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Forum Discussion
RAX120 - Much slower speeds with AX enabled using an iPhone 11 Pro
So the iPhone is the first and the only Wi-Fi 6 client I have, and right now the wifi speeds are much slower with AX enabled (I'm on firmware V1.0.1.90). AX enabled: Link speed: 1201 Mbps, Down:...
I've downgraded the firmware to V1.0.0.84 and now the speeds are much better. I'm getting 726 Mbps down and 600 Mbps up. However, the link rate seems to never reach the theoretical max of 1201 Mbps. Instead it's stuck at 1020 Mbps.
Seems like it's stuck at 1020 Mbps because that's the max link rate with 80mhz channel, 1024-QAM, 3200ns guard interval. I've seen the link rate dropping down to 918 Mbps, 816 Mbps, 735 Mbps. 612 Mbps and these are all link rates with 3200ns guard interval. Before downgrading the firmware I could achieve 1201 Mbps as that's the max link rate with 800ns guard interval.
Now the question is: why is the guard interval 800ns on V1.0.1.90, and 3200ns on V1.0.0.84? The phone is losing 15% throughput because of this.