Wi-Fi on my computer is slow, but on my phone it's lightning fast: 10 reasons and solutions

Have you noticed that Wi-Fi on my computer works worse than on my phone.Pages take forever to load, videos are laggy, and download speeds drop to zero—while my smartphone, using the same router, shows a stable 100+ Mbps. What's going on? Why is one device flying while the other is barely moving?

This problem is more common than you might think. According to our data, up to 40% of users are experiencing a difference in Wi-Fi speed between their PC and mobile devices. This is due not only to router settings, but also computer hardware limitations, drivers, background processes, and even physical interference. In this article, we'll look at all possible reasons, including those that are not mentioned in standard instructions.

Spoiler alert: in 70% of cases, the problem can be resolved in 5-10 minutes without purchasing new equipment. Let's start with the most obvious and work our way to the hidden pitfalls.

1. Different Wi-Fi Standards: Is Your PC Just Outdated?

The first and most common reason is incompatibility of Wi-Fi standards between the computer and the router. Modern smartphones (even budget ones) support Wi-Fi 5 (802.11ac) or Wi-Fi 6 (802.11ax), while older laptops and PCs can only run on Wi-Fi 4 (802.11n) - or even worse, 802.11g.

What are the consequences?

• 📉 Speed: Wi-Fi 4 is limited to 150–300 Mbps (in reality, 50–100 Mbps), while Wi-Fi 5 provides up to 1 Gbps, and Wi-Fi 6 – up to 2 Gbps.
• 📶 Range: Old standards work worse at a distance and through walls.
• 🔄 Interference: Legacy protocols suffer more from airtime congestion (neighboring networks, microwaves, etc.).

How to check what Wi-Fi your computer supports?

• 🪟 Windows: Open device Manager → Network adapters → find the name of your Wi-Fi module (for example, Intel Wi-Fi 6 AX200). Search for its characteristics on Google.
• 🐧 Linux: Enter in the terminal lspci | grep -i network or iwconfig.
• 🍎 MacOS: Click on the Wi-Fi icon in the menu bar while holding down the key Option — information about the standard will appear.

⚠️ Note: If your adapter is older than 2015, it almost certainly does not support Wi-Fi 5/6. In this case, replacing the Wi-Fi module or purchase USB adapter (For example, TP-Link Archer T4U) can increase the speed by 2-5 times.

2. Drivers: Why updating can both help and harm

Network adapter drivers are the "translator" between the hardware and the operating system. If they are outdated, corrupted, or incorrectly configured, Wi-Fi speed can drop by 10 times, even if the router and adapter support modern standards.

Typical symptoms of driver problems:

• 🔄 Wi-Fi periodically disconnects and reconnects.
• 🐢 The speed "jumps" from 1 Mbps to normal without any apparent reason.
• ❌ B Device Manager There is an exclamation mark next to the adapter.

How to check and update drivers:

1. Open device Manager (Win + X → device Manager).
2. Expand the tab Network adapters, find your Wi-Fi module.
3. Right click → Update driver → Automatic search.
4. If Windows does not find any updates, download the driver from the manufacturer's website (for example, Intel, Qualcomm Atheros, Realtek).

⚠️ Warning: Sometimes Automatic driver updates via Windows Installs a generic version that performs worse than the original. If speed drops after the update, roll back the driver or install it manually from the manufacturer's website.

3. Router settings: why the phone works, but the PC doesn't

The router can be configured so that priority is given to mobile devices — or, conversely, limits them. Here are the key parameters worth checking:

How to change settings:

1. Open your router's control panel (usually at 192.168.0.1 or 192.168.1.1).
2. The login and password are usually indicated on the router sticker (for example, admin/admin).
3. Find sections Wireless, Wi-Fi Settings or Advanced.

4. Background processes: who is stealing your Wi-Fi?

There are programs that can run on your computer secretly consume traffic — torrents, cloud syncs, Windows updates, or even viruses. On a phone, these data-hogging devices are usually less common (unless you count background videos on TikTok).

