On a happy note, new cgminer for HVC is a nice speed improvement, at the cost of extra power usage.
My rigs before
290x @1150Mhz -I8
25mh290 @1150Mhz -I8
22mh280x @1170Mhz -I8
16mh270 @1150Mhz -I8
10mh270 @ 1190Mhz -I8
11mhMy rigs now:
290x @1150Mhz -I8
31mh290 @1150Mhz -I8
28mh280x @1170Mhz -I8
22mh270 @1150Mhz -I8
14mh270 @ 1190Mhz -I8
15mhEDIT: Just don't do what I did, and overwrite the batch file with my wallet address with the default one and mine for over an hour for somebody else at 300mh.

Can't believe in it!
The new version of cgminer by 1gh increases my rig's hash power greatly!
I can say 1gh is the best pool with the strongest tech support I've even met.
Do I need change the cgminer setup or just use the default one? I have hd 7950.