AMD Radeon R9-270X OC 2Gb PCI-Express Graphics Video Card

*Modified Graphics Video Card For Mac w/Apple Boot Screen    Condition : Slightly Used w with 60 days warranty Compatible Mac Pro Model :  MacPro1,1 - 5,1 from 2006 to 2012  *MacPro1,1/2,1 with OS X Mavericks 10.9 or higher OS X installed Compatible OS X :  Lion 10.7.5 or Higher macOS High Sierra 10.13.x Compatible , * METAL Supported !! Bootcamp Supported ( windows 10 / 8.x / 7 / Vista / XP 32/64-bit )  Connector Port : 1x Dual-Link DVI Port , 1x Display Port , HDMI Port & Upper DVI Port@ windows only  ( 2 Display Simultaneously )  *Display Port - 4K Support @30Hz (OS X 10.9.2 or later , may not show Apple Boot Screen, Proper adapter may need)   **Build By AMD/MSI (Factory OverClocked model) with HAWK TwinForza Cooling Fan System, Silent & Cool  *True EFI Firmware modified, Fully compatible & Apple Boot Screen available