how much memory does it have?
32 GB (1 GB = 1024 B) of memory (8 × 4 GB)
Mac Pro
 The cards have 4 DIMM slots each, allowing a total of 32 GB (1 GB = 1024 B) of memory (8 × 4 GB) to be installed. 
what is the motherboard in a mac pro UNANSWERABLE is it a laptop or a desktop? It is a series of workstations and servers for professionals. It is one of four desktop computers in the current Macintosh lineup. which os runs on it? Mac OS X describe its design? The lattice design was purportedly originally developed by Jony Ive for the Power Mac G4 Cube in 2000. It comes bundled with a new Magic Keyboard with black keys in a silver chassis, and a black Magic Mouse 2 or Magic Trackpad 2 with a silver underside.
wiki:16108687
Mac Pro [SEP] Memory
With a simple installation of a single FB-DIMM, the peak bandwidth is 8000 MB/s (1 MB = 1000 B), but this can increase to 16000 MB/s by installing two FB-DIMMs, one on each of the two buses, which is the default configuration from Apple. While electrically the FB-DIMMs are standard, for pre-2009 Mac Pro models Apple specifies larger-than-normal heatsinks on the memory modules. Problems have been reported by users who have used third party RAM with normal size FB-DIMM heatsinks. (see notes below). 2009 and later Mac Pro computers do not require memory modules with heatsinks.