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uk power supply in us computer

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I am in the military stationed in the UK with HP desk top that i bought from on base. I just bought a new video card that needs a 450W power supply where mine is only 300W. I cannot order one from a US site I have found yet as they won't ship to APO addresses. So my question is if I got and buy a UK power supply that runs on 220v will work with my computer. I do not believe the voltage is an issue I'm mainly worried that it won't even fit in my computer?
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Neil Jones

Neil Jones

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The voltage most definitely WILL be an issue later down the line if you normally live in the US and take the system back with you.

UK power is 230v. US power is 110v. You feed 230v through something that is expecting 110v and it will literally blow up and most likely wipe the entire system out.
Now as things stand it will be fine on UK power, some PSUs have a voltage toggle ability that you can use to switch between 110v and 230v for if you take it back to the US with you. But don't fiddle with it while the PC is on...
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