just bought a better (i think...) psu w/following specs:
new one: (w/lighted fans w/speed controller) 450W
+5v.........30a
-5v..........0.3a
+12v.......34a
-12v........0.8a
+3.3v......28a
+5Vsb.....2.0a
old one: (real basic, 3 speed fan) 500W
+5v.......30A
-5v........0.5A
+12v.....18A
-12v.......0.8A
+3.3v.....14A
+5Vsb.....2A
Did I get an improvement?