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HX850W enough to handle 580 SLI 3GB Classified? - Page 2

post #11 of 40
Quote:
Originally Posted by Cryptedvick View Post
Yes its enough. Even if you plan on overclocking.
It seems that everybody still is on the overestimating power draw bandwagon.
+1 to this.
    
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post #12 of 40
Quote:
Originally Posted by Schmuckley View Post
oh..if you're not planning on OCing cards/cpu..then yes! if you are..i'd go for a little more headroom...
No. Just no.
A 850W will handle two OC'd 580's with no issues. You could push them to 1ghz core and have no issues with a 2600k @ 5ghz.
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post #13 of 40
Quote:
Originally Posted by Cryptedvick View Post
Yes its enough. Even if you plan on overclocking.
It seems that everybody still is on the overestimating power draw bandwagon.

edit: check this thread: http://www.overclock.net/power-suppl...alculator.html
I still disagree.

I fried a 850 last week with sample 580 classifieds in SLI on a I7 950 stock clocks.

I think the vast majority of you are underestimating what the cards are capable of plus he already has an existing OC...

So, again, I'd go 1000w just to get the headroom.
post #14 of 40
Quote:
Originally Posted by csm725 View Post
No. Just no.
A 850W will handle two OC'd 580's with no issues. You could push them to 1ghz core and have no issues with a 2600k @ 5ghz.
Even with this kind of OC it will handle it however it would be cutting it a little close. Not that the PSU can't take it.

Quote:
Originally Posted by Masked View Post
I still disagree.

I fried a 850 last week with sample 580 classifieds in SLI on a I7 950 stock clocks.

I think the vast majority of you are underestimating what the cards are capable of plus he already has an existing OC...

So, again, I'd go 1000w just to get the headroom.
I don't know under what circumstances that happened but it shouldn't have happened.
Maybe (however I doubt it) it would if you ran furmark on both GPUs and IBT on the CPU but that kind of load will never ever happen in any game or even folding on both GPUs + the CPU.
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post #15 of 40
Sample 580 classies. They could be the ones at fault here, and they're capable of taking the PSU down with them. Did it happen with released 580s?
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post #16 of 40
Check this EVGA benchmark power draw test:
http://benchmarkreviews.com/index.ph...&limitstart=11

Also, don't plan on using PSU at 100% capacity - or close - as it loses efficiency, overheats.

To be on the safe side, I'd go for for a quality 1000W PSU.
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post #17 of 40
Quote:
Originally Posted by Cryptedvick View Post
Even with this kind of OC it will handle it however it would be cutting it a little close. Not that the PSU can't take it.

I don't know under what circumstances that happened but it shouldn't have happened.
Maybe (however I doubt it) it would if you ran furmark on both GPUs and IBT on the CPU but that kind of load will never ever happen in any game or even folding on both GPUs + the CPU.
They were both over 1000mhz, can tell you that much.

While I agree it is "enough", I feel as if he's already roofing it.

The classifieds are capable of great things and while I'm the king of overkill, even in his situation, I'd go for a 1000w.

Burned out a brand new Corsair TX850M...I mean like opened 20 minutes before we benched it...So...Airing on the side of overkill, I'd go for a 1000w anyway.

Quote:
Originally Posted by csm725 View Post
Sample 580 classies. They could be the ones at fault here, and they're capable of taking the PSU down with them. Did it happen with released 580s?
Have never had a sample blow out a PSU so, I'd have to say no...Plus, Corsair said it was simply the draw was too much on the PSU...So, I have to side with Corsair.

They actually draw less then our released classifieds, too.
post #18 of 40
The X850 should handle them fine. Some Corsair units are not up to snuff, although meh. It's very unlikely that a quality 850W unit dies from two 580's.
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post #19 of 40
Quote:
Originally Posted by Masked View Post
They were both over 1000mhz, can tell you that much.

While I agree it is "enough", I feel as if he's already roofing it.

The classifieds are capable of great things and while I'm the king of overkill, even in his situation, I'd go for a 1000w.

Burned out a brand new Corsair TX850M...I mean like opened 20 minutes before we benched it...So...Airing on the side of overkill, I'd go for a 1000w anyway.
Well, to be fair , over 1Ghz core and obviously a lot of overvoltage would stress a less efficient TX850 (compared to OP's HX850) to hell and back.
However, this was under extreme circumstances. If you're that kind of person that goes to these extremes, then yes, a 1000W PSU would suit you better, however, the OP is not even interested in overclocking these cards so it would be pointless to get a 1KW PSU because he would still have plenty of headroom even with both cards at full load.
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post #20 of 40
OP you really ought to take this question to the PSU section, the people here are having way too much trouble with this question. Those saying a kilowatt might do well to hear what the PSU experts in there have to say to you as well.
Edited by juano - 10/4/11 at 6:48am
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