3 Networks showing on one wireless adapter and only 1 on another

What is the model number and type of your PCI wireless card? If it's an older card and your other routers are newer, or don't have a compatible standard like wireless G enabled, then it might not be able to pick up those network signals. You USB adapter may be newer, and compatible with wireless N or AC while the PCI card might not, if it's an older card.
 

Fred D

Reputable
Aug 12, 2015
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4,510
The model number is ES-LW04-A2 allowing 11b, 11g, and 11n. The router I can connect both to is a belkin N150, and the one I'm trying to connect to is AT&T's WIFI modem. I was able to see all available networks when I put the PCI card into another desktop. Does it have anything to do with the computer recognising it as "Wireless Connection 3"?
 
Why do you have three different wireless networks? There should be an option, unless one or another of those is very old, to allow them allow to be shown as a single network. It's probably going to require two of them to be assigned in repeater mode or something similar and they would all need to be in range of each other. I'm really not sure why the adapter would work with the same router in one machine but not another unless they have different operating systems and the adapter is being configured differently by default in one than it is in the other, or, one machine has newer drivers than the other.

I'd start by making sure the intended machine has the very latest available drivers.
 

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