One of my mining computers with an R9 270x lost it's hard drive so I got PIMP going, 1.7.0 with the 14.9 drivers.
Currently doing 2342 Kh/s with Pimp's built in sph-sgminer_x11mod that is in with W0lf's binaries.
A different Windows rig, same vid card, is doing 4.2 average. The same...