I have a digi gigabit internet connection and using wifi 5 Ghz, the download speed is very slow, approximatelly 200 Mbps but the upload speed is the given maximum 300 Mbps. The router settings: Mode:

Model : Hardware Version : Firmware Version : ISP : I installed an Archer C50 on my new fiber connection. Although everything seemed to work fine, I started a speed test. Results are stunning: 15Mbps