I suggest you to take a look at the following links, that show some recommendations in regards the wifi performance:
How do I improve my 802.11n wireless performance?
http://www.intel.com/support/wireless/wlan/4965agn/sb/CS-028449.htm?wapkw=1030+5ghz
Why am I not able to connect at 300Mbps with my 802.11n device?
www.intel.com/support/wireless/wlan/sb/CS-030282.htm?wapkw=1030+5ghz
You can try also to update the firmware of your router and see if that help and the latest drivers at the intel wifi adapters as well.
I hope this recommendations help you.
Thanks for the answer.
I checked the settings and with the same settings 13.04 driver version gets 300 Mbps, while 14.03 can't reach over 130 Mbps. I have:
802.11n Channel Width (band 2.4/band 5.8) - auto (not limited to 20 MHz)
802.11n Mode - default (on)
Ad Hoc QoS Mode - default (WMM on)
Fat Channel Intolerant - default (off)
Mixed Mode Protection - default (CTS on)
other settings (mobility agressivness, adhoc channel, power management) are default but they don't seem to have any meaning for transmission rate.
Edit:
But after I updated firmware in the router it seems I can get 300 Mbps with new driver. So thanks again, my problem seems solved.
