82Db on 100% fan, ahahah and some people said its tolerable. IF YOU ARE DEAF
nice 20% oveclock though so it seems 400 series overclock pretty similar to 5000 ati series.
Look at the wattage -
5870 - 182/325
480 - 274/448
480OC - 278/519
100W more on IDLE :O - and more .... 123W more on load. (NOT OCED)
Now how can someone explain me the 123W more on load and still nVidia claiming 250W
5870 stated as 188W + 123 = 301W :O
Lets assume cards are not using full potential in this test, this means nVidia cards can go over 300 on some special occasions
another thing to mention - 448 W on load, and they said its pretty slim config , no DVD, 1 drive, no external usb gadgets , probably no case fans,
I am not sure you are going to be ok with a 600W power supply
You will be pushing it too much while you game, not to mention if you want to OC
Safe bet for 1 480 probably must be at least 700-750 and for sli - 1000W :O