Advice on new 24 inch dell/my system

[AceCard]

Hi all,

just need to know if my system is good enough to run 1900x1200 resolution on most games with aa turned off all the time(becuase at that res i can do without it).

would a dual core upgrade be adviseable?? if so which one??

check my sig for my system(7900gtx is oc'd to extreme speeds)

thanks guys.