EVGA GeForce GTX 680 not working on Mac Pro 4,1?

[empezar]

Hello!

I recently purchased an EVGA GeForce GTX 680 for my Mac Pro 4,1 (which has been upgraded to a 5,1 firmware).

I've downloaded the latest NVIDIA GeForce drivers for Mac OS X El Capitan 10.11.6.

When I boot the computer, nothing happens, at all (the computer starts though).

When I press the press the power button, the computer shuts down within 100 ms, i.e. immediately.

When I reboot with the old graphics card (a huge pink RADEON card), I can boot into OS X, and confirm that the NVIDIA drivers have been installed (and are used).

What should I do next? Is the card compatible? I saw it on a list of compatible Mac Pro graphics cards.

 

[h9826790]

Hello!

I recently purchased an EVGA GeForce GTX 680 for my Mac Pro 4,1 (which has been upgraded to a 5,1 firmware).

I've downloaded the latest NVIDIA GeForce drivers for Mac OS X El Capitan 10.11.6.

When I boot the computer, nothing happens, at all (the computer starts though).

When I press the press the power button, the computer shuts down within 100 ms, i.e. immediately.

When I reboot with the old graphics card (a huge pink RADEON card), I can boot into OS X, and confirm that the NVIDIA drivers have been installed (and are used).

What should I do next? Is the card compatible? I saw it on a list of compatible Mac Pro graphics cards.

1) Do you have any other computer (a normal PC) to test if the card is actually working.

2) when you say "nothing happens", do you mean "no start up chime"? The computer should not immediate shutdown when you press power button (if the OS is loaded).

3) If it's a used / flashed card. And you simply has no way to confirm the card is actually working. Ask for a full refund from the seller ASAP. Especially if it's a flashed card. There is a high chance that you bought badly flashed card.

 

[raymanster]

Have you hooked up/plugged in the power cables to the GTX 680?