Broadcom Netlink Gigabit Ethernet Driver [best] Page

If the disconnections persist after trying the steps above, your motherboard likely has a dying capacitor on the LAN line—at that point, buy a $15 Intel PCIe network card and move on with your life.

While these chips are ubiquitous and generally reliable, they have a notorious reputation in the PC building community for one specific issue: broadcom netlink gigabit ethernet driver

If you have ever built a PC using an older OEM motherboard (Dell, HP, Lenovo) or picked up a budget workstation, chances are you have encountered the Broadcom NetLink Gigabit Ethernet controller. If the disconnections persist after trying the steps