How to find and disable "parasites":

• 🪟 Windows: Open Task Manager (Ctrl + Shift + Esc) → tab NetSort by column Netto see who consumes the most traffic.
• 🐧 Linux: Use the command nethogs or iftop in the terminal.
• 🍎 MacOS: Launch Activity Monitor → tab Network.

Typical culprits:

• 🔄 Windows Updates: They can download gigabytes in the background. Disable it. Settings → Update & Security → Advanced Options → Delivery Optimization.
• ☁️ Cloud services: Google Drive, Dropbox, OneDrive sync files without your knowledge.
• 🎮 Game clients: Steam, Epic Games, Origin update games in the background.

5. Physical interference: walls, microwaves, and neighbors

Wi-Fi is radio waves that weakened by obstacles and interference. A phone may have a better signal than a computer for several reasons:

• 📱 Antennas: Smartphones often use more sensitive antennas with MIMO (several antennas for reception/transmission).
• 📡 Location: The phone usually lies on the table or in the hand, and the laptop's Wi-Fi module may be covered by the case or screen.
• 🔋 Energy saving: Many laptops reduce the power of the Wi-Fi adapter when running on battery power.

How to improve the signal:

• 🔄 Move the router closer to the computer (ideally, to an open, higher location).
• 🚫 Keep metal objects, mirrors, and microwave ovens away from the router.
• 📶 Change the Wi-Fi channel in the router settings (use Wi-Fi Analyzer on your phone to find the least crowded channel).
• 🔌 Plug your laptop into a power outlet - this will disable power saving modes.

⚠️ Attention: If you live in an apartment building, interference from neighbors may block the signal on certain channels. Use the channels 1, 6 or 11 (for 2.4 GHz) - they do not intersect.

6. Energy Saving Settings: Why Windows Throttles Wi-Fi

Windows by default limits the power of the Wi-Fi adapterto save battery life. This can reduce speed by 30–50%, especially on laptops. On phones, such restrictions are usually absent (or less severe).

How to disable power saving for Wi-Fi:

1. Open device Manager → Network adapters.
2. Right-click on your Wi-Fi module → Properties → tab Power management.
3. Uncheck the box Allow the computer to turn off this device to save power.
4. Go to the tab Additionally and find parameters like Wireless Mode, Transmit Power or Roaming Aggressiveness. Set the maximum values.

For Linux And MacOS:

• 🐧 In Linux, check your settings iwconfig or nmcli (parameter power save should be off).
• 🍎 On MacOS, disable Energy savings in the battery settings.

7. Viruses and malware: who's slowing down your Wi-Fi?

If there are viruses on your computer or network worms, they can:

• 🕵️‍♂️ Steal traffic for mining, DDoS attacks or spamming.
• 🔄 Reset the network adapter thousands of requests.
• 🚫 Block legitimate connections (for example, through change hosts-file).

How to check and clean the system:

1. Check your computer Malwarebytes, Kaspersky Virus Removal Tool or built-in Windows Defender.
2. Open Task Manager and check for unknown processes with high network traffic.
3. Review the list of connected devices in the router (in the control panel). If there are any unfamiliar ones there MAC addresses - Someone is using your Wi-Fi.

⚠️ Warning: Some viruses disguise themselves as system processes (for example, svchost.exe). If in doubt, boot into Safe Mode with Networking and check your Wi-Fi speed. If it returns to normal, the problem is definitely software-related.

8. DNS and MTU: Hidden Settings That Slow Down Your Internet

Sometimes the problem is not the Wi-Fi speed, but network settings - for example, in the wrong ones DNS servers or too large a value MTU (maximum packet size). This results in:

• 🌐 Slow loading of websites (while the speed in tests is normal).
• 🔄 Packet loss and constant reconnections.
• 🚫 Inability to open some resources (for example, YouTube or Netflix).

How to check and fix:

1. Change DNS:
   • Open Control Panel → Network and Internet → Network and Sharing Center → Change adapter settings.
   • Right-click on your Wi-Fi → Properties → Internet Protocol version 4 (TCP/IPv4) → Properties.
   • Set up DNS 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).

ping -f -l 1472 ya.ru

FAQ: Frequently Asked Questions About Wi-Fi Speed ​​Differences