WiFi 6 Limits: Is 5.8G Stronger Than 5G?

With the popularization of WiFi 6 routers, many users have found that although the promotion mentions "faster, more stable and more devices connected", the actual experience in use is not as expected. Some people have even raised the question: Is the 5.8GHz frequency band really stronger than the 5GHz frequency band? Today, let's uncover the "hidden limitations" behind WiFi 6 routers and delve into the real differences between 5.8G and 5G.

Is the WiFi 6 router really that "divine"?

• The gap between publicity and reality
  WiFi 6 (802.11ax) has indeed brought about many technological upgrades in theory, such as OFDMA, MU-MIMO, 1024-QAM modulation, etc. These technologies perform excellently in high-density device access and low-latency transmission. However, many users have found in actual use that the improvement in network speed is not significant, and sometimes it is even less stable than the old WiFi 5 router.

• The hardware threshold is high and compatibility is limited
  The performance of WiFi 6 requires that the terminal devices also support the WiFi 6 protocol. If your mobile phone, laptop and other devices are still at WiFi 5 or below, then no matter how advanced the router is, it cannot fully exert its performance. In addition, many entry-level WiFi 6 routers have significantly reduced their hardware configuration, such as insufficient CPU performance and small memory capacity, which will also affect their actual performance.
  

5.8GHz and 5GHz: Behind the Battle for Frequency Bands

Are they in the same frequency band?

First of all, it should be clear that 5.8GHz is actually part of the 5GHz frequency band. In the WiFi standard, the 5GHz frequency band is divided into multiple sub-bands, including 5.2GHz, 5.8GHz, etc. Therefore, 5.8GHz is not a "stronger" frequency band, but rather the higher part of the 5GHz frequency band.

The advantages and disadvantages of 5.8GHz

• Advantages
  Less interference: As the 5.8GHz frequency band uses relatively fewer devices, in some environments, the interference is lower than that of 5.2GHz.
  Some channels support higher bandwidths, such as 80MHz or even 160MHz, which are suitable for high-speed transmission requirements.

• Disadvantage
  Weaker wall-penetrating capability: The higher the frequency, the faster the signal attenuation, and the wall-penetrating performance is not as good as 5.2GHz.
  Some devices do not support: Some older devices or low-end mobile phones may not support the 5.8GHz frequency band, resulting in an inability to connect.

"Hidden Limitations" of WiFi 6 Routers

• Automatic bandwidth switching mechanism
  Many WiFi 6 routers default to enabling "dual-band integration" or "Smart Band Switching", which automatically selects 2.4GHz or 5GHz based on signal strength. However, this mechanism is not always "intelligent". Sometimes it wrongly guides the device to frequency bands with high interference or low speed, which instead affects the experience.

• The transmission power is limited.
  According to the national radio management regulations, the transmission power of routers is strictly limited, especially in the 5GHz frequency band. Therefore, even if the router supports high bandwidth, its coverage may still fall short of expectations due to power limitations.

• Scheduling bottlenecks when multiple devices are running concurrently
  Although WiFi 6 supports OFDMA and MU-MIMO technologies, which theoretically can improve the concurrent efficiency of multiple devices, in practice, the router's scheduling algorithm, hardware processing capacity, and the support level of terminal devices will all affect the final effect. Even when there are a large number of devices and significant differences in traffic, lag or delay may still occur.

How to choose a Wi-Fi 6 router that suits you?

• Check the hardware configuration clearly
  When choosing a WiFi 6 router, do not only look at the "WiFi 6" label, but also pay attention to parameters such as CPU model, memory size, antenna gain, and supported bandwidth. It is recommended to choose a router with at least a quad-core CPU and more than 256MB of memory to ensure the stable operation of multiple devices.

• Select the frequency band according to the usage scenario
  For large-sized apartments and multi-wall environments: Give priority to the 5.2GHz frequency band, which has stronger wall-penetrating capability.
  Open space/short-distance high-speed transmission: You can try the 5.8GHz frequency band, which has less interference.
  There are many old devices: It is recommended to turn off "dual-band integration" and manually allocate frequency bands to avoid compatibility issues.

• Firmware and brand selection
  Some brands offer more mature firmware optimization and frequency band scheduling strategies, providing a better user experience. It is recommended to choose a model that supports third-party firmware (such as OpenWrt, Merlin) to facilitate later optimization.
  

The WiFi 6 router is not a "panacea". Its actual performance is limited by multiple factors such as hardware, terminals and environment. However, 5.8GHz is not "absolutely superior" to 5GHz either; each has its own applicable scenarios. When choosing and using routers, users should view the promotion rationally and make judgments based on their own needs, so as to truly bring out the potential of WiFi 6.