Ok... In my office we have to do loads of renders. The Mac Pro was taking too long to come out so we got 5 Mac Minis full optimized to do the render in network. What we ended up doing was multiplying out problems x 5! We do not get a Mac Pro but the iMacs do the job way faster. One iMac renders 26 episodes over night, one Mac Mini about 10. Then, when I set up the job between the 5 Mac Minis, the first one runs fine, the second one get very slow and forget about making the third one to run. While #10 is doing 10 renders, #2 is doing 2. It may be system bus, there are bunch of variables. But I wish we had a Mac Pro instead of the Mac Minis.