News Sources wrote an interesting post today on
Here’s a quick excerpt
Windows IT Pro
Wi-Fi LAN Settings On Windows 7 LaptopsWindows IT ProQ: The Intel Wi-Fi LAN card in my company's Windows 7 laptops has the option to select between auto 20/40MHz and 20MHz only. What does the auto 20/40MHz setting mean? A: The newer 802.11n radio can use either a 20MHz or a 40MHz channel.
Read the rest of this great post here