Adding 4 more 2.5GbE interfaces to the GMKtec NucBox G9

The author installed four Intel I226-V 2.5 GbE NICs in a GMKtec NucBox G9, confirming they functioned out-of-the-box on Alpine Linux and achieved near-full 2.5 Gbps throughput. Concern over the device’s hot-spot thermal behavior and unreliable eMMC storage prompted the upgrade, while a spare G9 was sourced on eBay for $150.