Dear customer,

We are sorry for the inconvenience. The wireless performance is also decided by your wireless adapter. May I know the link speed on your adapter when it's connected to our router? Normally if you want to get more than 300Mbps on wireless, I think the link speed should be 867mbps. You can also tell me the model number of your wireless adapter so that we can help you to check the specification of your wireless adapter.

You can refer this link to check the link speed:https://www.tp-link.com/en/support/faq/2265/

About the actual speed and link speed, there is a relationship between them. You can learn it from our topic: https://community.tp-link.com/us/home/stories/detail/381

Please let me know if I can be of any further help. Looking forward your reply.

Mr_Whatsittoya wrote

I just switched ISPs from AT&T to Comcast.  The fastest service I could get with AT&T was 24Mbps and now I'm averaging 900+Mbps with Comcast (both tested with a PC connected directly to the Archer C5400X and using the router's built-in speed test feature).

 

With AT&T, the Archer C5400X's WAN port was connected to one of the Ethernet ports on the AT&T gateway.  Now with Comcast, the C5400X's WAN port is connected to one of my cable modem's Ethernet ports.  The cable modem is my own (Netgear Nighthawk CM1150V) that I just recently purchased for the change in ISPs.

 

All wireless clients connected to the Archer C5400X were previously able to match AT&T's broadband connection of 24Mbps max.  However, now those wireless clients are topping out around 150-200Mbps while Comcast's broadband connection is at 900+Mbps.

 

No changes were made in the Archer's WiFi settings which are:

 

2.4GHz Channel

• Security:  WPA/WPA2-Personal
• Version:  WPA2-PSK
• Encryption:  AES
• Mode:  802.11b/g/n mixed
• Channel Width:  Auto (current 40MHz)
• Channel:  Auto (current channel 3)
• Transmit Power:  High
• Airtime Fairness:  Enabled (no change in performance when disabled)

 

5GHz-1 Channel

• Security:  WPA/WPA2-Personal
• Version:  WPA2-PSK
• Encryption:  AES
• Mode:  802.11ac only
• Channel Width:  Auto (current 80MHz)
• Channel:  Auto (current channel 44)
• Transmit Power:  High
• Airtime Fairness:  Enabled (no change in performance when disabled)
• MU-MIMO:  Enabled

 

5GHz-2 Channel

• Security:  WPA/WPA2-Personal
• Version:  WPA2-PSK
• Encryption:  AES
• Mode:  802.11ac only
• Channel Width:  Auto (current 80MHz)
• Channel:  Auto (current channel 149)
• Transmit Power:  High
• Airtime Fairness:  Enabled (no change in performance when disabled)
• MU-MIMO:  Enabled

 

All guest networks are disabled.  All NAT settings remain at their defaults.  Anti-virus is enabled.  All firewall options (Enable SPI Firewall, Allow Pings from the WAN Port, Allow Pings from the LAN Port) are all set.  Access Control is disabled.  IP and MAC binding is disabled.

 

MAC address is not cloned.  Switch mode was and remains "Router".

 

I'm currently not using any QoS features (application and device priority) but when I did, by prioritizing gaming traffic, I did not see any changes in WiFi performance.

 

I was using 8.8.8.8 / 8.8.4.4 for the DNS but just changed it to dyamic from the ISP (75.75.75.75 / 75.75.76.76) and that didn't help.

 

Something I did notice that changed, when AT&T was my ISP, is that I used to have the Dynamic DNS configured to use TP-Link with my TP-Link ID.  Now, with Comcast, it says that DDNS is unavailable and I need to login but when I do, it says the "Request timed-out."

 

I'm also no longer able to check for a firmware upgrade from the router as I did before.  I now get the error message "Unable to connect to the cloud server. Please try again later."

 

I was expecting much faster WiFi performance and I guess upwards of 200Mbps is much faster than 24Mbps (simple measure of WiFi being the slowest chain in the link).  However, I expected the 5GHz performance to be better.  Is this as good as it gets?  If so, I should just downgrade my internet service from 1Gbps to 300Mbps and save some money.  I only have one PC connected directly to the router and everything else is wireless.

Dear customer,

The link speed of your wireless adapter is not very good. The specification of this card is maximum 867Mbps on 5GHz. So I guess is your computer far away from our router? We could help you to check your problem.