Hello,
I want to use my broadband at full speed (Digi Romania - 1Gbps) i have on speed test download 850-950Mbps and upload 430-480Mbps (via ethernet cable thru RB750Gr3).
Behind this router i bought RB962UiGS-5HacT2HnT to use wireless AC on 5Ghz.
Test speed via wired cable thru RB962 download is 466mbps and upload 480mbps, but via 5Ghz link speed negotiated with my laptop 54Mbps.
I want to improve the speed or maybe i configured something wrong
Here is config on wifi

0 name="wlan1-2,4Ghz" mtu=1500 l2mtu=1600 mac-address=74:4D:28:CC:A6:04 arp=enabled interface-type=Atheros AR9300 mode=ap-bridge
ssid="mkt-CC24" frequency=auto band=2ghz-b/g/n channel-width=20/40mhz-Ce secondary-channel="" scan-list=default
wireless-protocol=802.11 vlan-mode=no-tag vlan-id=1 wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no
bridge-mode=enabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0
hide-ssid=no security-profile=profile 2,4Ghz compression=no

1 name="wlan2-5ghz" mtu=1500 l2mtu=1600 mac-address=74:4D:28:CC:A6:03 arp=enabled interface-type=Atheros AR9888 mode=ap-bridge
ssid="mkt-CC5" frequency=auto band=5ghz-a/n/ac channel-width=20/40/80mhz-Ceee secondary-channel="" scan-list=default
wireless-protocol=802.11 vlan-mode=no-tag vlan-id=1 wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no
bridge-mode=enabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0
hide-ssid=no security-profile=profile 5Ghz compression=no

Thank you
Adrian

If you are connected in only 54 Mbps you are connected in 5GHz A mode! To test speed please use N/AC mode in 5GHz configuration also check security option use only WPA2 PSK, Aes-ccm chippers! Don't use TKIP chippers!