Hmm, glad that it worked for you guys. I tried that both with lasys and the "14.6fixed" miners, didn't see an increase on my 7950s though.
I think that it might be a problem with win8.1 and the 14.4 drivers because I noticed that I actually lost about . 1Mh per card after "upgrading" from win8 to 8.1 and running 14.4 modded driver (I have six cards) and lazys miner like I had been.
I'm running Windows 7 with the 14.4 v3 mod drivers, lasybear's miner (sgminer_x11x13mod_03_06_2014.zip), and Pencha's BIN file.
I have 6 GPUs per machine and get 3.7 m/hash per card @ 1080/1500.
How much are you getting currently?
I'm seeing about 2.89 Mh/s per 7950 card (sapphire hd7950 non-reference) running win8.1, 14.4 modded driver, and lasy x11 miner. (Was seeing ~2.99 with win8 before I "upgraded".) I put the .bin file in my miner folder and didn't really change anything though, so I tried a different miner with the new .bin and still saw about 2.89per card. I wonder if the lasy x11/x13 build is better than the x11 one. I might have to run it to see, but I'm thinking that either one handles x11 the same.