I thought I would share some stats for those who are running 7950's. With 3x7950 @1.1v 1100/1500:

Version 1.2 ~890 h/s
Version 2.2 ~1013 h/s
Version 3.1 ~1227 h/s

For all versions I am drawing 530w from the wall and the gpu's temps are about 68C. GPU_MAX set to 80 (85 was about the same). For me, XMR mining is 10-15 degrees cooler and draws about a third less power than scrypt or scrypt-n. No longer heating my basement!