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OLED 4K 30" 60 Hz - Dell UP3017Q - Page 6

post #51 of 627
Quote:
Originally Posted by Blackvette94 View Post

I have the 55C7, already put 77hrs on it gaming!

I also have the Leo Bodnar tester. I tested PC mode and even ISF bright and Dark modes give 21ms and this is with 4:4:4!

Also if you set oled light to 35 or lower there is NO ABL!

I reached out to Rtings to let them know this.

I also have the B6 oled and the C7 is a massive massive upgrade in all respects! 1080p 120hz looks insane on here in pc mode in ISF mode! Dat low input lag doe :0

I still will grab this dell oled if the lag is lower then the lg c7 but it is going to be hard going away from native 120hz oled goodness I have now!!

PS. You can disable the auto dim feature for static screens in the service menu, I used the lg service remote app on android to do it , it is under oled and you choose tfc enable to off. I rechecked with Leo Bodnar and there was NO change to lag!
Thank you! Is the input lag at 1080p120 still 21 ms?
post #52 of 627
Quote:
Originally Posted by Sempre View Post

Can HDMI 2.1 provide bandwidth for 4:4:4 4k HDR 120Hz uncompressed?

Yes.
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post #53 of 627
Quote:
Originally Posted by boredgunner View Post

Yes.

Then I suppose seeing LG OLED TVs with high refresh rates and Freesync 2 in 2018 isn't out of the question entirely. I hope.
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post #54 of 627
Quote:
Originally Posted by CeeeJaaay View Post

Thank you! Is the input lag at 1080p120 still 21 ms?

No, it is half that at 120hz native, 10.5ms smile.gif
post #55 of 627
Quote:
Originally Posted by boredgunner View Post

It's probably to avoid retention or burn-in. However, ABL dims a sustained bright image down to around 120 cd/m2 on 2016 models and 135 cd/m2 on the C7, both of which are more or less ideal brightness settings for a dark entertainment room.

Rtings used 100% contrast, that effects the ABL on the 2017's. At 85 contrast and 35 oled light there is NO ABL and it is at 150nits which for sdr is very bright smile.gif
post #56 of 627
Quote:
Originally Posted by Blackvette94 View Post

Rtings used 100% contrast, that effects the ABL on the 2017's. At 85 contrast and 35 oled light there is NO ABL and it is at 150nits which for sdr is very bright smile.gif

Good to know. I suppose 85 contrast doesn't make it look noticeably worse to you? They did get a near perfect calibration on the C7, I wouldn't want to take away from that.

Also even 135 nits is higher than what I use on my XB270HU, so ABL isn't even a concern for me. I pretty much game in the dark except for my bias light.
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post #57 of 627
Quote:
Originally Posted by Blackvette94 View Post

No, it is half that at 120hz native, 10.5ms smile.gif
That's impressive. Last question, does 120 Hz work with anything higher than 1080p? Say 1440p120.
post #58 of 627
Quote:
Originally Posted by Zurv View Post

nothing can do 4:4:4 HDR at 4k over HDMI. It just a hard bandwidth limit. HDR requires 10bit+ color. There isn't enough bandwidth for 4:4:4 and 10bit color. for 4:4:4, with hdmi 2.0, 8bit is the max.

That said, there is a HDR game mode in 2017 just like what was added in for the 2016 models.

Not true, actually. DisplayPort 1.2 (2009) supports 4K (3840×2160) at 10 bpc (30 bit/px) RGB/YCbCr 4:4:4 at 60 Hz. Though it doesn't support HDR, because 2009. HDMI 2.0 (2013) maxes out at 4K 60 Hz RGB at only 8 bpc, but DisplayPort 1.2 has 20% more bandwidth than HDMI 2.0, despite popular belief that "they're the same bandwidth, cuz they both max at 4K 60 Hz". 10 bpc color depth requires 25% more bandwidth than 8 bpc, but there's also some room to play with since 4K 60 Hz 8 bpc only uses about 90% of HDMI 2.0's bandwidth.

DisplayPort 1.3 (2014) supports 50% more bandwidth than DP 1.2, more than enough for 4K 60 Hz 10 bpc RGB/YCbCr 4:4:4 (as I said, DP 1.2 was enough for that already). HDR support wasn't introduced until DisplayPort 1.4 (2016), but that was released very shortly after v1.3 because it was basically just an addendum, there were delays on finalizing HDR and DSC, so rather than delay the v1.3 spec further, they just published v1.3 without those, then added v1.4 about 18 months later with the HDR and DSC support originally planned for v1.3. As far as I know, no products were ever produced with DisplayPort 1.3, so things are skipping straight to v1.4 so HDR support shouldn't be a problem here.

