I have two PCs with PCI wifi cards based on RT2760 802.11n chips, and latest revision and firmware of DIR-615. Wifi connectivity is very unreliable, throughput is not constant and sometimes PCs suddently drop out of the wifi.
All other devices (laptops, USB wifi sticks, smart phones) work perfectly with my DIR-615. Are there any settings I could try to change? Switching to g mode did not help.