Ok, so I'm not a total noob- but still relatively.

I initially setup a 7850 rig and am getting ~350mh/s out of it and am happy with that (unless I shouldn't be).  His weekend I setup a 1x 7950 rig (these are two separate pc's) and am only getting ~485 mh/s where I think I should be getting 550-600.

I'm using guiminer with flags set -v -w256

Any tips on what else I can do?

PS- I was using 50btc, but got tired of their site being down half of the time I went there.  Using btcguild now.

Thanks for the help!