Internet Speed Slow Only On One Computer
I've recently upgraded to AT&T 300 Mbps and I did get what I bargained for most of the devices in my household. Wifi getting around 250-300 and ethernet getting 300+. I have good speed on every device except for one, my personal computer, I'm currently connected through ethernet (cat5e), and I can barely get 100 Mbps. I thought it had to do with the range, but I tested the speed using my phone at the location of my computer which got ~260 Mbps, but my wired connection only gets 90-100.
P.S. : My computer is the only one on windows 10, I'm not sure if that could be a factor.
Edit : I think it has to do with the cable, I've just checked my ethernet speed and it's capped at 100.0 Mbps, while my other pc has 1.0 Gbps, should I upgrade to a cat6 because my personal PC is decently far away from my modem.