Hi im new to bit mining and i am running dual MSI 6990s and they run at 333.33 mhash/sec per GPU which gives me the total of 1332 MHASH/SEC. Is this normal?? I want to try an overclock it as well, can anyone give me tips on how to do that and what rate should i be going at per card or per GPU??

oh btw im also running my SAPPHIRE 5770 1GB on another computer and it only gives me 125.66 mhash/sec. On the wiki it saids i should be going at 156.83 at core of 850. what am i doing wrong?
C:\Users\Username\Desktop\phoenix\phoenix.exe -u username:password@deepbit.net:8332/ -k poclbm DEVICE=0 VECTORS BFI_INT AGGRESSION=8 WORKSIZE=128