GTX 580 2-way SLI power requirements? 1KW minimum?
If I were to buy two GTX 580's in SLI, what is the minimum recommended power supply? An 850W (my current PSU) probably wouldn't cut it. Perhaps a 1KW or 1.2KW?

What about 3-way SLI GTX 580's? Do I need the silverstone 1,500W PSU to fully power those monsters?
If I were to buy two GTX 580's in SLI, what is the minimum recommended power supply? An 850W (my current PSU) probably wouldn't cut it. Perhaps a 1KW or 1.2KW?



What about 3-way SLI GTX 580's? Do I need the silverstone 1,500W PSU to fully power those monsters?

An infinite number of Monkeys, using an infinite number of typewriters, given an infinite amount of time, will eventually print up Shakespeare's entire works.

#1
Posted 04/19/2011 04:29 PM   
A GTX 580 requires 244 W according to its specs. So 850 W PSU will be kind of cutting it too close for comfort. More than the watts themselves, the amps (current) might become a touch short if the PSU isn't one of the best. And if you are overclocking, it definitely won't be enough.

Apart from that, as the PSU gets older and is no longer as robust as it was before, you will find lot of problems even if by some good luck, you do manage to get SLI GTX 580s to run on a 850 W PSU. I haven't heard of anyone trying it actually though.

For 2-way SLI, I'd recommend a Corsair HX 1000 W PSU. It's got awesome quality of circuitry with excellent d.c regulation and is the hands down favorite for a lot of people I guess. If you want 3-way SLI, a 1200 W PSU will run fine.
A GTX 580 requires 244 W according to its specs. So 850 W PSU will be kind of cutting it too close for comfort. More than the watts themselves, the amps (current) might become a touch short if the PSU isn't one of the best. And if you are overclocking, it definitely won't be enough.



Apart from that, as the PSU gets older and is no longer as robust as it was before, you will find lot of problems even if by some good luck, you do manage to get SLI GTX 580s to run on a 850 W PSU. I haven't heard of anyone trying it actually though.



For 2-way SLI, I'd recommend a Corsair HX 1000 W PSU. It's got awesome quality of circuitry with excellent d.c regulation and is the hands down favorite for a lot of people I guess. If you want 3-way SLI, a 1200 W PSU will run fine.

#2
Posted 04/19/2011 04:45 PM   
Just wanted to add that the monkey is really cute. And you will want to add "with an infinite amount of mistakes" to the quote in your sig.
Just wanted to add that the monkey is really cute. And you will want to add "with an infinite amount of mistakes" to the quote in your sig.

#3
Posted 04/19/2011 04:48 PM   
A single 580 requires ~700W (i think minimum is 600) dual will run fine on 850,but you will be cutting it too close,like G.Abhinav said.Your PSU will be running at peak wattage a lot of times.There will be no OC'ability,and as age progresses the PSU quality will decline.

900W will be fine without any OC and if you wanna OC then 1000W minimum.If you want PSU to be a long term thing get the Corsair AX-1200.It has 7 years performance warrany and can handle anything you throw at it in future.
A single 580 requires ~700W (i think minimum is 600) dual will run fine on 850,but you will be cutting it too close,like G.Abhinav said.Your PSU will be running at peak wattage a lot of times.There will be no OC'ability,and as age progresses the PSU quality will decline.



900W will be fine without any OC and if you wanna OC then 1000W minimum.If you want PSU to be a long term thing get the Corsair AX-1200.It has 7 years performance warrany and can handle anything you throw at it in future.

Core i7 960 @4.14Ghz 180x23 1.3v Liquid cooled

Gigabyte G1. Assassin

EVGA GTX 560 Ti "Maximum Graphics Crysis 2"

Cooler Master HAF-X

Corsair Dominator GT CMT12GX3M3A2000C9 RAM

RMA broke my 580 SLI. Now I have a 7970 and a GTX 580 gathering dust, looking for a buyer.

#4
Posted 04/19/2011 04:53 PM   
[quote name='Ultimate PC Man' date='19 April 2011 - 08:53 AM' timestamp='1303232001' post='1227282']
A single 580 requires ~700W (i think minimum is 600) dual will run fine on 850,but you will be cutting it too close,like G.Abhinav said.Your PSU will be running at peak wattage a lot of times.There will be no OC'ability,and as age progresses the PSU quality will decline.

900W will be fine without any OC and if you wanna OC then 1000W minimum.If you want PSU to be a long term thing get the Corsair AX-1200.It has 7 years performance warrany and can handle anything you throw at it in future.
[/quote]

How much power does a single (stock clock) GTX 580 draw at 100% load?
[quote name='Ultimate PC Man' date='19 April 2011 - 08:53 AM' timestamp='1303232001' post='1227282']

A single 580 requires ~700W (i think minimum is 600) dual will run fine on 850,but you will be cutting it too close,like G.Abhinav said.Your PSU will be running at peak wattage a lot of times.There will be no OC'ability,and as age progresses the PSU quality will decline.



900W will be fine without any OC and if you wanna OC then 1000W minimum.If you want PSU to be a long term thing get the Corsair AX-1200.It has 7 years performance warrany and can handle anything you throw at it in future.





How much power does a single (stock clock) GTX 580 draw at 100% load?

An infinite number of Monkeys, using an infinite number of typewriters, given an infinite amount of time, will eventually print up Shakespeare's entire works.

