Wifi speed vs Xbox speed

I take it you're WiFi on both your PC and XB1X and you used a diagnostic speed test site. Biggest problem is with majority of these tools, is the fact they are server side and test speeds to your gateway/router/modem and not your home WiFi network. Theoretical
speeds are exactly that, actual WiFi speeds tend to be lower. The reality is, you could be getting 120mbps into your home but WiFi is putting out 60mps.

I've added a wifi booster in the problem room. Even with 100% wifi signal, the download speed was terrible (0.01 mbps). I've connected the xbox one to the wifi repeater via an ethernet cable and the problems seem to have cleared (download speed of 13.9
mbps). Has the wifi card in the xbox started to go bad?

@Daitheflu916

Have you tried changing the wifi channel?

Also what wifi band are you using?

If you are using the standard 2.4Ghz band then wifi can be so congested that it's impossible to get a decent speed. Although changing the wifi channel can help. For instance I get a massive speed drop if I am using wifi channel 1 but if I switch to channel
11 the speed doubles.

If you have a dual band AC router though then try connecting to the 5Ghz band.

I got a massive speed boost when I did that. With 2.4Ghz I was lucky to get speeds above 10Mbps. Now I get the full speed of my line which is 75megs.

to add also, your wifi and lan speeds are not indicative of the speeds you connect to the internet, it is the actual broadband speed your have that you need to confirm.

I think it has something to do with your wifi upload speed, maybe check how fast your upload speed is. Strangely for example if i use my 4G hotspot my clips don’t lag but as soon as i clip stuff on my wifi it does. This is because the upload speed of my wifi is terrible apparently...