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New PSU (6970 Crossfire)

post #1 of 12
Thread Starter 
So I recently got a 6970 and a 750W Antec True Power PSU, probably only 3 months ago. Three days ago I purchased another 6970 and a Corsair H60 because I decided to overclock my i7 860 because I got an EVGA P55 Micro SLI board. So now it seems I need a new PSU.

I used PSUCalc and entered all the details (CPU OC, GPU OC and Overvolted for both 6970) and it came up with 830 Watts.

I'm from Australia so Amazon and Newegg are no use to me. One because Amazon's international postage is expensive and two because Newegg doesn't ship international.

I'd much prefer getting a 1000W or above PSU. 850W doesn't give me much leeway in case I decide to add more hard drives in the future OR upgrade parts and so on.

So my question is to you overclock, what PSU should I get?

Just leave your suggestions and that would be a great help!
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post #2 of 12
Did you Phaedrus' PSU calculator?

That value seems too high.

Put it this way, I run two unlocked and heavily overclocked 6950s off a truepower new 650W, so a 750W TPN is fine.
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post #3 of 12
You don't need a new PSU, the TPN 750 is an excellent unit, and is plenty for your setup, a solid 750W unit like the one you have can run without an issue a GTX 580 SLI setup, never mind a 6970 CFX setup
post #4 of 12
im running dual 6950s and all sorts of hdds, fans and so on off a 850w unit... no sense in going overboard, unless you are planning on some 3 gpus down the road or what not
post #5 of 12
I run Tri-fire 6950s with no problems on 850w don't see why you'd need anything bigger.
post #6 of 12
Quote:
Originally Posted by OwnedINC View Post
I run Tri-fire 6950s with no problems on 850w don't see why you'd need anything bigger.
I agree... anything higher is overkill. 850W can take trifire with a 50% OC on all cards and a decent amount of HDs
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post #7 of 12
I would just stay with the PSU you have now.
I used to run 6950's unlocked and overclocked in CF on this 750W unit i got without any problems.

If your going to use alot more drive's and are going for really high overclocks i might see the use of a 850W unit but i bet your 750W will be fine to.
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post #8 of 12
I think you be fine. I got a XFX 850W and im running Q6600 1 GTX260 5 HDD 7 Case fans and i bairley break 200W. Buy one of the kill a watt meters that should help show you your usage. (sometimes i ran 2 but GTX260 one is kinda messed up 250-300W total with 2 GPU).
post #9 of 12
Just for another green light for you. Hook em up, you're good to go, 750w is plenty
    
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post #10 of 12
Thread Starter 
Yeah, I've got them all hooked up plugged in and ready. Overclocked CPU to 3.80GHz and Overclocked 6970's and over volted to 1.25V. Seems to be running fine and quite cool. I guess I'll be sticking with this PSU for now
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Intel Core i7 3930k ASUS Rampage IV Extreme x79 / BF3 Edition Inno3D GTX 680 2GB Inno3D GTX 680 2GB 
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