[M0rga]

I have two questions, how do you know what power you require for your system? I have looked over the parts listed on an internet shop and it does not display what the watts are that they require. Secondly would it be ok to use a PSU that is supplied with a case or is it best to buy a case and a decent PSU seperately, if so any ideas on what price a good PSU is in pounds or who is a good make?
Thanks

[turtile]

http://www.extreme.outervision.com/psucalculator.jsp

You want to add more power over the rating since PSUs will be less efficient (waste energy) and will die faster if they run at the limits. They also will output less power over time.

[j12]

do not use psu's that come with cases unless they are something like antec. good psu brands would be antec, seasconic, pc power and cooling.