...but the above guy is pushing that 520HX to the limit. Constantly. And that's not good for it at all.
I have a quad OCed, 2 GTXs, 2 RAM modules, 1 HDD, 2 opticals. I pull 600+ watts at the wall under load. Even dropping 100 watts (which is very generous) for the dual vs quad, and ignoring that he has another HDD, I would never, ever recommend a 520HX for the above listed setup. Ever. If that guy switches to a quad, it's all over. A 620HX isn't really enough for me to be comfortable. That's 750TX territory, pure and simple.
The OP, however, should be fine with the 620HX.
well am I ok then? or am i really close to pushing it, I don't think I'll be doing any OCing.