I have an early 2009 Mac Pro(4,1). Firmware upgraded to a '10(5,1), 24GB RAM, upgraded processors to two quad core 3.46 GHz Xeons', NVIDIA GeForce GTX 760 2GB. I'm looking at the next upgrade options and an SSD comes to mind. As you probably know, the '09 and '10 have SATA II, not III. What I want to know is the performance gain from a HDD to a SSD running at SATA II, as opposed to III, worth the upgrade? Can SATA II SSDs be found at a lower price than SATA III drives, if they can be found at all?
I know I can either get a SATA III card or a PCI SSD and not have the performance hit, but that adds enough to the cost of the upgrade to not fit in the budget at this time.