Switching to 5 GHz Wi-Fi: Why it's beneficial and how to do it right

Range 5 GHz In Wi-Fi networks, wireless broadband has long ceased to be a novelty—today it's the standard for those who value speed, stability, and minimal latency. However, many users still use outdated bands. 2.4 GHz, without even realizing their router supports a more modern frequency. Switching to 5 GHz can increase internet speed by 2-3 times, reduce interference from neighbors, and improve online gaming, video calls, and 4K streaming.

But why isn't everyone switching to this range? Most often, users are stopped by myths: 5 GHz doesn't work through walls., "not all devices support" or "the setup is too complicated"In fact, modern routers (even budget models from TP-Link, Xiaomi or ASUS) can automatically balance the load between bands, and most smartphones, laptops, and TVs from the last five years have been working with 5 GHz out of the box. In this article, we'll discuss how to check the compatibility of your devices, configure your router for maximum performance, and avoid common mistakes when migrating.

Why 5 GHz is better than 2.4 GHz: A comparison of bands

The main advantage 5 GHz - This channel width up to 160 MHz (versus a maximum of 40 MHz for 2.4 GHz), which allows for faster data transfer. For example, when connecting to a router ASUS RT-AX88U On Wi-Fi 6 at 5 GHz, the actual speed can reach 1.2 Gbps, whereas at 2.4 GHz, even in ideal conditions, you will get no more than 300 Mbps.

In addition, the 5 GHz band is less congested: while up to 20–30 networks can operate simultaneously on 2.4 GHz in an apartment building (with interference!), there are usually no more than 5–10 on 5 GHz. This is critical for online gaming, where every millisecond of latency (ping) on the account, or for video conferencing, where stability is more important than peak speed.

However, 5 GHz also has its drawbacks. The main one is shorter signal rangeHigher frequency waves have a harder time passing through walls and ceilings, so in larger houses it may be necessary to install mesh systems (For example, TP-Link Deco or Google Nest Wi-Fi) or additional access points. The second caveat is that not all older gadgets (for example, some models) Samsung Galaxy S5 (or laptops before 2014) support this range.

Checking device compatibility with 5 GHz

Before setting up your router, make sure your devices support the 5 GHz band. There are several ways to do this:

• 📱 Smartphones and tablets: Go to your Wi-Fi settings, find your network, and see if there's a mark next to its name. 5G or 5 GHzOn . Android you can also use the app WiFi Analyzer, which will show all available networks with frequency indication.
• 💻 Laptops and PCs: on Windows open device Manager → Network adapters and find the Wi-Fi module model. Enter its name in the search engine with the query "5 GHz support". For example, an adapter Intel AX200 supports both ranges, and Realtek RTL8188EE - only 2.4 GHz.
• 📺 TVs and media set-top boxes: in the network menu (Settings → Network → Wi-Fi) there should be an option to select a range. LG OLED And Samsung QLED Models after 2018 support 5 GHz by default.

If your device doesn't support 5 GHz, but your router is dual-band, you can leave the 2.4 GHz network for it only, and switch the rest of your devices to 5 GHz. To do this, create a new network in your router settings. guest network at 2.4 GHz specifically for older devices.

⚠️ Attention: Some manufacturers (eg Xiaomi Budget routers disable 5 GHz by default to save power. If your network doesn't appear in the list, check your router's power settings.

How do I find out the model of my Wi-Fi adapter on a Mac?

Open About this Mac → System Report → Net → Wi-Fi. In the line Interface map the chip model will be indicated (for example, Broadcom BCM43xx).

Configuring a router to operate in the 5 GHz band

If your router supports 5 GHz (and most modern models do), you can switch to this band through the web interface. Let's look at the universal instructions, which are suitable for most brands (TP-Link, ASUS, Keenetic, MikroTik and others).

1. Connect to the router via cable or Wi-Fi (2.4 GHz).

2. Open your browser and enter your router's IP address in the address bar. This is usually 192.168.0.1, 192.168.1.1 or 192.168.8.1 (check the sticker on the device body).

