In any computer, there is a bottleneck. The processor, the amount of memory, the bus to the hard drive, etc.
I just ordered a 2010 MacPro, 12 core, and although the 12*3.33 GHz cores should give me more than 3x the performance of my quad 2.8 GHz, I understand it probably won't. I am wondering what the weak link will be and how to improve it. The first thing I'm considering is a PCI card with 2 SSD RAID 0 to run the OS. On my old Pro, I saw amazing boot times from a shift to SSD. The Mac will have 32GB of RAM, I'm assuming that's enough.
Update - One example of an intensive process is video encoding. How do I find whether writing to the hard drives is the slowdown, i.e. that raid 0 for the hard drives would help the speed?
Any other advice? How do I identify the bottlenecks once this machine is running?