# How to Fix Windows 11 Slow Wi-Fi Speeds (2.4GHz vs 5GHz)

URL: https://www.mytechnician.tech/tips/fix-slow-wifi-speeds-windows-11/
Published: 2026-05-25 | Author: Ankit Kumar
Tags: Windows 11, Network, Wi-Fi, Performance
Summary: Wi-Fi slow but connected? Fix band choice, channel congestion, adapter updates, and router settings—not disconnects or DNS.
Recommended app: Network Traffic Monitor & Analyzer — https://www.mytechnician.tech/apps/network-monitor/ (Microsoft Store: https://apps.microsoft.com/detail/9NGCWN2BKVSC?hl=en-us&cid=mytechnician-web). Optional; every step below uses built-in Windows tools.

## The Problem
You pay for 300 Mbps but the laptop barely hits 40 on Wi-Fi—while a phone beside the router scores fine. **Slow Wi-Fi** is not the same as [Wi-Fi disconnecting](https://www.mytechnician.tech/tips/fix-wifi-keeps-disconnecting-windows-11/) or [DNS errors](https://www.mytechnician.tech/tips/fix-dns-server-not-responding-windows-11/). Wrong band (2.4 vs 5 GHz), crowded channels, old drivers, or "Wi-Fi 5" adapter on a Wi-Fi 6 router are the usual PC-side culprits.

> **Pages won't load but icon says connected?** Try [no internet secured](https://www.mytechnician.tech/tips/fix-no-internet-secured-wifi/). **Lag in games with OK speed tests?** [High ping](https://www.mytechnician.tech/tips/how-to-fix-high-ping-windows-11/).

## 2.4 GHz vs 5 GHz (and 6 GHz)
| Band | Best for | Tradeoff |
|------|----------|----------|
| **2.4 GHz** | Range through walls | Slower, crowded (microwaves, neighbors) |
| **5 GHz** | Speed in same room / line of sight | Shorter range |
| **6 GHz** (Wi-Fi 6E) | Very fast, new PCs/routers | Needs compatible hardware |

Use **5 GHz** (or **6 GHz**) for speed when the PC is near the router; **2.4 GHz** only when distance or walls demand it.

## The Fix: Step-by-Step

### Step 1: Connect to the Right SSID
Many routers broadcast **Name** and **Name_5G** (or one name with "smart connect"). On the PC:
1. **Settings** → **Network & internet** → **Wi-Fi** → connect to the **5 GHz** SSID if you are in the same room.
2. **Forget** the 2.4 GHz profile if Windows keeps preferring the slow one.

### Step 2: Measure Properly
1. Stand **same room as router** for the first test.
2. speedtest.net or fast.com on PC vs phone—if phone is fast and PC slow, keep fixing the PC; if both slow, fix router placement or ISP.

### Step 3: Update Wi-Fi Adapter Driver
1. **Device Manager** → **Network adapters** → Wi-Fi chip (Intel, Realtek, MediaTek, etc.).
2. Install the driver from **laptop vendor** or chip maker—version matters for Wi-Fi 6/6E throughput.
3. **Advanced** tab (if present): set **Wireless mode** to **802.11ax** or **ac** matching your router—not legacy **b/g** only.

### Step 4: Preferred Band and Roaming (Intel / Some Vendors)
In vendor Wi-Fi utility or **Device Manager** → adapter **Advanced**:
* **Preferred band** → **5 GHz** or **6 GHz** preferred.
* Disable aggressive **roaming** if the PC bounces to 2.4 GHz at the edge of range.

### Step 5: Router Channel and Width
Log into the router (often `192.168.1.1`):
* **5 GHz:** use **40 MHz** or **80 MHz** channel width for speed; pick a **non-overlapping channel** (36, 40, 44, 48 or auto if your analyzer app shows congestion).
* **2.4 GHz:** channels **1, 6, or 11** only; width **20 MHz** to reduce interference.
* Enable **WPA2/WPA3**—not open or WEP.

### Step 6: Band Steering and Mesh Nodes
"Smart connect" one SSID can stick slow devices on 2.4 GHz. Try separate SSIDs for 2.4 and 5 GHz, or in mesh systems place the **node** closer—backhaul on weak Wi-Fi caps client speed.

### Step 7: PC Power and USB Dongles
Laptops on battery throttle Wi-Fi:
**Settings** → **System** → **Power** → **Best performance** when testing. USB Wi-Fi dongles: use **USB 3** rear ports; cheap adapters overheat and throttle.

### Step 8: Disable Metered Connection
**Settings** → **Wi-Fi** → your network → **Properties** → **Metered connection** **Off** unless you need a cap.

### Step 9: When to Reset vs. Tune
**Settings** → **Network & internet** → **Advanced network settings** → **Network reset** only after driver and router checks—see [speed up slow internet](https://www.mytechnician.tech/tips/speed-up-slow-internet-connection-windows-11/) for DNS and bandwidth hogs.

> **See per-app usage:** [Network Traffic Monitor & Analyzer](https://www.mytechnician.tech/apps/network-monitor/) shows which app is saturating upload during slow tests.

## Realistic Targets
* **Wi-Fi 5 (ac)** laptop near router: often 200–400 Mbps on a gigabit plan—not always full gigabit.
* **Wi-Fi 4 (n)** or distant 2.4 GHz: 30–80 Mbps may be normal—upgrade adapter or run Ethernet for desk PCs.

## Ethernet Still Wins
For work-from-home desk setups, one cable beats endless Wi-Fi tuning—see [fix Ethernet not working](https://www.mytechnician.tech/tips/fix-ethernet-not-working-windows-11/) if you switch to wired.

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Source: https://www.mytechnician.tech/tips/fix-slow-wifi-speeds-windows-11/ — My Technician, free Windows 10/11 troubleshooting guides.
Related tool: Network Traffic Monitor & Analyzer (Network Traffic Monitor & Analyzer shows real-time bandwidth usage, active connections, and per-app network traffic on Windows 10 and 11.) — https://www.mytechnician.tech/apps/network-monitor/
More guides: https://www.mytechnician.tech/llms.txt