#5
Posted 04/19/2011 11:24 PM   
~200-225 max.
~200-225 max.

Core i7 960 @4.14Ghz 180x23 1.3v Liquid cooled

Gigabyte G1. Assassin

EVGA GTX 560 Ti "Maximum Graphics Crysis 2"

Cooler Master HAF-X

Corsair Dominator GT CMT12GX3M3A2000C9 RAM

RMA broke my 580 SLI. Now I have a 7970 and a GTX 580 gathering dust, looking for a buyer.

#6
Posted 04/20/2011 01:52 AM   
[quote name='Monkey_Business' date='19 April 2011 - 03:24 PM' timestamp='1303255471' post='1227522']
How much power does a single (stock clock) GTX 580 draw at 100% load?
[/quote]
[quote name='G.Abhinav' date='19 April 2011 - 08:45 AM' timestamp='1303231528' post='1227271']
[color="#00FF00"]A GTX 580 requires 244 W according to its specs[/color].
[/quote]
[quote name='Monkey_Business' date='19 April 2011 - 03:24 PM' timestamp='1303255471' post='1227522']

How much power does a single (stock clock) GTX 580 draw at 100% load?



[quote name='G.Abhinav' date='19 April 2011 - 08:45 AM' timestamp='1303231528' post='1227271']

A GTX 580 requires 244 W according to its specs.

#7
Posted 04/20/2011 06:42 AM   
I have seen my PC pull over 900W at the wall.

You could probably get away with it on a really decent 850W PSU. Personally I would not blow a tonne of cash on graphics cards only to skimp on the PSU.

When you think about it, my 1500W PSU was only 1/5th the cost of my GPUs. I would rather have that investment solidly protected with good hardware.
I have seen my PC pull over 900W at the wall.



You could probably get away with it on a really decent 850W PSU. Personally I would not blow a tonne of cash on graphics cards only to skimp on the PSU.



When you think about it, my 1500W PSU was only 1/5th the cost of my GPUs. I would rather have that investment solidly protected with good hardware.
I'd be careful with multi-rail <1000W PSU's, make sure you can actually get enough current to the cards. There are some completely brain dead configurations out there.
I use a 1200W with a single rail ( not the Corsair ) but only because I could get it locally.
I'd personally think that any single rail design over 950W would be fine even with an overclock, unless your PC has a lot of connected peripherals.

But as Raptor said, your spending >$1K on cards, get a decent PSU.

There is a graph over at Geeks3D that shows a single GTX580 pull over 300W in Furmark before the overcurrent protection kicks in and 350W with it disabled.
[url="http://www.geeks3d.com/20101115/geforce-gtx-580-unlocked-350w-under-furmark-thanks-to-gpu-z/"]GTX580 Furmark[/url]
I'd be careful with multi-rail <1000W PSU's, make sure you can actually get enough current to the cards. There are some completely brain dead configurations out there.

I use a 1200W with a single rail ( not the Corsair ) but only because I could get it locally.

I'd personally think that any single rail design over 950W would be fine even with an overclock, unless your PC has a lot of connected peripherals.



But as Raptor said, your spending >$1K on cards, get a decent PSU.



There is a graph over at Geeks3D that shows a single GTX580 pull over 300W in Furmark before the overcurrent protection kicks in and 350W with it disabled.

GTX580 Furmark
#9
Posted 04/20/2011 03:19 PM   
[quote name='ERP' date='20 April 2011 - 07:19 AM' timestamp='1303312778' post='1227879']
I'd be careful with multi-rail <1000W PSU's, make sure you can actually get enough current to the cards. There are some completely brain dead configurations out there.
I use a 1200W with a single rail ( not the Corsair ) but only because I could get it locally.
I'd personally think that any single rail design over 950W would be fine even with an overclock, unless your PC has a lot of connected peripherals.

But as Raptor said, your spending >$1K on cards, get a decent PSU.

There is a graph over at Geeks3D that shows a single GTX580 pull over 300W in Furmark before the overcurrent protection kicks in and 350W with it disabled.
[url="http://www.geeks3d.com/20101115/geforce-gtx-580-unlocked-350w-under-furmark-thanks-to-gpu-z/"]GTX580 Furmark[/url]
[/quote]

I've seen the Silverstone 1,500 PSU powering 4-way SLI GTX 480 during a furmark torture test. I think the total energy consumption was cutting it extremely close, like 1,420W.
[quote name='ERP' date='20 April 2011 - 07:19 AM' timestamp='1303312778' post='1227879']

I'd be careful with multi-rail <1000W PSU's, make sure you can actually get enough current to the cards. There are some completely brain dead configurations out there.

I use a 1200W with a single rail ( not the Corsair ) but only because I could get it locally.

I'd personally think that any single rail design over 950W would be fine even with an overclock, unless your PC has a lot of connected peripherals.



But as Raptor said, your spending >$1K on cards, get a decent PSU.



There is a graph over at Geeks3D that shows a single GTX580 pull over 300W in Furmark before the overcurrent protection kicks in and 350W with it disabled.

GTX580 Furmark





I've seen the Silverstone 1,500 PSU powering 4-way SLI GTX 480 during a furmark torture test. I think the total energy consumption was cutting it extremely close, like 1,420W.

An infinite number of Monkeys, using an infinite number of typewriters, given an infinite amount of time, will eventually print up Shakespeare's entire works.

#10
Posted 04/21/2011 10:42 PM   
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