Ah, I see we’re back to the days of real workstations. Think Sun and SGI. Easy to repair, but totally proprietary and while expensive, you can’t build a machine anywhere close to the same price/performance ratio.
Yes, the CPU is upgradable, but I wouldn’t. Apple designed the thermals and power supply (it’s only 450W…) of the Mac Pro to fit a certain range of chips. If you drop a high-TDP Xeon in there you are asking for trouble.
Upgrading the GPUs is another issue. One of them has the SSD socket on it, and the both have Apple’s own compression connectors (a page right out of SGI’s playbook). Unless Apple makes newer cards available you are stuck with what you have.
Best advice? Buy a new Pro, sell the old one. I get the feeling these machines will hold their resale value like most Apple gear.
