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I have been advised that I need to buy a power supply unit. I have found some good deals on newegg.com on a few 500 watt models. I am just timid about setting it up...having to connect all those wires and cords scares me a little.

Are you guys using a psu on your trading computer?

If so, how hard was it to install?

Also, any other recommendations for me as I just bought a loaded computer and want to get everything in place for it.