I have been going back and forth for a few years... looking around Apple refurbished or eBay 5,1. It’ was very expensive in the range of $3000 for 12-core 16GB memory Now when the 2010 model is vintage, got a deal $900 for this configuration: mac pro 4,1 flashed to 5,1 2x 3.33 6-core 32GB ram Raid card and 256GB SSD ATI 5870 I am a data analyst and need to try out different cpu-gpu programming approaches. I am also interested in 6,1 but it is a closed system, whereas 5,1 sounds a good match because I could install Nvidia and AMD cards to test Cuda and OpenCL. However, this machine is almost 10 years and no more hardware repair at Apple. The software support will probably end in one years; I could hang on for another two years like el cap on my mba Apart from $900, I plan to upgrade to 128GB memory and buy a few gpus. So this add up to over $2000. If I miss this again, I might just bother the linux as a development server and keep using my mba as the front end and office work. However, I like to concentrate on the maths, coding and gpu programming, and less on linux admin etc. Time is running against me. Also, I don’t have the money to pay 8k plus for mMP. With imperfect knowledge about that machine, limited support and two grams investment, what should I do?