Originally Posted by
Lemmiwink
That's from Newegg, heck I wasn't even able to put in all the stuff I had and it wants me to have 543. They don't calculate you might use all of your USB slots, Firewire, Thunderbolt. Or have 8 extra chassis fans installed or maybe a electrically motored front panel. I was having trouble with my 850W Chieftec Ntro not delivering enough power to me on a regular basis so I went and got myself a Corsair AX and now everything is smooth again.
Don't listen to these people when it comes to 2 things; PSU's and amount of RAM. You will only sit there with a PC that can only be used for gaming and light use tasks that have no upgrade potential due to skimped out PSUs. Calculate what you need in Watt, add 30% and you should be good to go.
Remember, if you start overclocking you will increase the temperature of your system, when you increase temperature the PSU will normally run alot hotter than what Wattage the manufacturer tested it in when they decided it was a 450W, it might be effectively only a 410W due to temperatures. Also 430W is divided between all the rails (+12+5+3,3-12-5) meaning most of this will be on the +12 if it's a good quality PSU. Many of these lesser manufacturers amps up the wattage on the other rails to get a nicer number, ignoring the +12 and leaving you in a bad situation should you decide to go with alot of the tips you get on this forum. Like I said, find out your need (400) add 30% (400*1,30=520) and place your order.