The Nvidia GeForce GTX 770 is a strong, reliable, and efficient option for Mac Pro towers, supporting up to 4 simultaneous displays with support for 4K output!

The GTX 770 brings together strong power with good efficiency, featuring support for 4 simultaneous displays, 2GB of Video Memory on a 256-bit memory bus, 1536 Cores, and full support for DirectX 11, OpenCL, and CUDA. These GTX 770's have been FLASHED for the Mac Pro towers, meaning that they were originally PC graphics cards, but have since been modified to work identically to the standard Mac edition, complete with the Boot Screen at startup for system selection and recovery access, and full PCIE 2.0 support and speeds.

The GTX 770 is virtually identical to its predecessor the GTX 680 in almost all regards, filling the same purpose, with the same features and specifications. However, it has a slightly higher clock speed for a small performance boost, but should not be considered an upgrade from the GTX 680. Being a newer series, GTX 770 cards are often in a younger condition than the GTX 680.
The GTX 770 has similar specs to the professional Quadro K5000, but offers higher performance in non-professional 3D tasks such as games as well as higher performance in various CUDA and OpenCL tasks.

GTX 770 is more powerful than;
Nvidia GT 120, 8800
Nvidia GTX 580 (Except for some OpenCL/CUDA tasks), 285
Nvidia Quadro FX 5600, 4800, K5000 (Except for Pro 3D apps), 4000
ATi/AMD Radeon HD 2600, 3870, 4870, 5770, 7950 (except for OpenCL), 5870

Is in working condition and has been thoroughly tested in Mac OS X and Windows. There are some scratches and dust on the cooler, but these will not effect performance or reliability.
Additionally, dust has been cleaned from the heatsinks and thermal paste has been replaced to ensure longevity and reliability!

Features 4 display outputs, allowing for 4 simultaneous displays:
-1x Dual-Link DVI-D port (top port) supports up to 2560x1600, adapts to HDMI only (VGA unsupported on this port)
-1x Dual-Link DVI-I port (bottom port) supports up to 2560x1600, adapts to HDMI and VGA for compatibility.
-1x HDMI port, supports up to 2560x1600, adapts to DVI for compatibility.
-1x Displayport, supports up to 3840x2160 (4K) @ 60Hz, adapts to Mini Displayport, DVI, HDMI, and VGA for compatibility. LED Cinema displays supported!


Requires a Mac Pro of version 3,1 (2008) or NEWER, running Mac OS X 10.8.3 or NEWER. No driver installation required.
Not compatible with a Mac Pro 1,1 or 2,1. Please check the images below to verify compatibility before purchasing.
OS X Sierra compatible!

You will receive:
1. The card (will have different branding and appearance than the one pictured, but functions all the same).
2. 2x Mac Pro PCIE 6-Pin power cables, with a 6 to 8 pin adapter included and attached.
3. Any DVI to HDMI or VGA adapters you request at the time of purchase.
4. Displayport to Mini Displayport adapter if you request it at the time of purchase.

Please feel free to contact me any questions you may have!
Comes with a 3 month warranty starting on the day that it is delivered!