So, here I am exporting out 1800 images on my 8 core MP with ATI 2600HD. However, my system is sitting between 60%-80% idle on the CPU usage. So, my question is what does Aperture use to export? Is it just poorly optimized for multiple cores, or does the bulk of the work fall on my GPU? I'm guessing since Aperture is still using about 250% of my CPU power it must rely more on the CPU and if so... Apple - Get on Aperture 3 with GCD utilized! However, would I notice a slight-decent increase in export speed if I jumped on to a GT120? Anyone know? PS - It is hoarding all my RAM though, at least in terms of 'inactive', I'm down to 50MB free of 10GB and it's dropping.