blah238
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I just installed my new 2x GTX 970s ( http://www.evga.com/Products/Product.aspx?pn=04G-P4-1970-KR) and installed the newest drivers (344.16). I have connected the primary card's HDMI port to my LG 49UB8500 4K HDTV on its HDMI 2.0 port using the HDMI cable that came with it. In the NVIDIA control panel, I do not get a 60Hz option at 4K except under the "PC resolutions" section which when selected reduces the color quality (4:2:0 chroma subsampling) just like my GTX 670s did. The main reason I bought these was to get 4K60 at full 4:4:4 RGB. Disappointing, to say the least. Can someone from EVGA confirm whether these cards have HDMI 2.0 or not?
post edited by blah238 - 2014/09/24 15:57:14
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blah238
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Re: GTX 970 not HDMI 2.0?
2014/09/24 16:02:38
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Scratch that, I just had to enable the "Deep Color" setting on my LG TV. Glorious 4:4:4 color @ 4K60 is mine! 
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VVhiplash
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Re: GTX 970 not HDMI 2.0?
2014/09/24 17:42:48
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Oh good, nice to see you found a solution. You should post some pictures though! I've got my computer hooked up to a 55" 1080p in my living room, so I can only imagine what a couple of 970s next to a 4k tv would look like. Bet thats amazing. Have you tried gaming yet? Do the 970s pull their load well?
ll Steiger-Dynamics Maven ll Intel i7-5930k 4.2Ghz ll ASRock X99 Extreme6/AC ll Liqmax II 240 ll GeiL Super-Luce 32gb 2666mhz ll (x2)EVGA GTX 980 SC ll Samsung XP941 500gb and 850 Pro 1TB ll EVGA PS 1000W Platinum ll
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blah238
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Re: GTX 970 not HDMI 2.0?
2014/09/24 17:57:02
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Whiplash88
Oh good, nice to see you found a solution. You should post some pictures though! I've got my computer hooked up to a 55" 1080p in my living room, so I can only imagine what a couple of 970s next to a 4k tv would look like. Bet thats amazing. Have you tried gaming yet? Do the 970s pull their load well?
Well I've only spent a few minutes with it so far, but to be honest I was a little underwhelmed by the single GPU performance at 4K, and even more disappointed at the SLI microstutter at 4K. Good framerates but the stutter makes it worse than just disabling SLI. This was only in one game, and an older, DX9-based game at that (Tribes: Ascend), but as it's one of my favorite games it does mean more to me than most. Will try on some other games later. edit: Much better results with another game, Assetto Corsa. After figuring out how to get SLI working (set reflection faces per frame to 6 in the game's options) I am able to run at 4K with all max settings and 4xAA at around 60FPS. No discernible microstutter.
post edited by blah238 - 2014/09/24 21:54:39
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x3sphere
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Re: GTX 970 not HDMI 2.0?
2014/09/24 20:56:40
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You sure you didn't do anything else other than enable Deep Color?
I don't have the LG, but my Samsung HU8550 seems stuck at 4:2:0. Outputs 4:4:4 fine in 30 Hz.
What HDMI cable are you using?
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blah238
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Re: GTX 970 not HDMI 2.0?
2014/09/24 21:20:28
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x3sphere
You sure you didn't do anything else other than enable Deep Color?
I don't have the LG, but my Samsung HU8550 seems stuck at 4:2:0. Outputs 4:4:4 fine in 30 Hz.
What HDMI cable are you using?
Nope, that was it. Just using the HDMI cable that came with the TV. It says Freeport 4K x 2K High Speed HDMI Cable with Ethernet on it, that's about it. You connecting straight to the TV or through a receiver?
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blah238
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Re: GTX 970 not HDMI 2.0?
2014/09/24 21:24:03
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Also just tried with a cheap ProHT #08240 cable and still works fine, 4:4:4 at 60Hz.
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x3sphere
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Re: GTX 970 not HDMI 2.0?
2014/09/24 21:27:21
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blah238
x3sphere
You sure you didn't do anything else other than enable Deep Color?
I don't have the LG, but my Samsung HU8550 seems stuck at 4:2:0. Outputs 4:4:4 fine in 30 Hz.
What HDMI cable are you using?
Nope, that was it.
Just using the HDMI cable that came with the TV. It says Freeport 4K x 2K High Speed HDMI Cable with Ethernet on it, that's about it.
You connecting straight to the TV or through a receiver?
Straight to the TV. Might have to try a different cable, I'm not sure what else it could be at this point. There is no Deep Color on my Samsung but I enabled UHD Color Mode which seems to be the equivalent. The manual says 4:4:4 @ 60 Hz is supported with that on.
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blah238
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Re: GTX 970 not HDMI 2.0?
2014/09/24 21:48:14
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I did have to power the TV off and back on after changing that setting, but that's it.
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Ryan1685
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Re: GTX 970 not HDMI 2.0?
2014/10/13 12:42:48
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have you solved this problem yet. I have two of these Samsung tvs hu855 that I want to use with a gtx970 have you achieved 4k at 60hz yet
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Ryan1685
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Re: GTX 970 not HDMI 2.0?
2014/10/14 22:14:12
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EVGA_JacobF
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Re: GTX 970 not HDMI 2.0?
2014/10/15 10:29:25
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4:4:4 is fully supported on 970/980 as long as the TV supports it.
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Ryan1685
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Re: GTX 970 not HDMI 2.0?
2014/10/15 12:06:41
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I concur, I am getting 4K at 60HZ with my GTX970 though HDMI on my Hdmi 2.0 capable samsung 4K tv
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stevsaunders
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Re: GTX 970 not HDMI 2.0?
2019/08/08 00:13:59
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It could default to 1.4 which limits HDR to 30Hz refresh rates. Try to manually change HDMI inputs from AUTO, reboot, and start working again.
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