MacPro mid 2012 vs 4K

[Caesar_091]

Hello,

I'm wondering about a 4K display (and why not two of them!) on my mid 2012 Mac Pro.
1) I know that an nVidia GTX 750 or 960 or 970 or 980 will handle one of those on my config... and what about two 4k displys?
2) Will I be able to set display's brightness and contrast from Mac OS as one can do with any other Apple-made display? I can't do that on my DELL U2312HM...
3) If I buy a conventional PC card will it work out of the box except for booting logos and EFI stuff? Using a secondary low-demanding Apple video card will solve this issue right?
4) Will I need an external power supply? (I have read the thread... but I is there is no absolute conclusion?)
5) Is there something I missing or I will to face to take into account with a PC card or 4K displays?


TIA

 

[CapnDavey]

GTX680 and ATI 7950's are a good option both are easy to flash for boot screen's and both work out of the box!

 

[Synchro3]

GTX 680 has only one DisplayPort, so not possible to use two 4K display's.

 

[h9826790]

GTX 680 has only one DisplayPort, so not possible to use two 4K display's.

May be it's possible if the 2nd screen only display at 4k 30Hz.

 

[nigelbb]

May be it's possible if the 2nd screen only display at 4k 30Hz.

The HDMI port delivers 4K@30Hz. I am not sure why you would need 2x4K displays. I have a single 40" 4K display which is quite enough screen real estate & pixels for me

 

[Caesar_091]

Will a 2012 Mac Pro take full benefit from a 980Ti-6GB?
Should I go for a 960-4GB or a 980-4GB instead?

What do you suggest?
[doublepost=1478287420][/doublepost]The 960 (GM206) is the only full hardware HEVC/H265 decoding enabled for hardware decoding 4K movies and natively supporting HDCP 2.2 content over HDMI 2.0... while 970, 980 should support HEVC video encoding only.

Sources:
- https://forums.geforce.com/default/...-really-support-true-4k-hevc-h-265-decoding-/
- https://forums.adobe.com/thread/2018024
- http://forums.evga.com/H265-HEVC-Vi...nly-the-GeForce-GTX-960-decodes-m2283590.aspx