SATA3 ports on Mac Pro early 2008 PCI-e cards
My Mac Pro early 2008 (2x2,8 Quad-Core Intel Xeon; 6 GB RAM; ATI Radeon HD 2600 XT, with 10.8.5 and 10.9.2) was slow in some Finder actions, in Photoshop too and in particular after Mavericks update, so I decided to install two ssd + 1 3,5" HD in the optical bay and searcing around Google and in various threads I found some PCI-e x2 cards not expensive, all have already been mentioned here.
Running around Google I learned that the first easy option is to use the two SATA II ports on the board of the Mac Pro, but I have seen also PCI cards that can increase the speed with the SATA 3 ports at a reasonable price.
I bought a pci-e card based on a Marvell chipset with 4 Internal SATA ports, it's giving me very good results, so now I'm very happy, the Mac seem a new one! 🙂