I find it really snappy when I first open Blender, but as I work it gets slower and slower to the point it being unusable. I then must restart Blender. I don't believe all the machines I've tried it on have ATI cards but I'll check.

My home desktop has ATI Radeon and lappy has an ATI Xpress 200M. The machines here at school are quad core iMacs but I don't know the graphics cards. Most likely ATI aswell as Mac has largely used ATI in the past.

<strong>bandolin</strong><br />
[Former 3DS Max forum coordinator]<br />
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