SLI power questions

My set up is this
O/S Vista 32 sp1 all hot fixes
CPU AMD 6000+ 3.0
M/B ASUS Crosshair
Ram Corsair xm2 DDR2 800 4 gigs (4 sticks 1 gig each )
PSU Corsair 620HX
Cards 2 same Foxconn o/c 8800GTX in SLI
Drives 2 Seagate Barracudas in raid 0
Optical 2 dvd writers
Fans 6 case fans running 100%
Display 24" V7
Drivers are all up to date. SLI enabled in ntune.
Bios is up to date on M/B

Ok question is this.:

I have each card hooked up to the PSU with it's own cord. No other items
draw power off of them. I was wondering is this PSU is enough to power them.
I have played COD4 max setting 1920 x 1200 and get 70-91 average in
multiplayer with about 24 players total( these fps are in game not fraps). I
do see drops to 50 when moving around from time to time. I played for about
a hour and I haven't had any restarts or glitches. I was told that my FPS
should stay in the 91. I was told my PSU can run them but not correctly. Can
any one give some feed back if my system could run these cards good. I just
installed the second card last week. Crysis FPS is about 35 with settings
1920 x 1200 2x anti and Gamer settings.