Just for reference:

HDMI 2.0:           18.0 Gbit/s bandwidth, 14.40 Gbit/s data rate (80% efficient with 8b/10b encoding)
DisplayPort 1.2:   21.6 Gbit/s bandwidth, 17.28 Gbit/s data rate (8b/10b)
DisplayPort 1.3:   32.4 Gbit/s bandwidth, 25.92 Gbit/s data rate (8b/10b)
HDMI 2.1:           48.0 Gbit/s bandwidth, 42.6666... Gbit/s data rate (88.8% efficient with 16b/18b encoding)

3840×2160 at 60 Hz with 10 bpc RGB or YCbCr 4:4:4 color with CVT-RB timing overhead (a mouthful I know, but it's all relevant tongue.gif) requires a data rate of 16.0 Gbit/s. The same at 8 bpc requires 12.8 Gbit/s. So HDMI 2.0 can support 8 bpc, but not 10 bpc, while DisplayPort 1.2 supports both, and with a comfortable margin (and in fact does, in real products).

In fact, 2560×1440 at 165 Hz with 8 bpc color requires more bandwidth than 4K 10 bpc; around 16.8 Gbit/s, and I think it's well known that DP 1.2 can do that one.

HDMI 2.1's data rate is just enough for 4K 144 Hz 10 bpc (HDR) with RGB or Y4:4:4, which takes ≈40.0 Gbit/s.
Edited by Glenwing - 4/14/17 at 11:17am
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post #59 of 627
Quote:
Originally Posted by Glenwing View Post

HDMI 2.1's data rate is just enough for 4K 144 Hz 10 bpc (HDR) with RGB or Y4:4:4, which takes ≈40.0 Gbit/s.

That's more bandwidth than a lot of PCIe ports...
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post #60 of 627
Quote:
Originally Posted by Glenwing View Post

Not true, actually. DisplayPort 1.2 (2009) supports 4K (3840×2160) at 10 bpc (30 bit/px) RGB/YCbCr 4:4:4 at 60 Hz. Though it doesn't support HDR, because 2009. HDMI 2.0 (2013) maxes out at 4K 60 Hz RGB at only 8 bpc, but DisplayPort 1.2 has 20% more bandwidth than HDMI 2.0, despite popular belief that "they're the same bandwidth, cuz they both max at 4K 60 Hz". 10 bpc color depth requires 25% more bandwidth than 8 bpc, but there's also some room to play with since 4K 60 Hz 8 bpc only uses about 90% of HDMI 2.0's bandwidth.

DisplayPort 1.3 (2014) supports 50% more bandwidth than DP 1.2, more than enough for 4K 60 Hz 10 bpc RGB/YCbCr 4:4:4 (as I said, DP 1.2 was enough for that already). HDR support wasn't introduced until DisplayPort 1.4 (2016), but that was released very shortly after v1.3 because it was basically just an addendum, there were delays on finalizing HDR and DSC, so rather than delay the v1.3 spec further, they just published v1.3 without those, then added v1.4 about 18 months later with the HDR and DSC support originally planned for v1.3. As far as I know, no products were ever produced with DisplayPort 1.3, so things are skipping straight to v1.4 so HDR support shouldn't be a problem here.

Just for reference:

HDMI 2.0:           18.0 Gbit/s bandwidth, 14.40 Gbit/s data rate (80% efficient with 8b/10b encoding)
DisplayPort 1.2:   21.6 Gbit/s bandwidth, 17.28 Gbit/s data rate (8b/10b)
DisplayPort 1.3:   32.4 Gbit/s bandwidth, 25.92 Gbit/s data rate (8b/10b)
HDMI 2.1:           48.0 Gbit/s bandwidth, 42.6666... Gbit/s data rate (88.8% efficient with 16b/18b encoding)

3840×2160 at 60 Hz with 10 bpc RGB or YCbCr 4:4:4 color with CVT-RB timing overhead (a mouthful I know, but it's all relevant tongue.gif) requires a data rate of 16.0 Gbit/s. The same at 8 bpc requires 12.8 Gbit/s. So HDMI 2.0 can support 8 bpc, but not 10 bpc, while DisplayPort 1.2 supports both, and with a comfortable margin (and in fact does, in real products).

In fact, 2560×1440 at 165 Hz with 8 bpc color requires more bandwidth than 4K 10 bpc; around 16.8 Gbit/s, and I think it's well known that DP 1.2 can do that one.

HDMI 2.1's data rate is just enough for 4K 144 Hz 10 bpc (HDR) with RGB or Y4:4:4, which takes ≈40.0 Gbit/s.

I said over HDMI 2.0. And HDMI 2.0 can't do 4:4:4 anything with 10bit at 4k@60. Do whatever math you'd like to, but it doesn't work. It would be great if TVs used DP.. but sadly they don't and most likely never will. What does confuse me is why monitors are still using DP 1.2.

My dell Oled will be on Monday! woot!
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