Question Internet speed tests show great connection but everything else is slow

Mar 23, 2020
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Im using xfynity, up to 100mb down, and getting around 80mbs on speed tests. But downloading a game i'm getting <1mb. Scrubbing youtube only pulls about 4mb and is slow and unresponsive. Multiplayer gaming is near unplayable. I have tried multiple resets, ethernet and wifi to no avail.

i noticed when i start my game download it will pull up to 50mbs but then quickly drop to sub 1mbs speeds. Is there anything i can do, or am i at the mercy of xfynity? Thanks!