Hmmm I have a GeForce 7300 GT 512 and it runs fine on my Antec PSU.
As a side note I did alot of research on PSU's and found that it's better to buy a quality (Stable) but lower watts 4 the $ PSU than a crappy higher watt PSU that isnt stable. Its estimated that 85% of all power supply's on the market are non stable garbage. I recomend Antec earth watts PSU's as they are efficient, Stable and affordable.
My specs
AMD sempron 2800+ MMX 3DNow, ~1.6 Ghz
Gigabyte GA-K8vm800m rev. 0
756 megs of ddr ram
Direct X 9c
EVGA GeForce 7300GT 512 DDR2
Antec earth watts PSU 350w
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