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from what i read yes, a quality 750 psu will run both of them fine with enough power to overclock each one. your case will get hot so please have good airflow :3
 

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Easily, you can run those in xfire on a good quality 650w PSU, that includes a heafty overclock.

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Quote:
Originally Posted by Ken1649;15247083
The PSU has +12v 62A = 744w.

Each 6950 TDP 11.66A = 140w x 2 = 280w

You have headroom to go Tri-Fire 6950 2GB & + CPU + Motherboard + peripherals.
Tri-fire will be pushing it. You can do Xfire on a 650w. I'd like to see an 850w PSU for Tri-Fire.

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Quote:
Originally Posted by Ken1649;15247083
The PSU has +12v 62A = 744w.

Each 6950 TDP 11.66A = 140w x 2 = 280w

You have headroom to go Tri-Fire 6950 2GB & + CPU + Motherboard + peripherals.
Quote:
Originally Posted by compuman145;15247097
Tri-fire will be pushing it. You can do Xfire on a 650w. I'd like to see an 850w PSU for Tri-Fire.

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The 750w PSU has +12v 62A = 744w

6950 TDP 11.66A = 140w x 3 = 420w
 

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Discussion Starter · #8 ·
Yeah I'm may go crossfire depending on how bad my system is in the final version of BF3. In the beta with everything set to high my system which is pretty good was only getting like 30-40 frames at 1920x1200. I like at least 50 for smooth game play.
 

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crossfire 750. trifire 850. take it from someone with this exact setup. my corsair has seasonic internals. besides you don't want your psu running at max load constantly. that's generally not where your efficiency is. to trifire with less than 850 would be an "uh oh" waiting to happen.

and believe me I understand that the vast majority of builders over estimate their needed wattage. But back to the OP, that seasonic x750 is a fantastic choice and you will be super happy with it.
biggrin.gif
 

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Discussion Starter · #12 ·
I'll wait for the final version of BF3 then decide if I need to go cross fire to get what I expect in the game. The other thing is I have a arctic cooling twin turbo 2 on my 6950, which is dead quiet and cools perfect. So if I get another 6950 I would want to put another one on. I'm not sure if that would fit. The cooler takes up like 2 1/2 slots.
 

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Quote:
Originally Posted by falcon26;15247379
I'll wait for the final version of BF3 then decide if I need to go cross fire to get what I expect in the game. The other thing is I have a arctic cooling twin turbo 2 on my 6950, which is dead quiet and cools perfect. So if I get another 6950 I would want to put another one on. I'm not sure if that would fit. The cooler takes up like 2 1/2 slots.
To give good airflow to the first 2.5 slot primary card, the secondary have to be at the lowest PCIe x4 which is doable but not recommended. You will need at least PCIex8 (the middle slot). Or put the 2 slot 6950 at the top and 6950 with Arctic Cooling in the second PCIe slot.
130-SB-E675-KR_LG_5.jpg
 

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Discussion Starter · #14 ·
Oh wow. Their is no way another twin turbo 2 would fit. Well their goes the crossfire idea...
 

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I have had 3 unlocked 6950s running on an antec tpn650, and it was pulling a fair bit more than 650W from the wall...not a good idea
biggrin.gif


2 is absolutely fine, though.
 

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Quote:
Originally Posted by falcon26;15248448
I can't go water cooling too $$$ I'll probably just end up running BF3 on MED settings....
I'm sure the beta didn't push these cards enough but I was getting consistent 45 fps on high/ultra with a single 6950 @ 800/1250
 
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