Possible Duplicate:
How to choose a UPS / calculate power for a new PC
It seems to be a common question here, but I want to know, based on a configuration (processor, used memory modules, video chip, number of fans, etc), which is the better power supply to fulfill an specific need. Is there any calculation I can do for knowing that?
The popular knowledge just says to use certain power supply wattages deppending of your user profile ( heavy user -> 500w, heavy gamer -> 700w, etc), and I think this is very inaccurate.
By the way, my second question is, yes, a recommendation. I recently bought a Intel i7, a 2TB commom HD, a single 4gb module (planing to upgrade to 4x4gb), a GeForce GT210 512mb, with 2 extra fans and a 500w power supply weren't sufficient (The PC was shutting down seconds after it was powered on, and shutting down again(eternal loop) - I think this is a power supply issue). And I will first know how many watts I need to serve my configuration before trying another one.
