so i found out why my 2x hd 7950's were under performing even being overclocked (was only getting down to 9 sols per card!) the nheqminer.exe was only giving me 8 / 9 sols (i5 2500k) and after a short period of time my graphics cards were dropping stupidly low, i turned off the CPU miner and it jumped back to 45+ per card, i'm now getting around 90 sol's total, i thought i'd throw it out there in case anyone was also having issues.
I just thought it seemed a bit strange that a CPU miner that only gave me 8 / 9 sols was hindering so much of my GPU's.
Windows 7 64 bit
catalyst 16.9.2 drivers
Claymores 2.1 beta (GPU)