The wireless network card is actually a very useful thing.
There are 2 main roles:
1. When you are not convenient at home, it can make your desktop also have the ability to connect wireless Internet access.
2, replace the low-performance network card with your notebook, let your notebook get a better network speed, get a lower network delay when playing games.
Let's talk about how to buy a high-performance wireless network card.
First, select the interface type of the wireless network card.
Wireless network card is divided into: USB wireless network card and PCI-E wireless network card

The PCI-E network card is inserted on the motherboard of the desktop, which is the PCI-E slot of the graphics card. In theory, the PCI-E interface is directly connected to the CPU, so it is better than the USB network card on the network transmission speed and delay.
But the installation location of this network card is generally on the back of the desktop, that is, the network cable, the display line there, the signal reception position is not very good. There are also versions of extended lines, but prices are more expensive. Generally, high-performance wireless network cards are in this interface.
The USB interface is mainly convenient, desktop, notebooks can be used, and the price is relatively cheaper, but there is no special high-end model. If the requirements for the network are not too high, you can choose USB. It is recommended to select a USB3.0 interface network card (USB port is typically blue).

Select the appropriate rate according to your wireless router.
There is a technology called MIMO, which uses the plurality of antennas of the router to transmit data at the same time, in order to increase the speed of the router WiFi, take 5GWIF, the antenna on the router represents 433Mbps, two antennas ( A shortty of 2 × 2mimo) is 433 × 2 = 866Mbps, the more the antenna, the larger the rate, but it has a limit, that is, your wireless network card must have the same number of antennas (including built-in hidden antennas) Match the rate of the router.
So when you purchase a wireless graphics card, it is best to check your router to check your router is a few × a few MIMO, and then you should pay attention to the NIC when you choose the wireless network card. The network is a few × a few MIMO.
For example, your router is a 1200M wireless router. It is a 5.0g rate of 300M 2.4G rate + 866, so its 5GWIFI is 2 × 2mimo of 433m + 433m. When picking wireless network card, you should pick 5G rate of 866m 2 × 2mimo wireless network card, so The choice is the most appropriate.

Reference: https://www.utmel.com/blog/categories/wireless/what-is-a-wireless-n...