Trying to install ar5b125

i have a wireless card ar5b125 i installed in my computer.
it picks up the the card but only 2.4. how do i install the driver for this card?

I have done a quick search and only found an 8year old item from Ask Ubuntu. Atheros ar5b125 Wireless Driver - Ask Ubuntu

Others on here may have a better idea.

I wonder if this discussion, which seems similar to your issue, may be helpful:

That frequency is on a channel that my wireless network adapter doesn’t have (it only supports 2.4GHz) and that my router network doesn’t occupy.
Checked the frequency channel of my router, which was Channel 7 (~2.4GHz) and I ran (some) commands…
And it worked.