SXT AC 20Mhz throughput

I’m not sure if this has been posted yet or not but what should the expected throughput be on a 20Mhz channel with an AC link? I have been testing in a low noise environment and getting numbers lower than I expected. I am using 2 sxt ac units and getting about 70Mbps throughput on a short los link.

I’m getting 122mbps tcp at -30dbm signal and high noise area. Connection rate is 173.3mbps and ccq 99%