Good afternoon, I've been trawling this forum for all sorts of guidance, and hoping that some of you guys can help?... I have an old 3,1 2.8 8 core machine here which I have had for many years, inside which I have an OWC Accesior PCI card, with Crucial 500GB SSD mounted to it. This is running El Capitan, and has all my apps installed on it. I also have three conventional hard discs inside this machine, with all my docs, photos, etc... Yesterday, I picked up a 5,1 system, 3.33GHz 12 core, with GTX680 (2GB), and 32GB of ram (4GB modules). It has two hard drives installed, and is running Sierra. Firstly, can I simply pull the OWC card and SSD from the old machine, put it in the new one, and boot up from it, and after that upgrade to Sierra? Should I also move my other hard drives over at the same time? Is it also best to put this SSD and card into PCIe slot 3 or 4? I always assumed these were the fastest, but have this morning read conflicting opinions to that on another thread. Lastly, will changing the 8 x 4GB memory modules for 6 x 8GB ones (48Gb total) give me any more performance? Many thanks in advance for any advice you guys and gals can offer... Mike.