What client (with graphical interface) consumes the least resources: qBittorrent, Transmission, Deluge... ?

I'm using qBittorrent, and when it downloads at max speed, (100MB/s for my laptop), it makes the computer quite irresponsive.

I don't know if the reason is because I'm using a network card (RTL8156) connected to the USB port. (Even though it's USB 3.2)

My disk is not the problem, it's a fast NVME, and the CPU is an i7-7700HQ.