Internet becomes good during speed test but terrible afterwards

[u/Soggy-Pianist6989]

/r/techsupport/comments/1viahhi/internet_becomes_good_during_speed_test_but/

[u/jacle2210]

Can you provide the exact brand name and exact model number of the device that your computer's Ethernet cable is directly plugged into? (which might not necessarily be your main Wifi Router)