Can I use a PSU just for a graphics card?

zeyaa

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Feb 19, 2014
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Could I have two power supplies; one for my graphics card and one for the rest of my pc? If yes, how much watts would I need to run a gtx 770 alone? 300-350w?
 

OnkelCannabia

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Nov 9, 2013
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Since no one has answered yet, let me try. I can't see why it shouldn't work. You should make sure that the PSU delivers enough power on the +12V rail though. Just because a PSU has 350w doesn't mean it can deliver all that power just on the +12V rail.
 

Deuce65

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Oct 16, 2013
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Yes you can. At a minimum, you will need to either purchase a terminator for the motherboard power connector, or terminate it yourself. You will probably want to purchase or make a means to turn them both on at the same time.

But why not just get a proper PSU to begin with?
 

zeyaa

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I have a PSU that is 450w and is good and I don't want to buy like a 600-700 watt PSU when i only need a bit more power to power my GPU. In stead of paying like $80/£60 I would rather just pay like a third of that so I can power my GPU. Also, what do you mean by a terminator?
 

zeyaa

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Thank a lot! Do you think that it would work well? I would just get a nice 300W psu and run like a 770 :) I'd put it on top of my case and mod my case so i can connect my gpu to it.