Gigabyte WF3 7950 w/ F43 bios & modified .bin files from litecointalk forums(
https://forum.litecoin.net/index.php/topic,6058.0.html):
--thread-concurrency 24000 --lookup-gap 2 --gpu-engine 1130 --gpu-memclock 1250 --gpu-powertune 20 -w 256 -I 17 -g 1 <--- 640kh @ 77degrees with no additional cooling
--thread-concurrency 24000 --lookup-gap 2 --gpu-engine 1130 --gpu-memclock 1250 --gpu-powertune 20 -w 256 -I 20 -g 1 <--- 701kh @ ~83degrees with no additional cooling
With better cooling and tweaking the clocks, I could push more.
With my MSI 7950's this is what I use:
tc: 40960
engine: 1100
memory: 1500
powertune: 20
intensity: 20
That'll net 680-690kh around 75-80* on the Twin Frozr, or 55-60 with the Prolimatech MK26 cooler (I <3 this cooler! silent and super cool)
I have some more aggressive settings for the MSI which will push it to 710/720.