34"+ Monitor + DVI-D to HDMI G5 Cable Solution

[mac57mac57]

Now that I have my AirQuad fully stable and fully loaded with applications, I am starting to do quite a bit of real-world work on it. I am finding that the monitor I am using with it is not bright enough... I have a large window right behind my desk.

Would anyone be able to recommend a combined solution of a new 34"+ monitor with 400± nit brightness, plus a DVI-D to HDMI cable that would support the native resolution of the monitor?

My AirQuad is equipped with an nVidia Quadro FX 4500, and so can support resolutions up to 3840x2400.

Thanks!

 

[joevt]

You need a Dual Link DVI display or a Dual Link DVI to DisplayPort adapter. I use this one:
https://gefen.com/product/dual-link-dvi-to-mini-dp-converter/
It should support any resolution/timing up to 330 MHz (the max of Dual Link DVI).

HDMI is basically Single Link DVI. HDMI 1.4 can go up to 340 MHz but Single Link DVI is limited to 165 MHz (same as HDMI 1.0).
https://en.wikipedia.org/wiki/HDMI
https://en.wikipedia.org/wiki/Digital_Visual_Interface

To convert Dual Link DVI to HDMI 1.4 requires a Dual Link DVI to DisplayPort adapter and a DisplayPort to HDMI adapter.
There is no such think as a Dual Link DVI to HDMI 1.4 adapter.

 

[Bug-Creator]

HDMI is basically Single Link DVI. HDMI 1.4 can go up to 340 MHz but Single Link DVI is limited to 165 MHz (same as HDMI 1.0).

Thats is not 100% true. 1st things 1st, SW is the key and if your OS/GFX driver does not support it....

All this done with MorphOS.

Got a nice R5 230 with 1 DVI and 2 DP (MorphOS can use such card without PPC OF) for my PCIe G5.
Didn't know that DP was not supported by MorphOS, so I hooked the 3440x1440 screen up over an active DualLink-DVI to DP adaptor and got 52Hz. Good enough. At one point I routed it through a simple DVI-HDMI adaptor and still got 52Hz.
Mkay so the idea was that this card didn't have a real DVI port but just a HDMI routed through the 1 Link.
Got similar results with other cards in the RadeonHD range.
Also got an X1950 (also just a PC version) which for sure has DualLink DVI and my 2 adaptors for sure work, but no success beyond FullHD. Thought that to be a bug, a bit back and forth and we ended up with an experimental driver that will do 2x2560x1440 at about 60Hz both over SingleLink->HDMI.
Going 3440x1440 with that card may be asking a bit to much, but I don't know for sure since that res is broken for every card with that driver.

nVidia Quadro FX 4500, and so can support resolutions up to 3840x2400.

Much older cards can (in theory) support such resolution, the question is at what refresh rates.
Depending on the timings the OS sets for the monitor (read what the monitor sends in specs) you might get offered something a bit over 50Hz.

 

[joevt]

Got a nice R5 230 with 1 DVI and 2 DP (MorphOS can use such card without PPC OF) for my PCIe G5.
Didn't know that DP was not supported by MorphOS, so I hooked the 3440x1440 screen up over an active DualLink-DVI to DP adaptor and got 52Hz.

What DualLink-DVI to DP adaptor did you use?

Good enough. At one point I routed it through a simple DVI-HDMI adaptor and still got 52Hz.
Mkay so the idea was that this card didn't have a real DVI port but just a HDMI routed through the 1 Link.

Right. Some DVI ports of some GPUs might support HDMI 1.4 data rates. Some might actually just be HDMI 1.4 ports - this is common with motherboards with DVI outputs sourced from Intel Graphics (Z170 era).

Was the output 4:4:4/RGB? Another way to exceed 165 MHz is to use 4:2:2 (248 MHz) or 4:2:0 (330 MHz). DVI only support RGB though. 4:2:0 is new with HDMI 2.0 so it's unlikely.

Also got an X1950 (also just a PC version) which for sure has DualLink DVI and my 2 adaptors for sure work, but no success beyond FullHD.

Maybe the DVI port of the X1950 doesn't support HDMI 1.4 data rates and maybe your Dual Link DVI to DisplayPort adapter is not Dual Link.

Thought that to be a bug, a bit back and forth and we ended up with an experimental driver that will do 2x2560x1440 at about 60Hz both over SingleLink->HDMI.

RGB?

Much older cards can (in theory) support such resolution, the question is at what refresh rates.
Depending on the timings the OS sets for the monitor (read what the monitor sends in specs) you might get offered something a bit over 50Hz.

Since the displays use DVI or HDMI, an EDID override device can alter what the display reports to the OS.

 

[Bug-Creator]

The adapters I used are Delock 62596 and I do have other systems where they are needed to get past FullHD.
All these screens are running in 24 bit, no compression, no HDR or any other fancy trickery.

What I do have is fine control over the timings on the 1st output which at least for the 3440 screen was needed as even when it was working the default refresh rate resulted in a bit rate that was flying just a little to close to the edge with occasional artifacts. Hence that 52Hz mode.

If you don’t have that fine control you might end up with a setup that works but is still unusable.

 

[joevt]

The adapters I used are Delock 62596 and I do have other systems where they are needed to get past FullHD.

Delock 62596 is just Single Link DVI input. It's basically just a HDMI 1.4 to DisplayPort adapter.
https://www.delock.com/produkt/62596/merkmale.html

They used a male Dual Link DVI connector with extra pins to trick people or because it's cheaper than a Single Link DVI connector with only the Single Link pins? It won't connect to female Single Link DVI connectors that are missing holes for the Dual Link DVI pins (if such connectors exist).