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Can my HX850 handle three 6950s? - Page 3

post #21 of 55
Yes but your psu wont handle a overclock. Or at least i wouldn't be comfortable overclocking them.

160-180w draw when stock on a full load each card.

Factor in a overclock cpu will be around a 120w -140w draw over estimating here.

And hdd and sdd and etc. Your getting close to that 850w. A overclocked cpu should be fine but i would worry if i had everything overclocked.
Edited by lilraver018 - 12/3/11 at 11:36pm
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post #22 of 55
That'll work.. Corsair PSUs are amazing quality. And for future reference, all your PSU questions->Phaedrus.
Quote:
Originally Posted by Lord Xeb View Post

xfire yes, trifire no
He holds firm! rolleyes.gif
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post #23 of 55
Only one way to find out? Remember to post back if your rig boots up nicely or if your house is on fire. biggrin.gif
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post #24 of 55
Here is a review with 6950's in tri fire, it shows that with a 2600k setup, it only pulls 538 watts. Granted, the 2600k is only at 4.0ghz, but still. I see this as a pretty good indication that hes going to be fine.
http://www.tomshardware.com/reviews/crossfire-sli-3-way-scaling,2865-11.html

This review puts the 6950 at ~158 watts, which indicates that the above review could be correct.
http://www.guru3d.com/article/radeon-6950-6970-review/11

The only problem with using the 850w is that you will have little head room to overclock all three cards.
post #25 of 55
At stock, three 6950 should be fine on 850W. However if you heavily overclock all three 6950's, it may be too close.
post #26 of 55
I would go with 1000 just to be safe ... if everything is overclocked e.g the cpu and all 3 gpu's then 850 just wont cut it , not by much though i dont think .

you want to supply those 3 cards and the cpu with all the power it needs , each 6950 uses 140w on idle and 250w on load .. so thats 750w for just the gpus + whatever for the cpu and other parts.

goodluck
Edited by Xristo - 12/3/11 at 11:58pm
    
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post #27 of 55
you are all g00d
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post #28 of 55
You could always run everything stock and just overclock when you decide on a higher wattage PSU. There's no point in overclocking 3x 6950s at this point anyway.
    
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post #29 of 55
more than enough.

6950 is a very power efficient graphics card

593

http://www.tomshardware.com/reviews/crossfire-sli-3-way-scaling,2865-11.html
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post #30 of 55
Yer you will be fine, corsair 850 is more like a 950. Even overclocked you will be fine. 9/10 people on OCN think you need an 850W PSU to run a single card and i5 because a 500-650W just WONT be powerful enough.

In Idle it will be 100% fine and not much more stress then 2 way. And underload even if it is 8 hours a day the PSU will still hold up.
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