On the Device Manager window, click Network Adapters. Look for the name of your wireless adapter and check if it shows ABGN or AGN . In this example, the wireless adapter is Intel® WiFi Link 5300 AGN. This means that the computer has the 5 GHz network band capability.
Read moreHow do I know if my network is 2.4 GHz or 5GHz?
Steps are as follows.
Read more