Power Supply for GTX580 SLI

[Johnshardware73]

This has been answered before I am sure but I am considering a second EVGA GTX580 for my setup. Currently I have the following.

CPU: Intel i7 860 @ 2.8 ghz
Memory: 8 GB 1600 XMS Corsair
Hard Drives: 3 @ 7200rpm
Fans: one intake and exhaust.
GPU: EVGA GTX580
PSU: Corsair HX1050 with 87.5A on the 12 Volt Rail.

Will the PSU handle an additional GTX580 ? They are cheap now on EBAY and understand 2 580's will beat a 680.

I want to be sure I am operating in a safe area. Previously I had a Corsair 750watt handling the rig but experienced a complete shutdown and then bought the HX1050 and have a very stable system currently. Reason for adding is the new games out and coming out. My display is 1920 x 1080p.

Thanks in advance.

John

 

[Johnshardware73]

This has been answered before I am sure but I am considering a second EVGA GTX580 for my setup. Currently I have the following.

CPU: Intel i7 860 @ 2.8 ghz
Memory: 8 GB 1600 XMS Corsair
Hard Drives: 3 @ 7200rpm
Fans: one intake and exhaust.
GPU: EVGA GTX580
PSU: Corsair HX1050 with 87.5A on the 12 Volt Rail.

Will the PSU handle an additional GTX580 ? They are cheap now on EBAY and understand 2 580's will beat a 680.

I want to be sure I am operating in a safe area. Previously I had a Corsair 750watt handling the rig but experienced a complete shutdown and then bought the HX1050 and have a very stable system currently. Reason for adding is the new games out and coming out. My display is 1920 x 1080p.

Thanks in advance.

John

Forgot to add that I am also running a Creative XFi Extreme Gamer sound card and DVD drive.

 

[maxalge]

850w would run your system no problem with 2 gtx 580.


Your corsair would have no issues.

 

[Thorran]

850w would run your system no problem with 2 gtx 580.


Your corsair would have no issues.

That's not entirely accurate. I recently ran into an issue with my 850w not powering the 580s and here's what I found. It all depends on your amperage. 2 580s in SLI with only require about 770 watts and that's at stress testing, but they also require about 40 amps at 12 volts each. Now if you are running 2 in SLI, a 60-70 amp PS will be enough unless you plan on stress testing. I wanted to play it safe, since running without enough amps can fry your motherboard so I got a 1200watt 100 amp (http://www.newegg.com/Product/Product.aspx?Item=N82E16817139039). I wouldn't recommend trying to run them on less than 50 amps or you maybe be out a $1000 motherboard. Hope that helps.

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