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Hardware too much for my 750W PSU?

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July 10, 2012 3:50:00 AM

Hello, I'm running a i7 920 at stock speed (2.66GHz) w/ 6GB @ 1333MHz and a GTX560Ti @ 950MHz (usually) , I was thinking about installing another 560Ti and running them in SLI. Do you think my power needs will exceed what my power supply can deliver? Thank you for your help in advance!

More about : hardware 750w psu

July 10, 2012 4:01:18 AM

You're almost definitely fine (most respectable 650W PSUs can handle 560 Ti's in SLI) but just to make sure, give us the model of your PSU. It's not just the wattage that matters.
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a c 140 ) Power supply
July 10, 2012 4:26:26 AM

Here we see that the 560 Ti has a system load of 455 watts with the card overclocked
http://www.overclockersclub.com/reviews/nvidia_asus_gtx...

Here we see each card pulls about 176 watts
http://www.guru3d.com/article/asus-gtx560-directcu-ii-r...

And nVidia says 170 watts (non OC)

That's a draw of 625ish which I'd call a bit too much for a 650 watter....a 750 watter would be comfy but with capacitor aging to consider over time and a lil headroom for voltage stability and noise reduction, I'd use a 850 watter for OC'd CPU and OC'd GPU's in SLI. At stock, the 850 would be just fine.

nVidia recommends 670 minimum (500+170) for SLI
http://www.geforce.com/hardware/desktop-gpus/geforce-gt...


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July 10, 2012 4:30:54 AM

JackNaylorPE said:
Here we see that the 560 Ti has a system load of 455 watts with the card overclocked
http://www.overclockersclub.com/reviews/nvidia_asus_gtx...

Here we see each card pulls about 176 watts
http://www.guru3d.com/article/asus-gtx560-directcu-ii-r...

And nVidia says 170 watts (non OC)

That's a draw of 625ish which I'd call a bit too much for a 650 watter....a 750 watter would be comfy but with capacitor aging to consider over time and a lil headroom for voltage stability and noise reduction, I'd use a 850 watter for OC'd CPU and OC'd GPU's in SLI. At stock, the 850 would be just fine.

nVidia recommends 670 minimum (500+170) for SLI
http://www.geforce.com/hardware/desktop-gpus/geforce-gt...

Not trying to go against what you said as I'm sure you have more experience in this area than I do, but I run 2 OC'd 6950's (which use more power than 560 Ti's) in crossfire on a TX650V2 with ease. And my CPU's OC'd too.
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a b ) Power supply
July 10, 2012 6:01:32 AM

You'll probably be fine. My system with 2 560ti 448 and a 3930k, all oc'd, barely pulls 500w at maximum load...and that's out of the wall, so less than 450 from the psu. An 850 might be better, but its not worth upgrading.
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