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thinkpad t430s+intel 6205无线网卡连接小米路由器的5g wifi，速度只有150Mb，离了点距离，实际传输速度只有4MB左右，连接另一台水星4530r无线路由器的5g wifi也一样的速度。

另外有一块tp-link tl-wdn3321的双频usb无线网卡，插上能自带识别，选择连接5g wifi速度非常给力，9MB左右。

怎么破？？

tp无线网卡：
tong@T430s:~$ iperf -c 192.168.0.204 -i1
------------------------------------------------------------
Client connecting to 192.168.0.204, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.31.152 port 41519 connected with 192.168.0.204 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 9.38 MBytes 78.6 Mbits/sec
[ 3] 1.0- 2.0 sec 9.00 MBytes 75.5 Mbits/sec
[ 3] 2.0- 3.0 sec 9.62 MBytes 80.7 Mbits/sec
[ 3] 3.0- 4.0 sec 9.25 MBytes 77.6 Mbits/sec
[ 3] 4.0- 5.0 sec 8.75 MBytes 73.4 Mbits/sec
[ 3] 5.0- 6.0 sec 9.12 MBytes 76.5 Mbits/sec
[ 3] 6.0- 7.0 sec 9.50 MBytes 79.7 Mbits/sec
[ 3] 7.0- 8.0 sec 9.88 MBytes 82.8 Mbits/sec
[ 3] 8.0- 9.0 sec 9.50 MBytes 79.7 Mbits/sec
[ 3] 9.0-10.0 sec 9.75 MBytes 81.8 Mbits/sec
[ 3] 0.0-10.0 sec 93.9 MBytes 78.5 Mbits/sec
tong@T430s:~$
tong@T430s:~$ iwconfig wlan1
wlan1 IEEE 802.11abgn ESSID:"Xiaomi_Wafer_5G"
Mode:Managed Frequency:5.745 GHz Access Point: 8C:BE:BE:20:3C:3E
Bit Rate=240 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=50/70 Signal level=-60 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:1102 Missed beacon:0


内置的intel 6205：
tong@T430s:~$ iperf -c 192.168.0.204 -i1
------------------------------------------------------------
Client connecting to 192.168.0.204, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.31.244 port 45663 connected with 192.168.0.204 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 3.25 MBytes 27.3 Mbits/sec
[ 3] 1.0- 2.0 sec 3.25 MBytes 27.3 Mbits/sec
[ 3] 2.0- 3.0 sec 3.12 MBytes 26.2 Mbits/sec
[ 3] 3.0- 4.0 sec 3.12 MBytes 26.2 Mbits/sec
[ 3] 4.0- 5.0 sec 3.12 MBytes 26.2 Mbits/sec
[ 3] 5.0- 6.0 sec 3.12 MBytes 26.2 Mbits/sec
[ 3] 6.0- 7.0 sec 3.00 MBytes 25.2 Mbits/sec
[ 3] 7.0- 8.0 sec 3.25 MBytes 27.3 Mbits/sec
[ 3] 8.0- 9.0 sec 3.25 MBytes 27.3 Mbits/sec
[ 3] 9.0-10.0 sec 3.25 MBytes 27.3 Mbits/sec
[ 3] 0.0-10.1 sec 31.9 MBytes 26.6 Mbits/sec
tong@T430s:~$ iwconfig wlan0
wlan0 IEEE 802.11abgn ESSID:"Xiaomi_Wafer_5G"
Mode:Managed Frequency:5.745 GHz Access Point: 8C:BE:BE:20:3C:3E
Bit Rate=135 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=54/70 Signal level=-56 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:205 Missed beacon:0

据说是因为intel 6205的firmware问题，windows下有正常驱动，速度可以到13MB左右，linux下就只有3MB左右了。蛋疼！

t430s

1. http://shop.lenovo.com/us/en/laptops/th ... tech_specs
WIMAX/WIFI
Intel Centrino Advanced-N 6205 AGN
Intel Centrino Ultimate-N 6300 AGN

2. https://downloadcenter.intel.com/search ... WiMAX+6250