Don't know if this will helpkb.adobe.com/selfservice/viewContent.do?externalId=kb404898
Here's the intro:
Photoshop CS4 leverages the graphics display card's GPU, instead of the computer's main processor (the CPU) to speed its screen redraw. For Photoshop to access the GPU, your display card must contain a GPU that supports OpenGL and has enough RAM to support Photoshop functions--at least 128 MB of RAM--and a display driver that supports OpenGL 2.0 and Shader Model 3.0.
words...lol
(Here's the intro:
Photoshop CS4 leverages the graphics display card's GPU, instead of the computer's main processor (the CPU) to speed its screen redraw. For Photoshop to access the GPU, your display card must contain a GPU that supports OpenGL and has enough RAM to support Photoshop functions--at least 128 MB of RAM--and a display driver that supports OpenGL 2.0 and Shader Model 3.0.
words...lol
Joe Scaramanga with a G-double-O-D vibration,
Wed 19 Nov 2008, 8:44,
archived)