I also highly recommend Kalroth's version of cgminer! The xIntensity feature allowed me use 2 threads with my 7950, getting it to hash on par with my 7970!
http://k-dev.net/cgminer/You're getting over 700KH/s from a 7950?

If this can be confirmed that'll be a mini-game changer for mining.
I'm getting 700 now from my sapphire 4L 7950s.

Is that hashrate confirmed via middlecoin or outside pool?
cgminer and we mine ltc, middlecoin gives me a bit higher reject rate, so the accepted MH is lower.
TC 24000, lantis bin, 1125/1650, 1.05v, I20