Dell Inspiron 17R SE
Windows 7 SP1 x64
PROSet 17.1.0 (driver 17.1.0.19)
I have a 7260AC adapter in my laptop connected to a Virgin Super Hub 2ac via the 5GHz band @ 300Mbit and has "excellent" signal strength according to Windows. However when I run a speed test via speedtest.net using a local server (hosted by Virgin Media), I am getting a solid 40Mbit down and 6Mbit up, even though I have a 100Mbit service! If I run the same speed test using my iPhone 5 (also connected via the 5GHz band), the results are 95Mbit down and 6Mbit up.
Why is my iPhone 5 faster than the wireless adapter in my laptop despite having a connection speed of 300Mbit and excellent signal strength? I have even tried running the speed test while the laptop is next to the router but it's no different - seems to be capped at 40Mbit down.
Since installing the 7260AC I have also noticed the laptop will lose Internet access at random. I don't have any power saving settings enabled and have tried disabling Speed Step but to no avail. The only way to restore the Internet connection is to reboot the laptop. Disabling/enabling the adapter causes Windows to crash; it has to be rebooted!
Why is this happening? Is this card not compatible with my laptop? Any suggestions?