run an added 8600 gt? i wanna swap the 7300 for a 8600gt. dont know if a 400 w could do it.
I have a 400W running A 8600GT just fine
Abit IP35-E Motherboard, 3Gig- corsair RAM
PNY 9800GTX+ 256MB DDR3 Video Card,
Core 2 Duo E4300 overclocked 2.2Ghz
SATA Western Digital 160Gig HD,
Windows 7, Dual 19" 1440x900 Monitors
Most all mid tower cases built these days are ATX.
I can't tell you why the 3.3V is at 22A. I'm not sure why they are built that way. But you are correct in that A stands for amps. That PSU should be ok. Depending on the card manufacturer, some only call for 300W and 20A.