I just received one ac68u from China yesterday. The seller said it's a US unit. It's been working great so far, good range and responsiveness, blows the 850L out of the water no doubt.
But I'm having some issue with the 5GHz channel. The problem is :
1) the available channel is only up to 140 ( I know there are still some channels available beyond that).
2) my pce-ac68 (local unit) can't detect the 5GHz band when channels set above 48. (means 100 and above it just can't detect at all).
Other than that, it works fine with my other devices like my iPhone and MBP. Can detect the 5GHz band regardless what channel I choose.
So far I've tried rolling back the driver on the pce-ac68 to older versions, both EU specific and non-EU versions. Doesn't help at all.
The router is on latest Asus firmware Version 3.0.0.4.384.45717.
Can anyone shine a light on this?
*I don't want to post this in the official Asus networking thread as my router is not bought locally.
I don't own ac68u but an ac86u with merlin firmware. You can try to change the region to Asia/ US/ Australia. Wireless > Professional > Region.
Changing the region in professional settings wouldn't change transmit power, that only change the available channels.