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7970 going Crossfire, good enough system?

Hi

I am planning on getting another Sapphire 7970 OC for a Crossfire setup.

What I have (That I think is relevant):
i7 920 D0 (At stock speeds still)
Asus P6t SE
A decent 750W Corsair PSU
1920x1080 x3 Eyefinity

My 7970 takes up more than 2 slots on my motherboard, which means I have to use a x16 x4 slot on it.
This (From TechPowerup) shows that PCIe 2 x4 should be enough: (I mainly play BF3)

My other concern is the PSU. From what I have read, I think it should be enough.

At the moment, when I play BF3 on Low @ Eyefinity resolution, my CPU usage hardly ever goes above 45%, which is why I haven't overclocked it, also why I think it would not be a bottleneck.

Can someone please clarify these? I would hate to find issues with a $469 card

Thank you
4 answers Last reply Best Answer
More about 7970 crossfire good system
  1. Best answer
    Much better to upgrade to an 850W+ unit in order to both have overclocking flexibility and headroom on the 7970s
  2. I get that it might be on the limit, but I am trying to get away with this PSU. Tight budget. Would it be able to run stably? Even without overclocking? That is what I would like to know
  3. Charybdis said:
    I get that it might be on the limit, but I am trying to get away with this PSU. Tight budget. Would it be able to run stably? Even without overclocking? That is what I would like to know
    Without overclocking should be o.k.
  4. Best answer selected by Charybdis.
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