My office has (finally) started to refresh some older Mac Pro equipment. I managed to snag a 5,1 cMP with 12 Core with running at 2.66 GHz (should be x5650's). It currently has 26 Gig of Ram 6x4GB Sticks and two 1GB Sticks. The stock graphics card is a ATI Radeon HD 5770. Right now, because I had them on the shelf I have two WD Green drives (1/2 TBs) one WD Red (3TB). (Machine had no drives because they purged it when they turned over the equipment). Also has the wireless upgrade from Apple. Currently my upgrade MacBook Retina is running as the home iTunes server, the DVD ripper, the goto Mac on my desk, my network manager, my Xcode builder, etc. I serve it using a small thunderbolt raid, which backed up to a USB 3.0 Drobo raid weekly. I would like to switch all of those duties to the Mac Pro to regain the portability of my retina when I need power on the go. Here is my plan (based on what I had on the shelf, what was cheap given my budget at hand). I have an Apple 256GB SSD from my MacBook Retina (2012), a Seagate Momentus 750 GB Drive, a Diamond Sapphire R9 280X DDR5 3GB (PC Card). Here's is what I have ordered so far, my plans for them, and an open to suggestion to modify the plan, change the design, or ways to optimize what I am doing. I will also outlay the things I eventually want to do as well, money, budget, time permitting. Have combed though a lot of the more recent threads in the forum, but if you have forum posts that you suggests I read, I will do that to. Initial Plans SSD and Momentus Fusion Drive. OWC is running their garage sale right now. I picked up an Accelsior S PCI-e card and a converter for the MacBook Pro Retina SSD drive. My intent is to populate that Accelsior card, with the SSD and then create a fusion drive with the Seagate Momentus Drive. I haven't seen a lot of posts about fusion drive setups. Should I just skip it, run the drives separately? Not wedded to this idea either way, more of a science experiment. Diamond Sapphire Vapor X I know there are other cards out there, but this is what I had on my shelf. In reading the forums, it seems like this chipset is fairly well supported (7950?) though only a few forum posts about this particular card. I have ordered the extra 6 pin cable and the two 6 to 8 pin connectors necessary to power it. (Apparently this card pin senses to check all 8 pins are connected). Any known worries about this card? Support in Sierra? Future Plans I would like to do a CPU upgrade. I have done a review of the CPU thread, but I didn't see anyone doing benchmarks between the various levels, which makes price / performance comparison difficult. I was looking at the X5675 since they seem to run near $100 a pair rather than the X5690s at $500 or so a pair, or am a missing a source of cheap processors. I would also eventually like the OSXWifi upgrade to get continuity, handoff, etc. but that is a lower priority than performance. The last upgrade I was thinking would be USB 3.0 / 3.1 card. I have looked at the caldigit card, but at $169 it is steep. I have seen some other usb 3.0/3.1 cards without the esata, but haven't seen if anyone has tried them yet. I would like a USB-C connector for future proofing, but understand that the performance looks a little dicey on those cards right now, so was also looking for recommendations on the best price/performance USB 3.0 card. These are plans, know this is a long thread, looking to learn as well as contribute back after I try these things.