BenQ EL2870U 28" HDR support via DP 1.4

disi · 20 Nov 2018 at 15:38

Doesn't DP usually have a higher bandwidth and quality than HDMI?

If I connect the monitor via DP (assumed 1.4) to my GPU, it says "HDR emulated".
The Radeon Tool offer me to change to 10 bpc (not sure what that is).
Windows offers me to enable HDR (which just makes everything greyish weird).

If I connect the monitor via HDMI (assumed 2.1) to my GPU, it says "HDR On".
The Radeon Tool does not offer me to change to 10 bpc (not sure what that is).
Windows offers me to enable HDR and it looks much better with HDR turned on (mouse cursor goes grey though).

Is my DP cable bugged or bad?
I am pretty sure I used it with the Samsung before?

https://www.overclockers.co.uk/benq...c-widescreen-led-monitor-black-mo-12s-bq.html

p.s. OK, this is the cable:OcUK Value 5m Male - Male Display Port Monitor Cable
https://www.overclockers.co.uk/ocuk-value-5m-male-male-display-port-monitor-cable-cb-072-ok.html
It says in the description: 8.64 Gbit/s data rate and WQXGA (2560×1600) resolution over a 3 metre cable.
The HDMI is way shorter, like 1.8m or so.

esoteric · 20 Nov 2018 at 17:34

That OcUK cable is DP 1.0 or 1.1a. It's the original, oldest and least capable DP cable.

Your monitor needs a 1.4 or 1.4a DP cable to unlock it's full potential.

Good luck finding one though, not because they are rare, it's because VESA don't want the cable version advertised when being sold and that makes it unnecessarily difficult to find the correct DP cable you need when you get such crap product information offered. That being said some do ignore it and advertise the cable model.

Did you not get a DP cable in the box with your monitor btw?

I'll post a link to wikipedia's page, you'll need it to cross reference a piece of information given about a cable to find it's version number. I did the same thing to find out OcUK's cable is 1.0/1.0a.

https://en.wikipedia.org/wiki/DisplayPort#Versions

disi · 20 Nov 2018 at 20:08

Thank you!
I just ordered this one:
CLUB3D Displayport to Displayport 1.4/Hbr3 Cable DP 1.4 8K 60Hz 3M/9.84', 28AWG black, Vesa Certified (CAC-1060)
delivery Friday

The monitor only came with hdmi.

esoteric · 20 Nov 2018 at 22:33

Hope it works out.

disi · 22 Nov 2018 at 01:42

Here are the specs with the new cable:
Horizontal Timing Total - 4400
Horizontal Timing Display - 3840
Horizontal Timing Front Porch - 176
Horizontal Timing Sync Width - 88
Vertical Timing Total - 2250
Vertical Timing Display - 2160
Vertical Timing Front Porch - 8
Vertical Timing Sync Width - 10
Horizontal Timing Polarity - Positive
Vertical Timing Polarity - Positive
Interlaced/Progressive - Progressive
G.Pixel Clock (KHz) - 593400
G.Refresh Rate (Hz) - 59.9394
Current HDCP Status - Disabled
Current Link Settings - 5.4 Gbps x 4

p.s. and now I can turn on HDR via DP

pps. here with HDMI cable:
Horizontal Timing Total - 4400
Horizontal Timing Display - 3840
Horizontal Timing Front Porch - 176
Horizontal Timing Sync Width - 88
Vertical Timing Total - 2250
Vertical Timing Display - 2160
Vertical Timing Front Porch - 8
Vertical Timing Sync Width - 10
Horizontal Timing Polarity - Positive
Vertical Timing Polarity - Positive
Interlaced/Progressive - Progressive
G.Pixel Clock (KHz) - 593400
G.Refresh Rate (Hz) - 59.9394
Current HDCP Status - Disabled
Current Link Settings - Not Available

disi · 4 Dec 2018 at 08:37

Just saying, I love this monitor now.
Good colour and picture.

60Hz is enough for me, especially at 1440p I may reach some 120+fps in situations/games (currently X4 Foundations), but this makes it even smoother or the card can relax a little.
At 4K my card only produces some 40fps on high settings and is not enough.
Only very little annoying is, the monitor always pops up with "Recommended resolution 4K" something.

It is not too big and not too small on the desk.

There is no tearing (Freesync works) and no lagging grey areas, like I had on the VA panel with 144Hz.

If I sack into my chair and slide too much down to watch some movie, I need to adjust the angle a little. You always want to make sure to look directly at the monitor, a little bit off and the picture gets dark (like a privacy screen).