utahjohn - so continuing the conversation from the Wafflepool thread...
I backed up all my configs and updated to the PiMP 1.5.5-amd-14.4 distro image which has Catalyst 14.4.
Copied over your optimized cl files and the bin files (your X13 bin and someone else's optimized bin for X11).
Results are almost exactly the same as I had under the 13.12 drivers on 14.4:

Any higher on "some" of the GPU's core/mem speeds get me HW errors or SICK GPUs.
Playing with other values such as variations on intensity, shaders, GPU threads, etc, get me lower values than these.
Any ideas?