HI Jun M,
Thank you for your reply. I have just got a replacement now it looks better but I'm only getting 100+mbs via wifi. I now use my old router GT AC5300 through wifi I'm getting 500Mbps or sometimes 600Mpbs.
The Asus technical support recommended I not use Aimesh. Although my distance from Zen Wifi TX8 6600 is just less than 4m with no wall block. It seems that Aimesh brings wifi speed to 100+ only. Hardly achieve 200+. I can easily hit 900+ via LAN but not on wifi. Even after this new replacement to both of my Zen Wifi routers and update the firmware to 3.0.0.4.386_43181-g6099e58, it does not help with my wifi speed either.
I'm starting to feel that this could be the limitation of ZEN wifi TX8 AX 6600. I have been an Asus fan and bought even AX11000 this performed as expected.
As long as it can achieve 500mbs within the range of 3-5m is satisfactory. I feel that I waste money purchasing the ZEN Wifi TX8 AX 6600 router as it does not help with the speed even connected to the 5ghz network.
I hope there is a patch from Asus soon.
5ghz connection.