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@Jean_Intel wrote:We also noticed that you are using DP to HDMI cables. We always recommend using a straight connection since the use of adapters or converters can cause compatibility problems.
I agree, but your video card only has 1 HDMI port.
This looks like a sync problem.
The ULT-WIIQ cables must contain an active protocol converter. Otherwise, no image would be displayed at all. Based on the technical specifications and the type of cable, I would guess the Synaptics VMM7100. Is this your cable?
Please check as follows what kind of chip is installed there. For this check, do not connect both cables at the same time, only one at a time.
- Plug ONE cable to the graphics card and a display
- Download the package attached
- Unzip and right click "VmmDPTool.exe" and choose "Run as administrator"
- If a dialog box appears stating the Product ID did not match, click Yes to proceed
- Continue this way:
If CHIP ID = VMM7100 and the firmware version older than 7.02.130 then you can perform a firmware update on the chip using the firmware file in the attachment. Proceed as follows:
- Wait for the firmware update process to finish.
Disconnect and reconnect the cable from the computer.
Repeat all steps with the second cable.
I have successfully completed the update process myself on a DP > HDMI cable with VMM7100. However, I cannot promise that your problem will go away. But there is currently no newer firmware for this chip.
This firmware does NOT apply to USB-C/Thunderbolt cables ! Do not flash such cables !
I updated the firmware on both cables, (you sure know your stuff!) Unfortunately, it didn't work but you say I need an "active" adapter? Are you talking about something like these:
DisplayPort 1.4 to HDMI 2.1 HDR Active Adapter
or
SIIG Active DisplayPort to HDMI Adapter 8K
or
UPTab DisplayPort 1.4 to HDMI 2.1 Active Adapter with HDR Support
I see other "active" adapters that go from HDMI to DP with USB power, but I can't see any DP to HDMI.
Asus ROG Strix G15 G512 is a Comet Lake platform (10th Gen Intel Core i7 CPU). The external display connectors are served via an Nvidia GeForce RTX 2070 SUPER GPU (N18E-G2R).
If you are using the current Asus graphics driver for this platform but it still doesn't work, it is advisable to ask Asus which cable is needed to use the full capabilities of the USB-C interface. However, they will probably recommend a DisplayPort connection. Unfortunately, there may be an incompatibility with the VMM7100.
Did I understand correctly that the update process was completed successfully and both cables work, but the original problem was not solved?
Sorry if I expressed myself misleadingly. The ULT-WIIQ cable with the VMM7100 is already an active adapter. As far as I know, you have the best there is right now. I run the Club 3D CAC-1087 (also VMM7100) on an Intel Arc A380 and achieve this in my home cinema:
This image was photographed from an LG OLED65G39LA TV. The used graphics card is a background image in Microsoft Windows. The dark blue box in the lower part of the screen is the On Screen Display (OSD) of the new AV Receiver Denon AVC-X4800H and shows its signal diagnosis. The green writing is the HDfury VRROOM signal diagnostics OSD laced between the source and the AV Receiver.
If the display is a JVC DLA-NZ8 projector then this solution can operate at 8K @ 60 Hz YCbCr 4:2:0 10 bpc HDR (40 Gbps, FRL5).
I tested quite a few adapters looking for the best solution. To my knowledge, there are the following active protocol converter chips:
- Synaptics VMM7100 (predecessor VMM6100). This is also used in your first link of an "active adapter". However, due to the smaller number of connectors, cables are preferable to those short adapters with socket connectors where you need another cable
- Realtek RTD2173
- Parade Tech PS196
The RTD2173 is used by Intel on the Arc A770 board to provide HDMI 2.1 Fixed Rate Link (FRL). It is fed by the DisplayPort main link from the GPU. See this. But in external adapters like your linked SIIG product, this chip did not convince. Embedded in adapter housings, it often has a problem with heat build-up and then becomes unstable. But there are people who have already equipped these adapters with cooling fins and allegedly had better success then. I tested this one.
The PS196 is almost unavailable on the market. I tested this cable. With the Intel Arc A380, the cable works well with TMDS up to 4K @ 60 Hz. FRL for higher refresh rates is usually not present and if it is, then the picture has small optical errors. What's causing this will probably never really be known in the signal chain I'm using. However, this cable works very well with the Nvidia RTX A2000. One could therefore assume that Intel's interface compatibility is somewhat worse than that of Nvidia. Adaptive Sync is grayed out although HDMI VRR is reported by the EDID. But VRR does not work properly with any adapter or converter cable on any GPU brand. This cannot be attributed solely to the GPU anyway, since the display also plays a major role.
Your third link leads to a TMDS adapter. HDMI 2.0a, 4K @ 60 Hz only!
It's been my experience that HDR can regularly cause issues. Can your 3 TVs/monitors be operated stable at 4K 120 Hz at the same time without HDR?
