Display Stream Compression and Display Cloning

Everything about displays and monitors. 120Hz, 144Hz, 240Hz, 4K, 1440p, input lag, display shopping, monitor purchase decisions, compare, versus, debate, and more. Questions? Just ask!
Post Reply
evmadic
Posts: 52
Joined: 20 Feb 2022, 04:13
Contact:

Display Stream Compression and Display Cloning

Post by evmadic » 26 Mar 2023, 05:40

I run a dual-pc set up for my gaming and streaming PCs. To do so, I clone my gaming display to my capture card.
My current gaming display is 1080p 240hz, and my capture card is 1080p 60hz.

Does anyone know if cloning a display adds signal bandwidth? The reason I ask is because I was thinking about upgrading to the Alienware 1080p 500hz display but I have some reservations about DisplayPort 1.4's bandwidth limitation of 32.4gbps.

To avoid active DSC, I would have to set the color depth factor to 8bpc: 1920x1080 @500hz w/CDF of 8 = 31.10 Gbps.

Even at 8bpc, if I account for another 60hz refresh rate to clone it, I'm well above DP 1.4's 32.4 Gbps limit and DSC will be active.
But I don't know if display cloning adds signal bandwidth. Can anyone confirm if it does?
5800x3d, RTX 4070 ti, Acer Nitro XV252QF 390Hz
https://www.twitch.tv/evmadic

Post Reply