics cards it said that Two SLI 8800GTXs got 22,000 score while a single 4850 recieved 14,000. My main question is then will I actually lose out because my motherboard is only PCI-2.0 x8 when in SLI?
11 answers Last reply Best Answer
More about 4850 dual 8800gtx
  1. What is your board? If the board has an ATI chipset there wont be sli unless the card were to be a 7900 gtx duo, 7950 gx2, 9800gx2, or a gtx295. In the end test each card to see which one gives you the best score in the game that you play.
  2. That there is a Crossfire motherboard, I'm sure.
  3. That is a Crossfirex board, but I have two dongle looking things that I have connected between each card. Had to put in a new PSU (1000w) because it needed 4 PCI-E 6pin connectors
  4. Best answer
    What they are saying is that it is a crossfire motherboard and not SLI. You cannot use two 8800GTXs on it.
  5. Darn, are these things worth anything on Ebay still haha. I spent an hour redoing my PSU and putting the two 8800s in, and Windows and 3Dmark is only showing one being utilized at 8x.
  6. I think they do still fetch a decent price on ebay. If there's any card that's retained a decent value so long from when it was introduced it's that one.
  7. jyjjy said:
    I think they do still fetch a decent price on ebay. If there's any card that's retained a decent value so long from when it was introduced it's that one.


    $75~$200 depending on condition and brand.
  8. Even the the HD4850 beats it?

    Odd.

    Anyways.

    Go buy yourself another 4850 with the money you get from those cards. Or a 4850x2 and have a trifire setup ^_^.
  9. Does the 16x / 8x thing really hamper performance? So if I end up getting a 2nd 4850 (or 5870) Ill still see some performance increase even if it goes to 8x?
  10. Only the second card should run at x8 I believe so if you get an HD5870 it should be entirely unaffected. I'm not sure what the effect would be on HD4850s in xfire though.
  11. There is absolutely no bottleneck so far in a 2.0 x8 slot. I doubt the 5970 will be bottlenecked in it.
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