Does 2.1.3.4 restrict Satellite performance?

I contacted Netgear support. As adviced by him, I did factory reset on Satellite and re-synced, still the same problem.

Then I downgraded to v2.0.1.4 on both Router and Satellite, I got 600+Mbps speedtest result again.

So it is definitely the limitation brought by one of the firmware after v2.0.1.4.

I telnet to Router and disabled firmware auto-upgrade by updating orbi_auto_upgrade, auto_check_for_upgrade and auto_update, committed the changes back to nvram. I hope this trick still works.

To summarise, after installed one of firmware after v2.0.1.4 (I tried v2.1.3.4), Satellite (RBS50) performance dropped significantly:

1. Single thread by speedtest.net. Download result < 450Mbps. (vs >600Mbps on v2.0.1.4)

2. Multi-threads by download manager such as iGetter. Start 10 downloads at the same time, each download has 10 segments, total concurrent 100 HTTP sessions. Total download speed 19-20MB/s. (vs 36-40MB/s on v2.0.1.4)

3. FTP upload to local NAS. Upload speed 7-8MB/s. (vs 12-14MB/s on 2.0.1.4)

It looks like Orbi Satellite reduces transmit power when volume reaches certain threshold? I strongly feel this is caused by the fix of "Fixed high CPU when Orbi is in AP mode".