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Seasonic X650 for i7 970 + 6970 CFX

post #1 of 38
Thread Starter 
Will the X650 be enough for my sig rig minus the 6870 and plus a couple of unlocked 6950's (6970's) in CrossfireX?

For reference, my sig rig currently pulls ~427 watts from the wall with Furmark running in Xtreme Burning Mode 8xAA 1080p and folding@home running. My PSU's efficiency at this level of load and room temperature should be around 90-92%... with DC input in the 380-400 watt range.

I'm guessing it would run just fine short-term but may have an impact on my PSU's longevity if I fold + game regularly... any thoughts?
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post #2 of 38
Absolutely not.
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post #3 of 38
Should be fine.
post #4 of 38
Quote:
Originally Posted by Evtron View Post
Absolutely not.
I think your underastimating the X-650W

i think it should be able to run it fine.

http://www.overclock.net/power-suppl...-supplies.html in this thread you can ask our PSU experts.

EDIT:
the expert has spoken

Quote:
Originally Posted by Phaedrus2129 View Post
Should be fine.
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post #5 of 38
Thread Starter 
Hmmm... I sense some dissent.

Does this website hold any relevance whatsoever?

http://extreme.outervision.com/PSUEngine

I calculated a minimum PSU wattage of 766W and recommended wattage of 816W. I know the X650 has been tested by jonnyguru to maintain over 80% efficiency with 750W of DC input... but... wouldn't that be pushing it?
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post #6 of 38
It will work fine.

And PSU calculators are incorrect.
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post #7 of 38
Quote:
Originally Posted by aznofazns View Post
Hmmm... I sense some dissent.

Does this website hold any relevance whatsoever?

http://extreme.outervision.com/PSUEngine

I calculated a minimum PSU wattage of 766W and recommended wattage of 816W. I know the X650 has been tested by jonnyguru to maintain over 80% efficiency with 750W of DC input... but... wouldn't that be pushing it?
No, PSU calculators are absolute crap.

If phaedrus says you can run it, it will be able too.

Unless you are planning to add another 6870 you should get the X-650!
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post #8 of 38
Thread Starter 
Quote:
Originally Posted by 1337LutZ View Post
No, PSU calculators are absolute crap.

If phaedrus says you can run it, it will be able too.

Unless you are planning to add another 6870 you should get the X-650!
I already have the X650, just wondering if I can ditch my 6870 and grab a couple 6970's in the near future for triple 1080p CrossfireX.

But thanks for the speedy replies, everyone.

As a second question, anyone have experience unlocking 6950's? Is the success rate pretty high? Figured I would just ask here for some quick input.
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post #9 of 38
Quote:
Originally Posted by Evtron View Post
Absolutely not.
lol
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post #10 of 38
I have heard that the 6950 has a pretty high success rate for unlocking and for it not to unlock is pretty rare.

Also an off topic question. Why is your 6870 voltage so high for those clocks? I got my second 6870 today (First one sent to RMA until it comes back) and I get 1030/1150 on 1.193 volts.

And the X-650 should be fine for what your getting especially if it's 6950's.
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Overclock.net › Forums › Components › Power Supplies › Seasonic X650 for i7 970 + 6970 CFX