You should update to the latest firmware and see if the issue is fixed.

@AustinGreyson That's still 1 minute too long. Instantaneous transfer is the aim here, otherwise there won't be innovation.

@Mmiii The link to the 1.3.1 beta firmware is here Archer C6(EU)_V2_200507_beta.zip. Beware that this is a beta firmware and there will be a watermark saying so all over the settings page. I noticed...

Another update, looks the the problem was due to the router firmware. Version 1.3.0 was buggy and once I updated it to 1.3.1 beta the issue is no longer there.

I did some further testing. On my Archer C6 V2.0 (EU) router, when I set the 5 GHz bandwidth to 40 MHz, connection is stable but I am only able to get ~160 mbps. When I change it back to 80 MHz, I am...

I'm having the same issue too.