yes u can u can OC but u must have big size Memory for memory sharing (max 512 MB & keep NB temperature !
In bios select
- UMA+Sideport set in 512MB ,
- other side control Clock set 700~990 not over, i have Mobo onboard under OC 42% max get 990 succes on 3Dmark06
- HT link 2500 above & max 2800 better get more score in 3Dmark06 (i have HD 4290 )
- Test your VGA with 3Dmark06 & how much u get Score ! hmm... maybe max u can get 2844