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I've found wireless adapter does not support 5GHz

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Weaver:
You’re absolutely right about the 2.4GHz vs 5GHz decision criteria. While you are in a very clean environment ,the range and penetration of 2.4GHz might be a plus depending on your circumstances. You can possibly use either the pair of 1+6 or 6+11 = 2 x 20MHz = a 40MHz width channel to get double speed. That means bring a bit of a bandwidth hog in 2.4GHz and there would then only be one 20MHz-wide channel left free after you have grabbed the rest. Fine in the right circumstances, but anti-social and, as you say, might very well not be sustainable if you end up with more neighbours.

Being in 5GHz-land means you can immediately use at least 2x20MHz=a 40 MHz channel and with more recent kit 80 and even 160MHz are possible in the right circumstances (I would think at least twice about it). That is the other big advantage of 5GHz, apart from availability of many channels and freedom from competition and interference, in my view: that you are immediately certain to be able to use double speed with no problem.

So you’re doing the right thing.

parkdale:
Renluop are you referring to the Aerials inside the laptop? normally with 2.4Ghz adapters there will only be 2, some 2.4/5Ghz can have 3.
I replaced my wireless card on my Dell with a dual band one and it only uses 2 Aerials.

renluop:
Subject is of remote interest to me now. Anyhow I have a desktop; wife only an IPad, and laptops only enter our house when family come.

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