I pay for a 50Mbit/s connection. When I connect modem from ISP directly to my PC, the speed is OK. But since we share this connection, I have to use router.
It's nothing archaic,
TP-LINK TL-R402M, but when I connect modem to this router, and then PC to router the speed drops to 10Mbit/s (even when noone else is connected).
I have absolutely no idea what causes this, I tried replacing a cable, even borrowed a router to try it with it, but it still acts the same.