[IF06]

I believe the category that list ATX, Micro-Atx, etc etc, has something to do with the motherboard (seeing motherboards listed with those keywords). Am I wrong?

In buying a PSU, what should I consider the most relevent aspect of it (aside from the wattage that it delivers).

[aliasaid]

Amerpage on the 12V rail. (depending on your system, you'd want it in the 25-40 range)

weight. heavier PSU's tend to be of higher quality

brand. get a reliable brand (fsp fortron, antec, enermax, etc)

[IF06]

Ok im looking for a wattage of around 400 - 550

do you know of any good one? its still hard for me to choose the psu, i havent really focused my research on psu's, aside from wattage requirements

my budget is up to 70 and ive seen some psu round my preference but i dunno if they're any good

[aliasaid]

http://www.newegg.com/Product/Produc...82E16817104954

http://www.newegg.com/Product/Produc...82E16817103937

http://www.newegg.com/Product/Produc...82E16817103464

http://www.newegg.com/Product/Produc...82E16817103457

http://www.newegg.com/Product/Produc...82E16817103928

http://www.newegg.com/Product/Produc...82E16817103931

http://www.newegg.com/Product/Produc...82E16817104953

any of these will do.. probably that last one is best value...

[IF06]

what happens with the fans located on top of the psu's? do we install holes at the top of the case? (not considering the psu's with the rear located fans)