If you computer came with this adapter installed we recommend that you continue using the drivers provided by ASUS as they may contain additional features.
As a suggestion, you can disable the option that says: " Allow the computer to turn off this device to save power." It might solve your issue using the OEM (Original Equipment Manufacturer) drivers. Below are the steps:
1 - Access Device Manager.
2 - Select Networking.
3 - Select the Intel® Dual Band Wireless-AC 7260
4 - Right click on it, and from the options, select the one that says Properties.
5 - When the dialog box pops up, go to the tab that says Power Management and from there, uncheck " Allow the computer to turn off this device to save power."
*If you are using the driver version 17.14... That option should be checked.
6 - You can also enable the WMM by selecting the tab the says Advanced, from the options found in properties, select the Ad Hoc QoS Mode and then disable uAPSD.
Let us know if this information helped you.
Thank You aleki_intel,
I did (several times ) what You suggest - uninstalled latest intel driver and re installed (same intel 17.0.5 .8 provided by ASUS), Your suggestions might be (steal testing) solved sleep problem (Thank You), but speed is steal the same ~20 MB/s and i cant reach previous levels (also suggested by announced speed of connection 866.7 Mb/s) and this is what drives me crazy .
I am truing to rid of cables and installed several ac WiFi AP's around my house and i need higher speed because i do frequent backups on my NAS and transfer some big files to other PC's.
If You can give a suggestion what can be wrong to to have such n like speeds instead of ac???
I cant remember (did not looked) what driver version i had when i'v got 60 MB/s
Please check this link: Wireless Networking — What are the Recommended Settings for 802.11n Connectivity? as it may help to increase your speeds. Also make sure that the band is selected to auto or No preference. Also in the same advanced tap, set the first two options to auto as shown in the picture below.
Let us know if this helped you.