Installing or upgrading the various Intel® Wireless Adapters by end users is not supported by Intel. Intel® Wireless adapter are meant to be installed by computer manufacturers and authorized service providers. In most cases, OEM manufacturers add customizations to the adapters and drivers that may prevent it from working in other systems.
In this case, we recommend you to contact the Computer Manufacturer Support to know which wireless adapters are supported in your system, or you may use the Intel® Dual Band Wireless-AC 7260 + Bluetooth* for Desktop, in stead of a custom integrated adapter.
You may confirm that the adapter and antennas are properly connected, other that that there are no additional recommendations we can provide.
My computer manufacturer is unknown. This PC isn't branded but assembled from components. I don't think adapter has any customizations as it is unbranded one. And it doesn't even have an antenna slot nor the two small cables that usually come in laptops, but I assume that's for power and PCIe has 75w so I also assume it's more than enough. Could there be any setting in BIOS for PCIexpress slots that I don't know about? My BIOS had a reset recently and some settings weren't back like they used to be.
As I mentioned, we do not support this type of integrations, since we cannot guarantee that the adapter will work with an adapter in a system that may not be compatible with it. In our best effort, we would like to provide some feedback about adapter installation:
- The power and data connections between the PC and the wireless card is done via the PCIe slot. Cables are not needed for this.
- The Intel® PRO/Wireless 3945ABG Network Connection requires 2 antennas to work correctly. These would normally be the 2 cables that are in the Laptop chassis, they connect to the round connectors labeled 1 and 2 in the adapter. Wireless connections cannot be established if the antennas are not seated properly.