On 21/01/2021 15:24, The Natural Philosopher wrote:
> For reasons not pertinent to PIs, I started researching wifi
> performance, and would like the assembled multitudes to comment on the
> correctness, or otherwise of what I have found.
>
> - All Pis with built-in Wifi use the Broadcomm chip
> - This chip is not capable of 5Ghz connectivity
> - Nor is it capable of 40Mhz dual channel operation
> - ergo it *cannot* connect at *more* than 72Mbps

The Pi 3B+ and 4B have 5 GHz WiFi. I think the chips support 40MHz on
2.4GHz, but the driver doesn't.

All my 3B+s and 4Bs have Ethernet, so I can't check on the 5GHz
performance, but the 3Bs and Zeros scattered around the house do about
20-30Mbps up and down, as do the 2Bs with USB WiFi adaptors.

Just failed over a 4B on to 5GHz WiFi, its fairly close to the router
but only gives 88.6Mbs down, and 75.3 Mbs up.

So I recommend if you need speed, use Ethernet. Up to the 3B you should
get 96/92Mbps, the 3B+ does 327/270Mbs, and the 937/832MBps down/up.

---druck

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