7600 GT? It's perfectly compatible as well.

Have a look at my specs, Leopard is running perfectly for me since Zeph's Rev.1 RC2 :-)

Motherboard -> DFI LanParty UT nF4 Ultra-D
CPU -> AMD Athlon 64 X2 4200+
RAM -> 1 GB Kingston HyperX DDR
Graphic -> Colorful GeForce 7600 GT
HDD -> Maxtor DiamondMax 10, 300 GB & Maxtor IDE 40 GB
Drives -> LG GDR-H30N-BB, Plextor PX-810UF
Control -> Apple Keyboard, Apple Mighty Mouse
Network -> Wi-Fi Served by Airport Extreme