Which version of OSX Support my Config

[MyQuadcore]

Which version of OSX Support my Config and do i have any updates Plz Help me out!!!

I have Phenom X4 9850 2500 MHz with
ASUS M3N H HDMI Mainboard (AM2+ (940))
nForce 720a
Nvidia GeForce 8300 on Board (Disabled)
bus : up tp 5200 MT/s Hyper Transport 3.0 for AM2+ CPU
Lan : Nvidia Gigabit MAC
Ram : 2GB DDR2 800
Hdd : 500 GB HDD
Sound : ALC1200
Nvidia GeForce 8600GT 512mb