Is 16x 4x on this board a bad idea?

from a few charts I've seen only a 5% drop in the 5000 series using a 16x 4x,, i'm using this board and 2 4870's

i was not planning on crossfiring but i got the extra card for free and my power supply can take the load.. so what should i do?

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More about board idea
  1. Well if you've got the card do some benchmarks of your own and see if it is worth it for you. If it doesn't seem worth it you can always put it on ebay or get a board with a x8 slot.
  2. thats a great idea! what % increase in score would be a good range?
  3. Well, the performance increase from a single HD4870 to an HD4870x2 tends to be somewhere in the 70-80% area on average.
  4. Let us know how it goes. It be interested to see how much a PCIE 2.0 x4 slot limits an HD4870.
  5. i did the benchmark test Heaven

    here is my score for 1 card

    fps 35.6
    score 897

    on crossfire i got

    fps 70
    score 1764

    heaven's settings i used the default

    direct 3d11
    shade high
    tex high
    filter tri

    seems like a 95% boost, not bad
  6. rest of my system... win 7 64bit
    4 gigs ram
    amd 955 at 4.0ghz

    again the 2cards are 4870's
  7. I'd try it in a real game or two. Perhaps something with a built in benchmark like Crysis, Far Cry 2, GTA4, Just Cause 2, ect.
  8. okay just did the just cause 2 benchmark on 1920x1080 on max settings

    1 card time 128seconds, 20.43 fps

    2 cards time 121seconds 48.08 fps
  9. just hoping this info will help someone out
  10. That's some impressive scaling. I guess the x4 slot isn't all that bad on PCIE 2.0 boards.
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