Got 2 rigs ...   

1 machine -  2.4 ghz Intel E6600 dual core proc.. 1 MSI 7970 card.  Slight overclock pulling between 630-700 Mhash (depending on OC and heat)..

2nd machine -  3.0Ghz QX9650 intel proc with 2 GTX 580s.  Each get about 160-174mhash depending on OC