I have PS CS5 (both 32- and 64-bit) loaded on both my laptop and my desktop. Both systems use an nVidia graphics card. My notebook, a Sony 16+ inch, uses an nVidia GT300M chipset. I have no problems with video/hardware acceleration on both version of Photoshop.
My desktop is another story. I never had graphics acceleration when running PS CS5 in 32-bit, only 64-bit. I decided to upgrade my graphics card to one of the latest, the nVidia GTX 560Ti. I have the latest driver, etc. I STILL have no GPU acceleration in Photoshop if I launch 32-bit. The option is grayed out. (I've attached a screen shot.)
I'm running Windows 7 64-bit on both machines. Can anyone figure out why I'd have the option with either version of Photoshop on my notebook, but not on my more powerful desktop? Thanks for the help.
Nemo