Thanks for your response. To clarify, my PC is a custom server motherboard with two quad core Opterons, 8 G ram, Win7x64 on one drive, and separate “media” striped dual RAID drives. Somewhat bleeding edge when built 4 years ago, but still no slouch in 2012.
When rendering standard def video (old video tapes to MPEG-2 for DVD Arch) in VP09 xs64, all 8 cores load up equally at an average 75%, and a 1:20 minute video renders in 40 seconds. Repeating the same render effort with VP11 x64 (no GPU acceleration) loads all 8 cores to an average 25-30%, with 4x render times. Same settings, same OS, same motherboard, same CPUs, same GPU. Now admittedly there may be some random setting difference between version 9 and version 11, but a four fold increase in render times?
Regarding OpenCL, poking around on the ATI web site revealed a web page that seemed to indicate that the first generation FirePro cards (like mine) are not yet fully OpenCL 1.1 compliant, but are only OpenCL 1.0 compliant (https://developer.amd.com/sdks/AMDAPPSDK/pages/DriverCompatibility.aspx); the 7750 is clearly listed as “beta”. Now the page may be out of date, and the difference between versions 1.0 and 1.1 may not be significant, but I am noting that it may not be Sony’s fault that the card does not show up under GPU acceleration, but rather ATI has not updated its drivers for its older video cards yet.