3 ATI HD 4870 crossfire and Corsair HX850 PSU

I was wondering if Corsair HX850 PSU would be enough for 3 HD4870 (1gb) (or 1 hd 4870 and 1 hd 4870 X2) cards in crossfire. I am running Phenom II X3 720 at 3.4GHz at 1.324V with Corsair DDR301600 4Gb sticks. I have 3 1TB hard drives and MSI 790FX-GD70. Also, is this a good PSU for future upgrades. I don't know much about PSUs so, please help. I will appreciate any feedback or even different PSU.
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More about 4870 crossfire corsair hx850
  1. The PSU is fine for 3x 4870, but I'm pretty sure your CPU will be a bottleneck. Triple CF also does not scale well.
  2. +1 on the need for a higher end CPU. With a single card, an X3 720 will do great and even fine with 2, but with 3 I would look for a better CPU. Three cards also will give you very marginal gains relative to the increase from one to two GPUs. Two is fine, but 3 isn't worth it.
  3. one-shot said:
    +1 on the need for a higher end CPU. With a single card, an X3 720 will do great and even fine with 2, but with 3 I would look for a better CPU. Three cards also will give you very marginal gains relative to the increase from one to two GPUs. Two is fine, but 3 isn't worth it.

    really? ive actually heard the opposite. some people on the forums were sayin how three 4870s(1 4870x2 and 1 4870) were getting more frames than 4 in cf, 2 4870x2's.. idk, maybe just a random anomaly.
  4. Because with 4, there is too much overhead, and ultimately CPU bound. To the OP, the HX850W should be more than enough. Why not go for 2x 4890s? I wouldn't be surprised if it's better overall than 3x 4870s.
  5. navysealbrian said:
    Because with 4, there is too much overhead, and ultimately CPU bound. To the OP, the HX850W should be more than enough. Why not go for 2x 4890s? I wouldn't be surprised if it's better overall than 3x 4870s.

    yahh your right. the reason why i7 is soo amazing for cf and SLU.

    yahh 2 4890s would seriously kick @$$ and be alot cheaper, and scales better too.definately go with a pair of them. and make sure to overclock to one ghz ;)
  6. My i7 is great, but it wants another video card. I have 3 PCI-E slots, so maybe 3 cards isn't a bad idea.....haha.
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