Reply

Nighthawk R7000 2.4ghz stuck at 80mbps on gigabit internet

Tlongx18
Follower

Nighthawk R7000 2.4ghz stuck at 80mbps on gigabit internet

Since I got Google Fiber Gigabit internet, in April, I have been unable to get my 2.4ghz band anywhere close to the 600mbps cap. I have only been able to get it to about 85mbps. Is there a known issue or any way to fix this?

Model: R7000|Nighthawk AC1900 Dual Band WiFi Router
Message 1 of 2
TheEther
Guru

Re: Nighthawk R7000 2.4ghz stuck at 80mbps on gigabit internet

TL;DR It's probably normal.

 

You'll never get 600 Mbps for several reasons:

  1. The R7000's advertised, maximum link speed of 600 Mbps uses a non-standard encoding scheme developed by Broadcom, called TurboQAM.  Most devices do not support TurboQAM.  The highest, standard speed is actually 450 Mbps.
  2. To achieve a link speed of 450 Mbps requires a device to support 3 spatial streams.  Only Macbook Pros, high-end PC laptops and desktops with high-end Wi-Fi adapters support 3 spatial streams.  Most smartphones support 1 or 2 spatial streams.
  3. To achieve a link speed of 450 Mbps also requires the use of 40 MHz channels.  Wi-Fi standards mandate the use of 20 MHz channels when multiple Wi-Fi networks are active.  This cuts the maximum link speed by a little more than half to 216.7 Mbps.  A 2 spatial stream device will have a maximum link speed of 144.4 Mbps.  1 spatial stream can do 72.2 Mbps.
  4. Due to the high overhead of Wi-Fi, actual speeds are commonly between 30% and 50% of the link speed.

Put all this together and you can probably expect to see ballpark speeds in the following ranges:

 

Spatial Streams Speed range (Mbps)
3 65 - 110
2 40 - 75
1 20 - 40

 

 

Message 2 of 2
Top Contributors
Discussion stats
  • 1 reply
  • 2926 views
  • 2 kudos
  • 2 in conversation
Announcements

Orbi WiFi 6E