@FelipeDuarte QoS did not fix my issue on the same firmware. Amazon wanted me to try a new unit and the one thing I did differently during setup was leaving the unit on 1.0.7 Build 20200212 rel.7095(5553). In doing so the Internet speed is now closely matching the one from ISP of 1Gb (800-950 in reality).

@ID1 Cool, sup good speed. Here I have 300MB, but I don't tried it with the heavy speed how your isp speed.
If you want, I can send for you my configuration to compare with yours.
Maybe the information help you to your analysis.

@ID1 Thanks for sharing this.  I was holding off upgrading the firmware, partly because I forgot about it.  But now, I'll just leave it at 1.0.7 Build 20200212 rel.7095(5553).  I'll wait to see if they offer a new one before upgrading.  Although my ISP connection is only 50 mbps down, I want to wait until I hear good things before upgrading the firmware.  :)

ID1 wrote

@FelipeDuarte QoS did not fix my issue on the same firmware. Amazon wanted me to try a new unit and the one thing I did differently during setup was leaving the unit on 1.0.7 Build 20200212 rel.7095(5553). In doing so the Internet speed is now closely matching the one from ISP of 1Gb (800-950 in reality).

@Cali88 

Was your issues resolved by staying with the default version of Firmware?  I have 100Mbps and can get that when I am connected to modem or my old Netgear R8000P, but when I connect to the AX6000 my speeds drops to 60Mbps and uploads drop to 6/7 out of a possible 11Mbps

@Cali88 

Was your issues resolved by staying with the default version of Firmware?  I have 100Mbps and can get that when I am connected to modem or my old Netgear R8000P, but when I connect to the AX6000 my speeds drops to 60Mbps and uploads drop to 6/7 out of a possible 11Mbps

@Uprvrndn No it didn't. Must be a hardware issue. Return if u still can

@Cali88 

No solutions for that yet? I'm getting slow download speeds on wifi6 even with the new firmware (released this month).

@RodrigoEA 

I just got upgraded to 1gig from 300mbps and ran into this issue and spent over 2 hours with the ISP support who didnt help at all. The fix that worked for me was going to Advanced > QOS > Application Priority and then clcik on the "Total Bandwidth"  right at the top and set it to Manual. I used 1024 for both up and down for my 1Gig connection. Setting higher seem to have slowed it down but it could have just been the speed test site as I didnt dig too much deeper after I got it working. I am on the 1.1.1 firmware and didnt upgrade as I saw some issues on the forums, I can wait...

@KingTitan Thanks for the tip about the bandwidth limits, I just bumped them both up to about double what the speed test says.

I was having a ton of problems up to the point that even my wired connection was dropping out. It has been better since I upgraded the firmware I think. I really don't know as I have tried so many different things but you might update the firmware again if there are issues. They just release another update.

@Cali8 Hi guys, sorry for delay to share my experience.

Really, the bandwidth problem solved the speed.

My problem now is to synchronize the extenders (2x RE450) and keep the network running.

My Network Schema:

Personal ISP Modem (Without wifi) -> Principal Router AX6000 -> Daughters Bedroom 1xRE450 -> Office Room 1x450

Many times the chromecasts or samsung tvs down of synchronism of lan/network and i need to power off energy to re-sync work again.

This is the result of speedtest-cli on linux using my wifi 5G:

Hosted by Portal Quéops (Piracicaba) [157.61 km]: 14.442 ms
Testing download speed................................................................................
Download: 153.34 Mbit/s
Testing upload speed......................................................................................................
Upload: 116.19 Mbit/s

The competition with this test are: 5G + 4G Wifi: 2 TVs playing film on Disney + 2 smartphones watching youtube, whatsapp, facebook, instagram 1 Notebook Ethernet: 4 RockPI4 cluster 1 Rock64 Pro 1 Xeon Dual Server

I upgraded to version 1.2.1 Build 20210205 rel.12759 (5553), I hope this improves the crashes between tvs and extenders.
For the extenders I had to create a separate connection with another name to make it more stable.

Well let's talk, but apparently the product has its problems and I think it's related to the firmware and not its hardware.

They are answering most of the time, but we will help each other with information.

Hugs friends.