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Repair guides and support for desktop computers produced by Asus including towers and all-in-one display PCs.

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How to correctly replace PSU for my desktop?

Hi,

My PSU broke down and a need new one. I know how many watts I need (probably 550) but I hear people talk about checking voltages before installing a new one or my pc would "blow up".

How do I check which voltages I need, which voltages the PSU uses and how to install it correctly without burning down my pc (and my house).

If someone could help me that would be great!

Thanks

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2 Answers

As long as its the same wattage and same type you should be fine. blowing something up was a thing of the passed with people overclocking and not using surge protectors. With that said do not plug it in to power first and then to the motherboard ಠ▃ಠ .

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Joe, I looked at your profile. How many people in the world do you think know what a ITAD business is?

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My money is on this is our youngest established active member under pseudonym or the person(s) responsible for getting the limited voting rights invoked on us.

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Well all I can tell you, is that the owner of ifixit knows.

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If you are concerned about the Voltages you can look up your computers specs online through the manufacturers website. I dont think you have too much to worry about if you did not overclock the computer and its not a custom built model. I would suggest even just looking at your psu's make and model, and getting one similar. You should be able to also find the voltages on the psu itself or on the psu's brands website for that model. And remember it is better to go higher in wattage then lower. so if you can not seem to find a 550w that fits but you see a 600w go with the 600w never go lower.

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oh. I forgot to mention to keep in mind the dimensions of your psu that came with the computer when ordering/purchasing a new one. Last thing you want to do is order one that does not fit.

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@Drogonlady, I mean Nick, excuse me Dradonkitty. PSU's are manufactured to ISA standards. They all put out the same amount of voltage to the same pin out. The only difference, in the same ISA pin out configuration, is how much wattage they can handle for the same pin out. Obviously not all PSUs work with all motherboards but, in those cases you can't connect the 2 without cutting the wires and splicing in the connectors. There is no need to worry about what voltage goes where, unless you are splicing into wires and changing connectors.

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