Have you read the standard of DP & HDMI ports at currently?
It could not support 4k@144hz at one port, it's the next patch, not now one(on the market).
The next patch support 4k@120hz (or two 4k@60hz by using one port) and 5k@60hz, it increases the bandwidth.
However the next patch had already released, but no port in graphic card and monitor support it at the civil market, the maximum is 4k@60hz.
If you have a powerful graphic card could run the dcs at 4k with 144hz, you still could not out put it.
And I said maybe you need 2 or 3 port which only support 4k@60hz to output the graphic on the monitor, so it needs 2 or 3 cable.
The reason and logic is this, the port has not enough bandwidth to output such high resolution and frequency.