I personally got my speedtest result to increase from 1,5Mbps to 40Mbps just from changing from channel 1 to channel 4 (neighbors wifi were located at channel 4 for whole duration, device only supports 1ss at 20Mhz - 72Mbps theoretical). Wifi networks on the same channel do play nicely with one anouther while they are pure interference to one Les chiffres 2.4 GHz et 5 GHz font références à deux bandes de fréquences que votre Wi-Fi peut utiliser pour son signal. La fréquence 2.4 GHz est une fréquence UHF, Ultra Hautes Fréquences, et la fréquence 5 Ghz est une fréquence SHF, Super Hautes Fréquences. Ces deux fréquences possèdent des avantages et des inconvénients, le choix de l'une ou de l'autre dépend de vos usages. Your (dual-band) wireless router operates between a range of wireless frequencies — roughly 2400MHz to 2500MHz (for your 2.4GHz network), as well as 5200MHz to 5800MHz (for your 5GHz network For 40 Mhz broadcasting with 2.4 Ghz. The best channel band to use are 3, 11. For 20 Mhz broadcasting with 5 Ghz. For 40 Mhz broadcasting with 2.4 Ghz. Does it matter what channel my WiFi is on? Selecting the proper Wi-Fi channel can significantly improve your Wi-Fi coverage and performance. The lower and upper frequency of 2.4 GHz band is 2400 MHz and the upper frequency is 2500 MHz. There are fourteen channels in this frequency spectrum. The 802.11 Wi-Fi standards specify a bandwidth of 22 MHz for each channel but often nominal figures of 20 MHz is given for the Wi-Fi channels and channels are on a 5 MHz incremental. The 20 / 22 In WIFI, what is channel bandwidth? The 2.4 GHz frequency has a channel width of 20 MHz by default. The width of a 20MHz channel is wide enough to cover only one channel. As a result, a 40 MHz channel width bonds two 20 MHz channels together to form a 40 MHz channel width, allowing for greater speed and faster transfer rates. @Coldimor wrote:. I was changing some wifi settings yesterday and did a wifi analyics test from the microsoft store it was saying my 5ghz was at 20mhz bandwidth wrote: So in your opinion it will be better or best practice to use 40MHz channels with 5GHz only correct? I would prioritize 40 Mhz channel width, HOWEVER, this will depend on the worst wireless client. If there is a wireless client that won't talk in 40 Mhz then crank down to 20 Mhz. wrote So I read that the 5 GHz frequency (in the EU) can have 19 channels without overlapping. The 5 GHz frequency goes in the EU from 5.150 to 5.725 GHz, so total 575 MHz. The width of one channel is 20 MHz. 575 MHz / 20 MHz = 28,75 ~ 28 Channel. so the WLC can dynamically chose the 20MHz channel or select 2x20MHz channels to form a 40MHz channel set. clients are assigned 20 or 40 MHz channel on request. so most likely on the AP's involved there are NO clients that are 40MHz capable or have requested 40MHz bandwith. By the way. 802.11ac allows per-frame channel width and bandwidth ciZxjB2.