
I was just running a openCL OceanWave FPS test suite. See the results:
OS X 10.8.4 Intel(R) Xeon(R) CPU X5482 @ 3.20GHz 3200 MHz
GPU ATI Radeon HD 7950 Compute Engine 800 MHz 499.0 fps
AA ON
Bandwidthes: device>host: 6349.9MB/s host>device: 4683.9MB/s device >device: 110690.0MB/s
Pretty good results ( 499.0 fps), they do not look like driver issue! Probably a CO1 7.13 issue...
My Web Support Case Number 128082 is no help, till now.