I recently bought a Toshiba Satellite L750D laptop, and I'm just having a few issues with configuring it to get the best performance for Photoshop. It's got an AMD A6 Quad-Core CPU and 16GB of RAM, but it never seems to use more than about 3.5GB of that RAM. It also has "crossfire" technology which means it is capable of switching between the on-board graphics processor and the dedicated graphics card.

The specs say it should be reasonably quick and the Windows performance indicator says it is, but it is noticeably slower when running batches in Photoshop than my desktop is.

Anybody else got this problem with AMD stuff? Someone else I know has a similar problem and says AMD chips and Photoshop can be a problem with not using all cores. Anybody else heard of it?

TIA
Tim