oh one more thing how many watts do i need for a single computer with one gpu? i have three old dell desktop that i want to mine with. what are the cheapest psu that I could run 24/7?
Depends on what GPU you are looking to run. PC Power & Cooling makes a nice 500W Dell compatible PSU for about $75 (model PPCS500D and free shipping from Amazon). Mine got changed out on Friday (on a Dell Optiplex 745) and has been humming along nicely with a 5770 since then.
5830 do i need a 500w for a single computer? tools_462 is running three of them on a 600w Seasonic.