I have a Mac Pro 2012, and recently installed a new Gigabyte GTX 760 graphics/video card. I also have Windows 7 installed on this computer on my Bootcamp partition.
When I attempt to start up my computer and enter the "boot manager" by holding down the Option key, I get nothing. The computer chimes, but I see only a black screen, and have to hold the power button to shut off.
The normal OSX system boots fine if I don't touch anything, and I can only boot Windows if I select that partition while in OSX and restart.
I found that if I swapped back to the original video card, an ATI Radeon HD 5770, it boots to "boot manager" without a problem, and lets me select which partition on my drive to boot to.
After some research, I am gathering that this has to do with the EFI/BIOS process, but I don't really understand where that lies, nor what is going wrong.
If I'm understanding this right, here are some questions, but let me ask the most basic and important one first:
- Why does it boot to a black screen with the NVIDIA GTX card?
and kind of a tangent, and might even be answered in your answers, but:
- Is there EFI/BIOS on the graphics card itself?