its my second post here and my first one pulled out without any warning so..

long story short ı have ax55 ax3000 router it doesnt give me a consistent speed to my pc

my net speed test reveals ı get 2~~14mbps for about 2 sec then ıt goes down to 72~~660 kbps ı dont know why ı did send my unit to local tech support but it didnt fix it what do ı do ?

my ısp isnt a problem my pc isnt the problem just this router seems to doesnt want to work on my pc?