ATI Radeon HD 4870 and 10-bit color

I recently bought an ATI Radeon HD 4870 graphics card to the address used (Apple model #-MB999ZM/A) to install in my Mac Pro early 2008. This card was originally proposed by Apple as an upgrade to the previous Mac Pros. The card has a mini display port (and a DVI - D port). I'm under El Capitan on my Mac Pro. I have a NEC PA 302W monitor capable of 10-bit color. Can someone tell me if the ATI HD 4870 card supports 10-bit color to my monitor? I was encouraged to learn the Forum that pilots (and I hope that their updates) for graphics cards supported are automatically included in the Mac OS. I'd appreciate any help that anyone can give me. The card is scheduled to be delivered next week. Thank you, Jack

Apple has changed that in El Capitan. According to Mac and I, Apple has confirmed that the new 5 K and 4 K iMac (as well as the iMac 2014 5 K) supported a pilot chart 10-bit that has been activated with the release of El Capitan.

First of all, apparently it only works on the 4K & 5 K 2015 iMac & iMac 5 K 2014 now.
[UPDATE]: a cinema5D reader reported that he got 10 bits on a Mac Pro with D500 graphics and monitor Eizo CS230.

Also, currently it only works in preview and photo applications. If you want to test, you can take a photo RAW 12 bit with gradations of soft color and take a look. But it is also important to note that, for the moment, not other applications, such as Adobe or another editing software, take advantage of this treatment, again. This is just a preview of what is to come.

From:

https://www.cinema5D.com/5K-iMac-10-bit-color/

Apparently it's just this now. When/if 4870 supports, it's guessing.

Tags: Mac

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