Seem like restarting and channel 36 boosted it up to 380mbps. Still... where is my missing at least 200mbps...
Keep in mind that wifi is a shared medium. The actual throughput will be influenced by a number of factors:
- The link rate (throughput will typically be around 50-75% of the link rate)
- Who else on your LAN is also using Wifi at the same time
- Which of your neighbours are using wifi on the same or a neighbour channel
- What interference sources exist in the same radio band as your wifi