So I'm getting into turning my cMP into more of an 'up-to-scratch' machine that will do what I want when it comes to intensive video editing, colouring, audio production, motion graphics etc. I've been reading as much as I can about upgrading and the best ways to do so. I'm planning to upgrade the Graphics Card (as an aside: anyone got an opinion either way on CUDA vs OpenCL?) So I have the Single Quad-core version of the Mac Pro and I'm wondering a couple of things - it's been a while since I've spent time upgrading computers at this level (probably since I switched to Mac in '08), and it has only ever been PCs. So: In their support documentation for upgrading the Mac Pro's RAM, it states that the maximum memory is 16GB (and 32GB for the 8-Core). Is this simply old documentation? OWC looks like it will allow me to buy 3x 16GB RAM modules, for a total of 48GB, and doesn't seem to suggest this would be an issue. Secondly, I'm looking into upgrading the HDDs. I'm thinking of having a PCIe SSD as the boot disk, then use 2x internal bays with 3G SSDs striped as a RAID 0 for my 'scratch disk' and a third spinning drive as a 'documents' drive for everything else. Is the PCIe boot disk worth the outlay? Can you even stripe the internal HDD bays in this way without another RAID controller? I've read about 'upgrading' the internal bays to SATA III with a PCIe RAID miniSAS controller, but that could be starting to get a bit too involved (although I'm sure for some, that's not all that involved ). I've got a USB 3 PCIe card arriving shortly - should I just use a USB3 drive... Sincerest thanks for any help/advice.