When fresh install windows on my ASUS G751JK with ac 7260 , throughput over ac WiFi reached up to 60 MB/s , but i followed the installation steps and installed ASUS recommended driver (17.0.5.8) but unfortunatley i have experienced unavailable WiFi after sleep (disable/enable WiFi helped but was Really annoying ) so i read a lot an found intel 17.14 (17.13 ) driver and problem was solved - BUT speed drop down significantly(it steal says i am connected on 866.7 Mbps but max throughput i can reach (file transfer to my NAS or other PC in the network) is 20 MBps (nearly 3 times lower than before).
Please help what am i doing wrong?
WiFi router is Linksys EA6500 i am connecting on 5 GHz..... as before..