For sale here is a superb Gigabyte Radeon R9 280X 3GB graphics card, flashed with Mac EFI to work with Apple boot screens in the original Mac Pro tower.

This card is suitable for both EFI32 and EFI64, and therefore will work in the Mac Pro 1,1 through to 5,1 (2006 - 2012)

It will work with macOS 10.9 Mavericks through to macOS 10.15 Catalina, as it is Metal supported.  It will also boot Windows 7 and 10.

It will display Mac EFI  boot drive selection using the Alt key, and the Apple logo with boot progress bar on screen.

This Gigabyte Radeon R9 280X 3GB Graphics card has 1000MHz core clock, 1100MHz boost clock, with 1500MHz memory, and 2048 Shading units.

Ports available are: 1 x Dual-link DVI; 1 x Single-Link DVI; 1 x HDMI; 2 x mini-Displayports.

Full specs are available here:

https://www.techpowerup.com/gpu-specs/gigabyte-r9-280x-windforce-3x-oc.b2519

All ports should output on macOS and Windows.

These are fantastic cards for gaming, editing or high-end 3D design work, with superb cooling via three very quiet fans.

Be aware, this card requires additional PCIe power via 1 x 6-pin + 1 x 8-pin cables from mini-6-pin Mac Pro logic board connectors to card.

The card itself is in superb cosmetic condition, very clean throughout, thoroughly tested and is working perfectly.

This card has been successfully tested simultaneously driving 4 displays one of which was 4k @ 60Hz.

Please carefully check suitability with your system.  I am happy to answer any questions, but please do ask BEFORE purchase.

Strictly with prior agreement, I may be willing to ship outside of the UK via eBay's Global Shipping Programme to certain destinations. Prospective buyers must check and accept actual shipping costs via eBay before you purchase and accept responsibility for all import duties and taxes to their chosen destination.

Payment via PayPal or eBay payment options only please. Thank you.