3. Enter your login and password (by default it is often admin/admin or admin/empty).

4. Go to the wireless network section. The path may vary:

   • TP-Link: Basic → Wireless
   • ASUS: Wireless Network → General
   • Keenetic: Wi-Fi → Hotspot

In your wireless network settings, find the settings for 5 GHz (may be called 5GHz, Wireless-N/AC or Band 5). Set the following parameters for optimal performance:

• 📶 Network Name (SSID): You can leave it the same as on 2.4 GHz, or add a suffix (for example, MyWiFi_5G).
• 🔒 Security type: Select WPA2-PSK or WPA3-PSK (if supported). Avoid deprecated WEP!
• 📊 Channel width: For maximum speed, select 80 MHz (if the router supports Wi-Fi 5/6). In densely populated areas, you can try 40 MHz to reduce interference.
• 🎯 Channel: Manually select the least loaded channel (use apps like WiFi Analyzer for analysis). Optimal channels for 5 GHz: 36, 40, 44, 48, 149, 153, 157, 161.

After applying the settings, the router will reboot, and your 5 GHz network will appear in the list of available networks. Connect to it using the new password (or the old one, if the SSID hasn't been changed).

5 GHz Signal Optimization: How to Boost Your Coverage

As already mentioned, 5 GHz is worse at passing through obstacles, than 2.4 GHz. If the speed drops in some rooms after switching, try the following solutions:

• 📡 Router positioning: Place it in the center of your apartment, on a raised surface (for example, on a closet). Avoid enclosed spaces (tables, drawers) and sources of interference (microwaves, cordless phones).
• 🔄 Mesh systems: If the area of ​​the house exceeds 100 m², consider buying mesh router (For example, TP-Link Deco X60 or Netgear Orbi). They automatically switch devices between nodes, ensuring a stable signal.
• 📶 Repeaters and access points: A budget option is to install a repeater (for example, Xiaomi Wi-Fi Repeater 2), but it can reduce speed by 30–50%. It is better to use an access point connected via cable.
• 🔧 Setting the transmit power: In some routers (for example, ASUS or Keenetic) You can increase the signal strength manually. Look for the parameter Tx Power and set the value High or 100%.

Also pay attention to Wi-Fi standard your router:

• Wi-Fi 4 (802.11n) — maximum 450 Mbps at 5 GHz.
• Wi-Fi 5 (802.11ac) — to 1.3 Gbps.
• Wi-Fi 6 (802.11ax) — to 2.4 Gbps + better performance in interference conditions.

If your router is older than 5 years, it might be time to think about replacing it. For example, TP-Link Archer AX6000 or ASUS RT-AX86U will provide not only high speed at 5 GHz, but also support for modern technologies such as OFDMA And MU-MIMO.

⚠️ Attention: Some internet service providers (eg. Rostelecom or Beeline) block changes to Wi-Fi settings on rented routers. If you have a "gray" router from your provider, contact support to unblock it or buy your own.

Separating 2.4 GHz and 5 GHz Networks: Pros and Cons

Many routers by default combine both ranges into one network with the same SSID (network name). This is convenient because devices automatically switch between frequencies. However, this approach has its drawbacks:

• ⚖️ Incorrect switching: Some devices (especially Android-smartphones) get stuck on 2.4 GHz, even when the 5 GHz signal is stronger.
• 📉 Speed ​​drop: If the router can't Band Steering (automatic band assignment), it can connect devices to a less optimal frequency.
• 🔄 Problems with IoT devices: Many "smart" gadgets (Xiaomi Mi Home, Philips Hue) operate only at 2.4 GHz and may lose connection in interconnected networks.

Solution - divide the networks, giving them different names (for example, MyWiFi_2G And MyWiFi_5G). This way, you can manually select the band for each device. The downside of this approach is that you'll have to reconnect as you move around the house (for example, from 5 GHz to 2.4 GHz in a distant room).

