Hi everyone, I have a new Lenovo X240 with a Intel Dual Band AC 7260 adapter,
Originally X240 comes with driver version 188.8.131.52, I have test it in a wireless shielding room with D-link DIR-868L (which uses a broadcom chip)
And use Ixia software for throughput testing, the speed is fine with this version (link rate:866Mbps, real speed: 400~500Mbps),
However, after I upgrade the AC7260 driver to 184.108.40.206, in the same environment the realwindows_8 speed can only reach about 100Mbps (link rate still shows 866Mbps).
then I roll back the driver, speed comes to 400~500Mbps again.
I have tried using other 802.11ac adapters with the D-Link router, all speed are fine, so what's wrong with my AC7260 and driver 220.127.116.11?
Any idea how to solve this?
Thanks in advance!
PS I tested in both Windows 8 and Windows 8.1
It's the drivers. I also get much lower throughput for my 7260N with 18.104.22.168. I rolled back to 22.214.171.124 and everything is fine. I don't even get that much disconnects and speed drops to 2 - 11 Mbps with 5 GHz band completely not functioning. I still do get them around once a week when connected to 2.4 GHz band. I never had this problem though when connected at the 5 GHz band.
The 126.96.36.199 is the best driver for both bands. 188.8.131.52 is the best one for stability at 2.4 GHz but is horrible at 5 GHz band.