Apple Mac Pro 5,1 -12 Core 128gb -RX580 GPU 8gb - MacOS Mojave 1tb SSD + 8tb HD
GPU : Radeon RX580 8gb - Bought new 3 years ago, it has Mac EFI bios (not re flashed) and supports the boot screen and 4k resolution on HDMI and DP 60hz (check monitor DP version spec). Ram : 128gb DDR3 ECC at 1333 Mhz Samsung.