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GTX 580 SLI on a 850W PSU?

post #1 of 14
Thread Starter 
Hai, I put my sig rig together a month ago or so and it's working wonders but as I always strive for better hardware I already plan to upgrade to 580 SLI maybe around christmas or so, but just wondering so I have it clear already, do you think I will have to get a new PSU aswell or should I be fine with my 850W?

I think it will be pretty close, maybe especially with my overclocked CPU but I'm pretty new to hardware, especially the power thing, I hardly know what VRM's are and how they work so I figured I'd ask instead of just going ahead!
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post #2 of 14
As long as it is efficent, it is a go. Despite my hatred for my temp TR2 PSU, its running decent with dual 580s at 1.2vs
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post #3 of 14
850W should be fine for 580 sli even if they are overclocked. you will only run into problems if you try to go to 3 way sli or something similar.
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post #4 of 14
I honestly think it will run if you DON"T overclock the gpu's.
but others will say.. at least a 1k watt psu will do you fine..
And since you overclocked your cpu... I promise you, you're gonna want to overclock your gpu's.. just to even out the overclocking department.
1k psu gets my vote....for sli 580's....
v1ral
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post #5 of 14
Quote:
Originally Posted by Recluse View Post
Hai, I put my sig rig together a month ago or so and it's working wonders but as I always strive for better hardware I already plan to upgrade to 580 SLI maybe around christmas or so, but just wondering so I have it clear already, do you think I will have to get a new PSU aswell or should I be fine with my 850W?

I think it will be pretty close, maybe especially with my overclocked CPU but I'm pretty new to hardware, especially the power thing, I hardly know what VRM's are and how they work so I figured I'd ask instead of just going ahead!
A GTX 580 is a 250W card which in games/3DMark 11 etc uses about of 220W of power. CLICK HERE

So in short your CM 850W PSU is more than enough for that setup even with CPU and GPU overclocking..

CHEERS..
Edited by KingT - 3/27/11 at 3:49pm
     
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post #6 of 14
Your PSU will more than suffice even with them OC'd.
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post #7 of 14
Thread Starter 
Ok, thanks a lot, + rep for you guys! I won't be doing 3-way SLI, I think 580 SLI and i7 950 @ 4 GHz (more soon maybe? Got a pretty good vcore so still got some headroom) should last me for a good amount of time.
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Intel i7 950 @ 4 GHz 1.22v ASUS Rampage III Extreme Gainward GTX 580 Corsair Dominator GT 2000 MHz CL8 6GB 
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Intel X25 40GB SSD + WD Caviar Black 1TB Normal DVD one! Windows 7 Ultimate (64 bit) Benq T2210HD 21,5" 
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First build
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CPUMotherboardGraphicsRAM
Intel i7 950 @ 4 GHz 1.22v ASUS Rampage III Extreme Gainward GTX 580 Corsair Dominator GT 2000 MHz CL8 6GB 
Hard DriveOptical DriveOSMonitor
Intel X25 40GB SSD + WD Caviar Black 1TB Normal DVD one! Windows 7 Ultimate (64 bit) Benq T2210HD 21,5" 
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Razer BlackWidow Ultimate ordered! Cooler Master Silent Pro 850W Corsair Obsidian 800d Razer Mamba 
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Razer Destructor 
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post #8 of 14
I've heard people running SLI GTX 570's on a 650w PSU with no problems, so SLI 580's on a 850w should give you no problems.
post #9 of 14
A quality 850W will easily power two overclocked 580's, as well as an i7.
    
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post #10 of 14
You have one of the best boards for overclocking, and you can run two 580's just fine and dandy
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