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AMD 6950 Crossfired -> Recommended PSU wattage? - Page 5

post #41 of 63
Quote:
Originally Posted by compudaze View Post
I'm not the one arguing with you over it. If you read my posts, I agree.
I know. I'm just reiterating for the other poster.
    
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post #42 of 63
Quote:
Originally Posted by LOL_Wut_Axel View Post
Your rig isn't pulling even 500W at max load on all components.
How you figure? Or you just trollin'?

6 cores @4GHZ 1.525v

Two GPU's at 1000/1200 1.3v

Two 200mm fans @700RPM

Three 120mm LED fans @2000RPM

One 140mm fan @1700RPM

Two 80mm fans @ 4500RPM

One LCD fan controller

One DVDR

One HDD

One SSD

30% cap aging

I'd say it's pulling pretty damn hard when I all out stress/bench it.
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post #43 of 63
Quote:
Originally Posted by damric View Post
How you figure? Or you just trollin'?

6 cores @4GHZ 1.525v

Two GPU's at 1000/1200 1.3v

Two 200mm fans @700RPM

Three 120mm LED fans @2000RPM

One 140mm fan @1700RPM

Two 80mm fans @ 4500RPM

One LCD fan controller

One DVDR

One HDD

One SSD

30% cap aging

I'd say it's pulling pretty damn hard when I all out stress/bench it.
CPU is pulling 250W at max. load, the over-volted Radeon HD 6850s at max load are pulling around 325W, and peripherals 75W. Take into account 80% efficiency, the PSU has to produce 520W. My original estimates were based on over-clocked but not over-volted Radeon HD 6850s, which would pull around 280W. Based on the info you have on your sig, my info was right. Even then, you're only pulling around 520W now. 6850s use next to no power even if over-volted.

And cap aging is way over-rated by calculators, BTW.
    
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post #44 of 63
Thread Starter 
Quote:
Originally Posted by damric View Post
How you figure? Or you just trollin'?

6 cores @4GHZ 1.525v

Two GPU's at 1000/1200 1.3v

Two 200mm fans @700RPM

Three 120mm LED fans @2000RPM

One 140mm fan @1700RPM

Two 80mm fans @ 4500RPM

One LCD fan controller

One DVDR

One HDD

One SSD

30% cap aging

I'd say it's pulling pretty damn hard when I all out stress/bench it.
Maybe the 6850 is that much more efficient?
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post #45 of 63
Anyway, let's not derail this thread any further. OP, have you decided on what you'll get?
    
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post #46 of 63
Quote:
Originally Posted by Drybones5 View Post
Maybe the 6850 is that much more efficient?
He doesn't have a clue what he is talking about. I'd just ignore everything he says. He's obviously just trolling for the sake of trolling, which is unsuccessful at that. I just added him to my ignore list as it's quite obvious he has nothing intelligent to say here. I'll be happy to help you via PM.
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post #47 of 63
Quote:
Originally Posted by damric View Post
He doesn't have a clue what he is talking about. I'd just ignore everything he says. He's obviously just trolling for the sake of trolling, which is unsuccessful at that. I just added him to my ignore list as it's quite obvious he has nothing intelligent to say here. I'll be happy to help you via PM.
Oh, wow. I gave you a counterargument and supporting evidence and then you say I'm a troll. If you actually think your rig is pulling 800W, you're sorely mistaken.
Edited by LOL_Wut_Axel - 5/13/11 at 11:39pm
    
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post #48 of 63
Quote:
Originally Posted by damric View Post
Go for a quality 1000W. PSU's are more efficient at half load right?
Nnnnope. Follow the link in my signature and read the 50% load myth thread.


Edit: Wow, this thread got out of hand while I was playing Total War. Don't make me have to try out my mod powers so soon.

Damric, the calculators you are using are overestimating, in large part because you don't fully understand how to use them. Capacitor aging of 30% would take nearly a decade to occur with quality Japanese electrolytics. And I presume you're setting %TDP and %Load to 100% as well? Which gives you completely unrealistic figures.

The long and short of it is that you're wrong. I've recommended 650W PSUs to dozens of Crossfire 6850/6870/6950 users, and all of them work without hitch, often without even getting loud if it's a higher end unit. Give it up, mate.




OP: A quality 650W would be perfect for your needs.
Edited by Phaedrus2129 - 5/13/11 at 11:38pm
post #49 of 63
Thread Starter 
Quote:
Originally Posted by LOL_Wut_Axel View Post
Anyway, let's not derail this thread any further. OP, have you decided on what you'll get?
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post #50 of 63
Im using a 750w. No issues. And being a Thermaltake TR2, i doubt it's close to 750 in actuality.
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