To separate networks:

1. Go to your router settings.
2. Find the section Wireless network or Wi-Fi.
3. Disable the option Smart Connect, Band Steering or Combining ranges (the name depends on the model).
4. Assign different SSID for 2.4 GHz and 5 GHz.
5. Save the settings and reboot the router.

Common problems when switching to 5 GHz and their solutions

Even after proper setup, users may encounter difficulties. Let's look at the most common ones:

If after all manipulations the problems remain, check:

• 🔌 Router power supply: Use the original power supply. Some budget routers disable the 5 GHz band when power is insufficient.
• 🔄 Router firmware: Outdated software may contain errors. Update the firmware via the web interface (section Administration or System tools).
• 📡 Antennas: If your router has removable antennas, try replacing them with more powerful ones (for example, with gain 5 dBi).

⚠️ Attention: On some routers (for example, Zyxel Keenetic) After updating the firmware, the Wi-Fi settings are reset. Before updating, make a backup copy of the configuration in the System → Configuration.

Additional tips: how to get the most out of 5 GHz

If you've already switched to 5 GHz and everything is working smoothly, you can optimize your network even further:

• 🚀 Enable MU-MIMO: This technology allows the router to communicate with multiple devices simultaneously (instead of one at a time). Look for this option in your wireless network settings.
• 🔗 Activate Beamforming: This feature focuses the signal towards connected devices, increasing range and stability. It can be enabled in the section Wireless → Professional (the name may differ).
• 📊 Configure QoS: Traffic prioritization can help, for example, reduce ping in games or improve the quality of video calls. In routers ASUS this is called Adaptive QoS.
• 🔒 Disable legacy standards: Disable support in security settings WPA And TKIP, leaving only WPA2-AES or WPA3This will speed up the connection and increase security.

For advanced users: If your router supports OpenWRT or DD-WRT, you can install alternative firmware for fine-tuning. For example, in DD-WRT can be set manually TX Power (transmission power) or adjust VLAN to separate traffic.

Don't forget about updating drivers on connected devices. For example, on a PC with Windows come in device Manager, find your Wi-Fi adapter and update the driver through the context menu. Mac check for updates via Software update.

How to check your real Wi-Fi speed?

Use services Speedtest.net or Fast.com, but connect to the router via cable to test your internet speed from your provider. To check your Wi-Fi speed, use the utility iPerf3 (testing the local network).

FAQ: Answers to frequently asked questions

My router doesn't support 5 GHz. What should I do?

If your router is older than 2012 or is a budget model (for example, TP-Link TL-WR740N), it most likely only works at 2.4 GHz. Solutions:

• Buy a new router with 5 GHz support (from 2,000 ₽).
• Use 2.4 GHz, but choose the least crowded channel (1, 6 or 11).
• Connect a 5GHz access point (e.g. Ubiquiti UniFi).

After switching to 5 GHz, some devices stopped connecting. Why?

These devices most likely do not support 5 GHz. Check their specifications or switch back to a merged network (with the same SSID (for both ranges). An alternative is to create a separate 2.4 GHz network specifically for them.

Which 5GHz channel should I choose for minimal interference?

5 GHz channels are available in Russia 36–48 And 149–165. Channels 149–165 (DFN) are usually less loaded, but not all devices support them. Use the app WiFi Analyzer (Android) or NetSpot (iOS/macOS) to scan the airwaves.

Can 5GHz be used for IoT devices (smart home)?

Most smart home devices (Xiaomi, Tuya, Philips Hue) operate only on 2.4 GHz. If you have separated networks, connect them to 2.4 GHz. If the networks are combined, make sure the router is not forcing IoT devices to switch to 5 GHz (disable Band Steering for them).

Why is the speed on 5 GHz lower than on 2.4 GHz?

This can happen for several reasons:

• Channel width is too wide (try reducing from 80 MHz to 40 MHz).
• Weak signal (check the level in the device settings or through WiFi Analyzer).
• An outdated Wi-Fi adapter (eg. Realtek RTL8188 does not support high speeds on 5 GHz).
• Limitation from the provider (test the speed via cable).