Quantization Range missing with native HDMI connected to ARC A750 but visible with integrated UHD750

[OH2TWI]

Hi,

I have a Shuttle SH570 with Intel i9-11900K (with integrated UHD 750) & 128GB DDR4, supporting Resizable BAR. In addition, I have an Intel Arc A750 in a PCIe slot. Running Windows 11 Enterprise Insider Preview Canary.

My monitor is an Optoma UHD 4K projector, connected through a Yamaha RX-V781 7.1 amplifier. Also using 7.1 audio through HDMI. High quality HDMI cables all the way, no adapters.

I use several other sources for the Yamaha amp and Optoma UHD projector with Full 0-255 range, so the display is configured to receive 0-255 range.

If I connect the Shuttle via integrated HDMI, using the integrated UHD750 as the primary adapter, I can set Quantization Range in the Intel Graphics Software (IGS) Display Settings to Full.

However, If I connect the same HDMI cable to the Intel Arc 750 HDMI port and configure the Shuttle to use the PCIe card as the primary display, the "Quantization Range" is no longer present in the IGS DIsplay settings, and my colors are washed out. Both adapters are detected and usable by Windows 11, but I would like to use the Arc 750 as primary for eg. SDR radio applications and not always configure it through Windows graphics settings.

I'm running latest software:

Intel Graphics Software 25.18.1403.1

Graphics Driver 32.0.101.6881

I have another fairly similar but older MSI Z270 + i7-7700K+64GB setup but with NVIDIA RTX 4070Ti adapter, which outputs 0-255 normally to the same amp/display setup.

I like the Vulkan API capabilities (and diversity in general) in this Arc 750 and I would not like to switch to NVIDIA just for the missing dynamic range. Is this something that could be fixed by Intel?

Best regards,

Pasi OH2TWI

[JedG_Intel]

Hello OH2TWI,

Thank you for posting on Intel Community Forum.

It appears that you're having issues with Quantization Range when using Intel Arc A750. To address this properly, please share the information below.

1. Were you able to have access to Quantization Range with Arc A750 previously?

2. Have you tried using a different HDMI port on the monitor or a different cable?

3. Have you tested the Arc A750 with a different monitor to see if the issue persists?

Additionally, to have a better understanding of your system configuration and components please generate System Support Utility (SSU) report. Please follow instructions here and send the report - How to get the Intel® System Support Utility Logs on Windows*

I look forward to your response.

Best regards

Jed G.

Intel Customer Support Technician

[VonM_Intel]

Hello OH2TWI,

Have you had a chance to review my previous response? Please let us know if you require any further assistance. I'm here to help.

Best regards,

Von M.

Intel Customer Support Technician

[JedG_Intel]

Hello OH2TWI,

I have not heard back from you so I will close this inquiry now. If you need further assistance, please submit a new question as this thread will no longer be monitored.

Best regards,

Jed G.

Intel Customer Support Technician