gt 740 sc

It seems that for some reason when the apple logo is loading, the screen goes black and I have to turn the screen off and on for it to work. This happens on both my Sierra and Yosemite boot up. Screenshots from the BIOS:

I purchased this card because it is on the Buyer's Guide (latest version), but no matter what I do, I can't get it to work, but in the same computer, it works under Windows 10 perfectly. Can anyone help? Simply performing a clean install (starting from scratch) I just get a black screen after...

Gigabyte Z97X-UD5H Intel I7-4790k GT 740 SC 2GB GDDR5 (link) After hassle-free installation of OSX 10.10.3 on my new build using the integrated graphics, I'm currently running into issues trying to get my GT 740 to work. The fan runs full speed as soon as I turn on, but my screen stays black...