This is my first post, but I have been using this forum for a while.  I currently have an Alienware M18 R2 with two 7970m's. These cards are rated at 100W a piece and I am currently pulling right around 300Sol/s with 12.4 but I had to make a configuration change.  When I moved from 12.2 to 12.4 the default intensity was changed from 3 to 4, as my cards only have 2GB of memory on them this intensity was too high and I dropped to about 200Sol/s. For ALL revision before this that I have used, the intensity was set to 3 by default.  So look to see if your intensity has changed if you are getting lower Sol/s then you were with earlier revisions.  Also, going from 12.2 to 12.4 with intensity set at 3 I went from about a peak of 285 Sol/s to, as stated above, about 300 Sol/s.

Thank you Claymore for all your work and I gladly donate that dev Fee.

HSL