Guys, I have some questions regarding this. (500mbps user here)

Eversince my Unifi got turbo-ed, I have changed my PC from using wifi adapter to full network cable (cat6), then i found out my router got bottleneck-ed at 100mbps (capped). So i went on to get a new cheap router, DIR-842.
I have done speedtest with my phone via 5.0Ghz speed, it can go up to almost 500mbps, but when it comes to PC with cat6, the speed just got stuck at between 120 - 200mbps, while uploading speed is rather stable.

Anyone know what is the issue?

Previously I was using Asus RT-N14UHP, good modem but it doesn't have the gigabit port.
So I changed it to Dlink DIR-842. Speedtest via phone is great, but when it comes to PC, the speed just capped at around 150-200.


Yes I did, It is Killer E2200, so it is 1Gbps

For the ethernet cable, I've got myself a new 30metres cat6, but so far im only using about 20metres, whereas the 10 I actually cable tied it, will it affect the speed like fiber optics too ?