I tried the various "solutions" posted here however the only thing that worked for me was using the Windows 7 64 bit driver with N mode disabled. I have an Asus Zenbook UX31A. I tried the following but nothing below worked with the Windows 8 drivers with constant dropouts every 10-30 seconds and ping tests failing.
- Disabling N mode in Driver settings
- Tried both 20MHz and Auto for N-mode band
- Decreased transmit power from maxium to medium in case there is a power issue possibly causing noise problems
- Removed Intel WiFi and Bluetooth software which monitors and tests both interfaces
- Deleting the driver and using Microsoft driver
With Windows 7 driver version 15.3.1.2 located at : ASUS ZENBOOK UX31A - Notebooks & Ultrabooks - ASUS, disabling the 802.11n mode appears to be stable. The connection bars vary frequently between 1 and 5 bars but the connection never drops. I tried walking to corners of my house, which is fairly large and this appears to be stable. My router is a D-Link DIR-655 (B version). I experimented with some settings there but none of them seemed to help. I also ran an overnight ping test to Google and was dropping about 3% of packets, which isn't bad for WiFi.
I don't consider the above a real solution because as others have mentioned, this isn't an 802.11n solution and I'm getting about 10-15Mbps lower than my WAN connection which is close to 25Mbps.
Anyone else that has this working on the ASUS Zenbook, I'm interested to hear what you did to overcome the problems and get things working.