On Mon, Feb 10, 2020 at 12:42:37PM -0500, Nicholas Krause wrote:
Probably but PCI 4.0 doubled its speed without wire changes or additions just a protocol change. Maybe HDMI can't do that or only for minor version changes. That was from just under 16GBs to just under 32GBs in a x16 lane.
HDMI is just as backwards compatible as PCIe. Same connector, same wires, different signalling depending on the negotiation of the two devices involved. Just rather pathetic that intel's graphcis chips are so outdated that they can't drive a modern display at a decent resolution and framerate. They can use it, but at very low frame rate. Same as PCIe. You only get 4.0 speed if both the machine and the card support it, otherwise it falls back to the best that both support. If you need 4.0 speed, but the machine doesn't support it, then you are out of luck. The state of intel's graphics is like someone selling PCIe 2.0 machines while 4.0 is the current version. -- Len Sorensen