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post #11 of 48
Quote:
Originally Posted by Chris13002 View Post
It's not, I just came from an Corsair TX750W and it definitely throttled... The cards didn't get enough power and I noticed a constant lag every 2 seconds or so... Unplayable with settings on max(Metro 2033) and 3dmark11... My system was stock but I had 2 SSD's, 2HDDs, and a case with 6 fans...
Then you had a bad PSU or something else was messed up. A TX750W would run 2x 580s with that stuff just fine.

Oh, and the PSU not being powerful enough would not "throttle" the GPU and cause "constant lag." So you're completely off base there.
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post #12 of 48
Quote:
Originally Posted by Chris13002 View Post
It's not, I just came from an Corsair TX750W and it definitely throttled... The cards didn't get enough power and I noticed a constant lag every 2 seconds or so... Unplayable with settings on max(Metro 2033) and 3dmark11... My system was stock but I had 2 SSD's, 2HDDs, and a case with 6 fans...
thats a high quality psu, the peak should be maybe around 800/850W, who knows...really odd.
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post #13 of 48
Quote:
Originally Posted by Plex View Post
Then you had a bad PSU or something else was messed up. A TX750W would run 2x 580s with that stuff just fine.

Oh, and the PSU not being powerful enough would not "throttle" the GPU and cause "constant lag." So you're completely off base there.
Maybe... thats just my experience... I personally wouldn't recommend a 750 watt... it would be like walking on egg shells if you do lots of heavy gaming and benchmarks...
Upgrading the PSU fixed my issue and if one graphics card isn't getting enough power, why wouldn't it slow down?
To be safe definitely go 850 and above...

It was a 2 year old PSU and handled my GTX 295 and one 580 just perfectly fine... maybe just got old...
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post #14 of 48
Thread Starter 
I have only my mother board ,i7 875 at 4 gh ,2 hard drive 300 gb each and 4 fans and a CPU cooler and Gtx 580 I want them at stock not over clock now
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post #15 of 48
Quote:
Originally Posted by Chris13002 View Post
It's not, I just came from an Corsair TX750W and it definitely throttled... The cards didn't get enough power and I noticed a constant lag every 2 seconds or so... Unplayable with settings on max(Metro 2033) and 3dmark11... My system was stock but I had 2 SSD's, 2HDDs, and a case with 6 fans...
I have a Seasonix 750 and have run my rig with two 580 with no problems. And not enough power doesn't "throttle" anything - it shuts off.

For the record I have 2 SSD's, 2 mechanical drives an h50 5 fans and both cards were running at 880 core.

A good 750 can do it no sweat.

Edit: So the question remains, which 750 are you thinking about?
post #16 of 48
Quote:
Originally Posted by Chris13002 View Post
Maybe... thats just my experience... I personally wouldn't recommend a 750 watt... it would be like walking on egg shells if you do lots of heavy gaming and benchmarks...
Upgrading the PSU fixed my issue and if one graphics card isn't getting enough power, why wouldn't it slow down?
To be safe definitely go 850 and above...
http://www.jonnyguru.com/modules.php...Story2&reid=73 Corsair TX750W Power Supply Review

939W
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post #17 of 48
Well if you got a 750 watt now, use it but I wouldn't recommend it for someone buying a new PSU for that setup. Lots of other forums agree with gtx 580 sli...

http://www.evga.com/forums/tm.aspx?m=682410&mpage=1
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post #18 of 48
Look at this:

http://www.guru3d.com/article/geforc...-sli-review/14 719W for the whole system

get 850W to be safe.
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post #19 of 48
Quote:
Originally Posted by Chris13002 View Post
Well if you got a 750 watt now, use it but I wouldn't recommend it for someone buying a new PSU for that setup. Lots of other forums agree with gtx 580 sli...

http://www.evga.com/forums/tm.aspx?m=682410&mpage=1
lol that thread is filled with people that have no idea what they're talking about.
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post #20 of 48
http://www.newegg.com/Product/Produc...82E16817371050
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