Check out how much power you need

The lite version looks suspiciously like the antec power supply calculator i use:

http://www.antec.outervision.com/

As in, exactly the same.

According to that I can run my system on a 322w power supply.

That is because the one on the Antec site is the same as the extreme.outvision one, Antec (I'm assuming) bought it off them. Anyway, it's something we've seen a thousand times, it's nothing new or all that accurate. It isn't even the best one, this is: http://web.aanet.com.au/SnooP/psucalc.php

According to that, my cpu uses 224w...by itself...

LOL. I made an i7 build with one 285 gtx and it told me i needed a 1400 watt psu

says my system uses 390w under 95% load....dunno how accurate that is.