Apple Mac Pro, 3.7GHz Intel Xeon E5 Quad Core, 12GB RAM, D300 Graphics, 256GB SSD, Black, ME253LL/A  (Discontinued by Manufacturer) 3.7 GHz Quad-Core Intel Xeon E5 Processor 12 GB 1866 MHz DDR3 ECC Memory 256GB PCIe-based Flash Storage Dual AMD FirePro D300 with 2GB GDDR5 VRAM each Mac OS X Yosemite