Ok, so the old card was screwed down on one corner. The new card (half size) has no where to screw down. Does the new card need to be connected to where the old card screwed down. I'm having problems maintaining a stable connection. Everything's fine one minute, and then I loose my connection. Have downloaded the latest firmware for the router and the driver
from Intel. Set the adapter to 2.4ghz preferred frequency as I think the router only does 2.4ghz. Also set the adapter to 20mhz width even though the router supports 40mhz, and set the router to 20mhz. Connection remains stable for longer but in the end I still need to reset the adapter. The new AC card is much faster so I want to keep it. Also now LAN doesn't connect or even register on the router. Any ideas? Whenever I run diagnostics it says default gateway was not available. *** pulled new card and replaced with old one. LAN is working again and WLAN working fine. AC chip was quite warm?