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Is this PSU ok for a gtx 285 tri sli setup ?

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June 1, 2009 8:10:02 PM

I am making a gtx 285 tri sli setup with intel core i7 , mushkin or corsair 6 gb ddr3

I am going for the following mobo and Case

EVGA E758-TR 3-Way SLI (x16/x16/x8) LGA 1366 Intel X58 ATX Intel Motherboard

Antec Twelve Hundred Black Steel ATX Full Tower Computer Case

Is the following PSU enough for it :

Antec TruePower Quattro TPQ-1000 1000W Continuous Power ATX12V / EPS12V SLI Certified CrossFire Ready 80 PLUS BRONZE Certified

or should I go for

CORSAIR CMPSU-1000HX 1000W ATX12V 2.2 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS Certified Modular Active PFC Compatible with Core i7 Power Supply

I am saving some $40 by going with Antec. Need your advice.

Thank you in advance.

June 1, 2009 8:11:55 PM

both will fulfil your needs.
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June 1, 2009 9:05:21 PM

lol... no offense intended to the OP...

I just found it funny that the OP is spending all that money on that rig (which is going to rock btw, nice setup Julius) and then mentions the $40 savings.

Maybe it's the lack of sleep, but it made me laugh. :D 
June 1, 2009 9:45:16 PM

It looks like only the corsair come with enough power plugs for the GPUs. I think that you would be happy with just 2 GPUs in SLI. In tri-sli the slots will run as 8x not 16x as in sli. What CPU and what monitor will you be using. The bad thing is that some kid with a latop might kick you ass when playing online.
June 1, 2009 9:45:48 PM

@vertigo

Yeah ur right, this is what ive been doing all night, no sleep. but anyway, i just found out that the antec PSU has only 4 PCIe connectors while the Corsair one has 6 and each gtx 285 needs 2 connectors . so i guess corsair it is.
June 1, 2009 9:57:51 PM

@topper

I am gonna use intel core i7 920 and samsung 25.5 inch (1920 X 1200 ) (and I intend to put 8x AA on all games which i mean to play )
The only motherboard which i could find quickly on newegg, and having 3 X 16x PCIe slots was the EVGA E759 CLASSIFIED LIMITED EDITION which is wayyy too costly. So I need to know how much of a performance difference would occur if i run the three gpus at 8x PCIe ??? Is there any solution in your sight ?
June 1, 2009 11:44:12 PM

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

This board will run all three GTX285s @ x16, the one you have will run the first two @ x16 and the third @ x8. So there probably will not be a very noticeable difference between the two set-ups, however it might be more evident as the tri-sli becomes more effective at scaling in the years to come.
June 2, 2009 12:35:54 AM

Just get the regular EVGA board. You won't notice a difference between the 16x and 8x slots on those cards. Actually, I seem to remember that the motherboards with all 16x slots had slightly lower FPS due to limitations on the chipset.

Anandtech had an article on the Classified if you care to look for it.
June 2, 2009 9:00:29 AM

julius_caesar_01 said:
@topper

I am gonna use intel core i7 920 and samsung 25.5 inch (1920 X 1200 ) (and I intend to put 8x AA on all games which i mean to play )
The only motherboard which i could find quickly on newegg, and having 3 X 16x PCIe slots was the EVGA E759 CLASSIFIED LIMITED EDITION which is wayyy too costly. So I need to know how much of a performance difference would occur if i run the three gpus at 8x PCIe ??? Is there any solution in your sight ?

Two GTX 285's will be plenty, three is a waste. Honestly. Three GTX 285's can play any game at max settings at 25x16 resolution, your 1920x1200 res monitor will barely make two GTX 285's sweat. Stick them on the Asus P6T Deluxe V2, its the best board for SLI/crossfire due to the extra width between the PCIeX16 slots. That saves you like $450.

Look at these benchmarks:
http://www.anandtech.com/video/showdoc.aspx?i=3518&p=6

The human eye can't see anything much faster than 30FPS, most monitors can't display anything faster than 60FPS, ones that can will cost you about $500 at that size.

3 GTX 285's is just stupid on anything less than 2500x1600 resolution, and even then its overkill.
June 2, 2009 4:36:18 PM

+1 for thekid !

2 GTX285 is WAY enough paired with a nicely OCed I7 + 6gb ram.

June 2, 2009 4:48:49 PM

Two 4890's or GTX 275's or a GTX 295 would actually be plenty for that resolution, I think that two GTX 285's is still a waste of money, but its not as outrageous as three.
June 2, 2009 5:00:08 PM

Well, you would need to use adapters if you go with the Antec and that's always a pain. Both would be suitable, but I'd go with the Corsair simply for the amount of connectors you need :D .
June 2, 2009 9:59:27 PM

@ xthekidx

Well yes, I was thinking of getting 2 gtx 285 cards but wanted to leave an option for the third open. Secondly I plan to keep this system for some time and wish to play all incoming games with 1920 X 1200 res at 8x AA with max eye candy, atleast for about a year. Will 2 gtx 285 cards suffice for this ??

I saw the recent article on tomshardware which featured a gtx 295 quad SLI setup
http://www.tomshardware.com/reviews/micro-atx-sff,2311-...
shows the setup getting a bit of sweat when we turn on 4x AA at 1920 X1200. I am not sure if a gtx 285 dual SLI setup will pull the load till maybe march next year for similarly demanding games which are coming out these days??
June 2, 2009 10:15:26 PM

Two GTX 285's will be just fine.

Those SBM articles do not apply to your PC, since you are not building a mATX computer. Those PC's were severely limited by airflow and heat, and could not function the way they would in a full sized chasis. And 50FPS in a poorly optimized game like Stalker or Crysis is very respectable, those games are not written well and are therefore very hard on PC hardware. Two GTX 285's will be more than enough to last you until march 2010 if that is your goal.
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