I just built this late 2013 mac pro from two dead ones .... Its now a 12 core 64ram 2tb ssd. I must say i am fairly impressed. Its slightly faster than my 6 core 3.46 2012 in a compact package. A mac mini on steroids with better graphics. better but not brilliant compared with my 2012's rx580. I first tried attaching my 4k screen to the HDMI but that sucked so I found a mini dp to dp cable and that drives it just fine. Its a real pity they dont have thunderbolt 3. And the internal engineering is um, qwerky But overall it kills a mac mini (until apple silicon)