Ubuntu 20.04 LTS

Pre-installed in some regions with a custom Ubuntu image that takes advantage of the system's hardware features and may include additional software. Standard images of Ubuntu may not work well, or at all.

Network throughput is limited by the CPU C States setting. In order to maximize the throughput, C States need to be disabled in the BIOS:

1. Enter BIOS
2. Advanced -> Power & Performance -> CPU - Power Mgt Control -> C states

Another option is to install a separate network driver from Realtek: https://www.realtek.com/zh-tw/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software