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

*Modified Graphics Video Card For Mac w/Apple Boot Screen     Condition : Slightly Used with 60 days warranty Compatible Mac Pro Model :  MacPro1,1 - 5,1 from 2006 to 2012 EFI32/64 *MacPro1,1/2,1 with OS X Mavericks 10.9.3 or higher OS X installed  Compatible OS X :  Mavericks 10.9.3 to macOS High Sierra 10.13.6 *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( 2 Display Simultaneously, HDMI@windows only, Upper DVI port inactive under Apple OS )   *Display Port - 4K Support @30Hz (may not show Apple Boot Screen, Proper adapter may need) * Build By AMD/Sapphire with Dual-X Cooling Fan system, Silent & Cool    *True EFI Firmware modified, Fully compatible & Apple Boot Screen available