The maximum speed of 1200Mbps WiFi adapter can reach 867Mbps at 5G frequency range, and 300Mbps at 2.4G frequency range.In normal situations, PC network speed cannot reach the speed of the Wi-Fi adapter. This will vary depending on the size of the internal memory on the network, router, barrier, laptop, or PC.If you want to watch videos or play online games quickly, we recommend connecting it to the 5G frequency range. If the WiFi adapter is far away from the router and you just need to access the website, it is recommended to connect to the 2.4G frequency range.At this time, the signal of the 2.4G frequency band is more stable.If the Wi-Fi adapter suddenly stops working, please unplug the Wi-Fi adapter and plug it back and then reinstall the driver manually. If the connection is unstable, please check the signal strength and signal channel.