Which grapics cards will work on my pc

[Ram_50]

how to check my pc to support for grapics cards
wat r all the grapics cards will support for my pc??????
my pc speci:
3 gb ram
my monitor resolution is 1920*1080
my motherboard is asua m2n- mx-se
amd dual core processor 5600+ 2.8Ghz
my SMPS model is ATX P4
CAN U SAY ME WHICH GRAPICS WILL SUPPORT FOR MY PC........??
whic will be best and it should runs all the games like assisan creed brotherwood,call of duty4,GTA4


MY POWER SUPPLY IS
Ac input 230vAc 10A 50-60HZ model: ATX P4
dc output
+3.3v +5v +12v -5v -12 -5VSB
15A 16A 15A 0.5A 0.5A 2A

350/400/450W

 

[GreenDutchAlien]

What brand/model is the psu ?

 

[Ram_50]

NEV Tech smps..........ATX-P4
my motherboard is asus m2n- mx-se
processor is amd dual core 5600+
3 gb.pls help