I've got a 2013 Mac Pro (6 core 32 GB RAM/D700) at home and one a work (6 core 64GB RAM/D500). So, more RAM, but slower video card at work. I've had the home Mac Pro since Feb, and the work one is about 3 weeks old. I've noticed a significant speed advantage with the work computer. Launching Photoshop from a reboot takes about 2 seconds. At home, it takes about 10 seconds. This is an extremely minor gripe, but it's nagging me every time I launch apps. Is this really the difference between a year old SSD and a brand new one? Can read/write performance degrade that much? Or is this some other issue related to RAM...I can't imagine it would be...either machine has enough memory to run Photoshop adequately. It could also be OS cruft...possibly? My home computer was upgraded from my old MacPro which probably has 6-7 OS upgrades of cruft. It's this way with almost every app, not just photoshop, so I'm pretty sure it's the year old SSD. I just didn't think I would see that much of a difference in performance.