Download speeds are 300-500 Mbs. Upload speeds are anywhere between 100-240Mbs I did mentioned i already did a factory reset and the qos settings.

@Kevin_Z having same or similar issue. The only time i ever see this burst speed that may go over 400Mbs is if it's lucky enough to run a speed test from the router ISP: Xfinity Package: 1.2Gbs...