You mean the wireless network card? 100Mbps and 300Mbps refer to the maximum transmission rate of the network card, and its download speed is affected by many factors such as the internet access mode, wireless network environment, computer itself and so on. Regardless of other factors, you use a wireless network card to connect to the wireless router. The maximum data transmission of 100Mbps is 12.5M/ s, while the maximum data transmission of 300Mbps is 37.5m/s. ..