>finally got my own network camble crimper
>make a couple test cables
>time to test them, put a spare network card in my PC and grab the neighbor's laptop, boot some linux iso and connect them together
>no carrier
>connect the cable directly to my router
>100 mbps
>check lspci
>Fast Ethernet Controller
The laptop was made well into the late 2000s if not 2010s, gigabit should've been ubiquitous at this point already. Either way, apparently this Marvell Yukon chip has trouble autonegotiating with some other cards, I eventually managed to extend my cable to fit into one of my mini-PCs, and everything's working as intended fullspeed.