I've tried a WLE1216V5-20-I and WLE1216V2-20 on the full length mpcie slot on this board: https://www.asus.com/us/Motherboards/Q87TCSM/
It doesn't seem to be detected at all. no ath kernel logs. Im not sure if this slot even supports it.
What board should I use these Compex cards with?
Did you solve your problem because I have the same with board espressobin v7?