Hi guys, noob to the forum posting my first post to enable PM's..

Ive got 3 rigs running 3 x MSI 7990's each.  All running cgminer v3.3.1 / cgwatcher mining ALT's.

The sweetspot for power / heat / not overdriving the cards Ive found to be:

0.800v
850 gpu
1450 memclock
I=19
Threads = 16384
Temps: 70-85 degrees.  (One core always runs hotter for some reason)

Pulling 620 average per core - so 1240 per card.

MSI mobo.  Windows 7.  4GB physical RAM, 8GB page file.

Power draw is around 1700 at the wall.

Im an IT guy and tried all different combinations of drivers, sdk's, tweaks, overclocks and underclocks. 

I dont know everything, but this config is solid for me.