My ISP just upgraded my 100Mbps connection to 500Mbps. They also upgraded my router from TP-Link Archer C20 (supports only 100Mbps) to TP-Link Archer C1200 (supports up to 1Gbps). My desktop is on wired connection via a 30m CAT5e cable. However, when I do speed test, I'm only getting 100mbps...