Thick walls

I'm currently using an Amplifi wireless router with 2 mesh points. From 10 feet away, with two walls between (doorways), my connection drops from 460 download to 30 download. This is with the mesh points. Looking for any suggestions/recommendations on a whole house system that can go through...

i have ga-z77x-ud3h mb 2x sli evga 970's i7-3770k 16 GB ram brand new 900w 4 24v rail pcu and averaging approx 45 fps in gta V with settings suggested by geforce experience, which is all max except some scaling i believe. however, i am seeing people with single 970's reporting better bench's...