Its not new tech but you’d most likely only see this in a datacenter or buildings with 10 Gb connections as this is fiber optic cabling. One would need an SFP to actually connect it to the port however. Also the tips of the fiber were probably scratched when installing it into the vent holes so the whole cable will probably be replaced and then fixed, so there are multiple failures here.
This is what an SFP looks like.
You might run into PCIe lanes limitations on the 9k series so just double check what both the CPU and mobo can do when used together.