Cryptic645
Novice Member
Hi there,
I would like to connect my gaming system from the office room with the tv from the living room. In perspective, the cable should be hidden in the wall, hence the necessary length of 30 meters. For this I tried somewhat expensive cable from Jenving (SUPRA - HDMI 2.1 AOC (optical) 8k/HDR 30 Meter cable).
The components used for testing always had the latest firmware or driver version.
LG OLED 77 C9PLA, Firmware 05.00.10
Gigabyte NVIDA RTX 3080 Gaming OC, 461.09
Within the HDMI 2.1 specification I intend to run 3840x2160p in 10 bit + VRR /G-Synch over the 30 meters distance. Unfortunately, I cannot operate the components with the 30 meters Supra cable (but it works with a cheapo 3 meter Hdmi cable).
I tried several settings with the 30-meter super cable, of which the following settings worked:
1920x1080p @ 120 hz, RGB 10 bit
1920x1080p @ 120 hz, RGB 12 bit
2560x1440p @ 60 hz RGB, 8 Bit, G-Synch
3840x2160p @ 60 hz, 4:4:4 with G-Synch – 8 bit
3840x2160p @ 60 hz, 4:2:0 with G-Synch – 10 bit
3840x2160p @ 50 hz, RGB with G-Synch – 8 bit
3840x2160p @ 30 hz RGB - no G-Synch - 10 bit
The following settings did not work with the 30 meters Supra cable:
3840x2160p @ 50 hz, RGB with G-Synch – 10 bit
3840x2160p @ 60 hz, 4:4:4 G-Synch – 10 bit (screen flickers rarely for one second before going black)
3840x2160p @ 60 hz, 4:4:4 no G-Synch – 10 bit
3840x2160p @ 60 hz, 4:2:2 no G-Synch – 8 bit
3840x2160p @ 100 hz, 4:2:0 no G-Synch 8 bit
3840x2160p @ 120 hz, 4:2:0 no G-Synch 8 bit
3840x2160p @ 120 hz, 4:2:0 with G-Synch 8 bit
Variance of testing:
All tests have been made with and without LGs Instant Gaming Response / VRR / G-Synch and with and without LGs Ultra HD Deep Color enabling option.
I tested the cable in the rolled-in state as well as in the unrolled state, in case there should be any differences. Kinks or other damage are not visible.
When I applied the desired settings (3840x2160p @ 120 hz, 10 bit RGB) for the first time with the Supra cable, the TV flickered for several seconds and the picture appeared partly. After that, the picture was no longer displayed. In subsequent attempts, the flickering never occurred again, the picture remained permanently black for those settings. Only the previously listed settings work reliably.
The settings that were the most closely aligned with the desired target, using the Supra cable were:
3840x2160p @ 60 hz, 4:4:4 with G-Synch – 8 bit
Interestingly for 3840x2160p @ 60 hz, 4:4:4 with G-Synch –10 bit the picture flickers for 1 second and then the screen goes black sometimes.
For reference, a no name HDMI 2.1 cable in 3 meters I got from Amazon for 16 € works at the following desired settings.
3840x2160p @ 120 hz, 10 bit RGB with working G-Synch
I assume that it also works for outputs with a lower bandwidth.
All components support DSC (if necessary?)
For the record, both the graphics card and the TV support HDMI 2.1 and the supra cable was used in the correct orientation. No other devices were connected to the TV while testing. Multiple HDMI ports of the devices were used during testing, although every single port supports HDMI 2.1 at 48 Gbit/s.
The Supra cable requires a voltage of 5 volts from the HDMI port for operation. So far, I could not find any data whether the RTX 3080 also provides this. I wonder if a too low output voltage means that only the signals with a high bandwidth are not transmitted.
Does anyone have a tip or approach to this?
I would like to connect my gaming system from the office room with the tv from the living room. In perspective, the cable should be hidden in the wall, hence the necessary length of 30 meters. For this I tried somewhat expensive cable from Jenving (SUPRA - HDMI 2.1 AOC (optical) 8k/HDR 30 Meter cable).
The components used for testing always had the latest firmware or driver version.
LG OLED 77 C9PLA, Firmware 05.00.10
Gigabyte NVIDA RTX 3080 Gaming OC, 461.09
Within the HDMI 2.1 specification I intend to run 3840x2160p in 10 bit + VRR /G-Synch over the 30 meters distance. Unfortunately, I cannot operate the components with the 30 meters Supra cable (but it works with a cheapo 3 meter Hdmi cable).
I tried several settings with the 30-meter super cable, of which the following settings worked:
1920x1080p @ 120 hz, RGB 10 bit
1920x1080p @ 120 hz, RGB 12 bit
2560x1440p @ 60 hz RGB, 8 Bit, G-Synch
3840x2160p @ 60 hz, 4:4:4 with G-Synch – 8 bit
3840x2160p @ 60 hz, 4:2:0 with G-Synch – 10 bit
3840x2160p @ 50 hz, RGB with G-Synch – 8 bit
3840x2160p @ 30 hz RGB - no G-Synch - 10 bit
The following settings did not work with the 30 meters Supra cable:
3840x2160p @ 50 hz, RGB with G-Synch – 10 bit
3840x2160p @ 60 hz, 4:4:4 G-Synch – 10 bit (screen flickers rarely for one second before going black)
3840x2160p @ 60 hz, 4:4:4 no G-Synch – 10 bit
3840x2160p @ 60 hz, 4:2:2 no G-Synch – 8 bit
3840x2160p @ 100 hz, 4:2:0 no G-Synch 8 bit
3840x2160p @ 120 hz, 4:2:0 no G-Synch 8 bit
3840x2160p @ 120 hz, 4:2:0 with G-Synch 8 bit
Variance of testing:
All tests have been made with and without LGs Instant Gaming Response / VRR / G-Synch and with and without LGs Ultra HD Deep Color enabling option.
I tested the cable in the rolled-in state as well as in the unrolled state, in case there should be any differences. Kinks or other damage are not visible.
When I applied the desired settings (3840x2160p @ 120 hz, 10 bit RGB) for the first time with the Supra cable, the TV flickered for several seconds and the picture appeared partly. After that, the picture was no longer displayed. In subsequent attempts, the flickering never occurred again, the picture remained permanently black for those settings. Only the previously listed settings work reliably.
The settings that were the most closely aligned with the desired target, using the Supra cable were:
3840x2160p @ 60 hz, 4:4:4 with G-Synch – 8 bit
Interestingly for 3840x2160p @ 60 hz, 4:4:4 with G-Synch –10 bit the picture flickers for 1 second and then the screen goes black sometimes.
For reference, a no name HDMI 2.1 cable in 3 meters I got from Amazon for 16 € works at the following desired settings.
3840x2160p @ 120 hz, 10 bit RGB with working G-Synch
I assume that it also works for outputs with a lower bandwidth.
All components support DSC (if necessary?)
For the record, both the graphics card and the TV support HDMI 2.1 and the supra cable was used in the correct orientation. No other devices were connected to the TV while testing. Multiple HDMI ports of the devices were used during testing, although every single port supports HDMI 2.1 at 48 Gbit/s.
The Supra cable requires a voltage of 5 volts from the HDMI port for operation. So far, I could not find any data whether the RTX 3080 also provides this. I wonder if a too low output voltage means that only the signals with a high bandwidth are not transmitted.
Does anyone have a tip or approach to this?