hi , i recently bought my new pc without considering that i wont be able to overclock because of the integrated graphics, but now i want to overclock my cpu

the bios gives me no option to do so ,
can anyone help me with this !

also , i've read at many places that x3000 is giving them good performance when they run games
my pc can barely handle command and conquer generals at medium detail and low resolution , please help , will installing vitsa help?

E6600
INTEL DG965RY
1gb single channel ddr2 667
160gb SATA
onboard x3000 (waiting for dx10 cards - the cheap ones)