My onboard WiFi Realtek 8852BE on the ROCK5B+ seems to be not very fast

I used iperf3 for the speed test. Onboard WiFi Realtek 8852BE seems to be not very fast.

Under the same conditions, the ROCK5B using an external Realtek 8852BE has about three times the speed.

Currently, I’m using the antenna that came with the radxa. Tomorrow, I’ll try changing the antenna, although I don’t think it will make much of a difference.

I changed the antenna, and the speed improved somewhat.

How far away are you from the router? What is the wireless spec of the router? What speed are you connecting at?