Performance

Have R6300 running in the past couple days and I have notice the following.

When connect on 2.4 Ghz N, my speed varies from 135 MB/s to 270 MB/s even sit next to the router. My last N router was consistently on 270 MB/s.

When connect on 5 Ghz N connections. my speed varies from 150 MB/s to 450 MB/s but it keep change speed as well.

Is there a power setting I can do on the router make sure it has the highest power?

Thanks

Mark