videocard power supply?

[zalazin]

I have two systems I am using:
system 1
ASUS P5PE-VM 865G based mobo
D 820
2gig 2sticks DDR 400 dual channel
7800 GS AGP card
WD 250 SATA , WD 250PATA HD
Samsung dvd burner
Antec true 480 18 A on 12 V rails
Win XPpro Sp2

System 2
Giagabyte GA -945GZM-S2 (rev 3.0) mobo
e4300 at 2.4
1gig 2sticks DDR2 533 dual channel
XFX 8600GTS 256 meg with PCI 6 pin connector
WD 320 SATA, Nec DVD burner
Antec Earthwatts 430 17 A on 12V rail
Winxp pro Sp2

Which psu would be best for each system ( I am thinking if I should switch them)?
I don't know how much power a 8600 gts uses.