Windows 10: Windows 10 cutting Wi-Fi speed in half

I have 300Mbps Internet plan from Xfinity and for the past two years my Wi-Fi speeds on my gaming desktop PC have been very close to that mark according to various speed test apps. Recently, I noticed slow downloads and in-game stuttering. A speed check showed that I am only getting around 155 Mbps. At first, I blamed Xfinity, to my embarrassment. My iPhone 13, in my hand by the PC was getting about 308 with the same app. The PCs Wi-Fi Network Status page is showing the Wi-Fi link speed is 325, but Windows appears to be somehow throttling that down to 155. Windows appears to be doing something

:)

 

PC Wi-Fi network speed too slow

If you have two laptops as clients of the same band of the same AP, and they are maintaining a 130 megabits/sec signaling rate in both the client-to-AP and AP-to-client direction, the effective throughput should be around 5 MebiBytes per second.

When two Wi-Fi clients talk to each other, they do not send their packets directly to each other. Instead, every packet is relayed by the AP. So every packet transits the RF channel twice, which cuts the effective bandwidth in half.

Then, TCP over IPv4 over Wi-Fi, with 802.11n frame aggregation, is only about 60% efficient (maybe up to almost 80%, but I'm using 60% to be conservative here).

So…

Wireless-to-wireless cuts bandwidth in half: 130 Mbps / 2 = 65 Mbps

Wi-Fi overhead leaves only 60%: 65 Mbps * .6 = 39 Mbps

megabits to MebiBytes conversion is about 1/8.4: 39 Mbps / 8.4 = 4.6 MebiBytes/sec

So, your throughput should be able to be about twice what you've measured. Likely explanations:

1. Perhaps you're not really averaging the 130 Mbps signaling rate (maybe you looked at the speed your clients are getting when transmitting to the AP, but not the speed your AP is getting when transmitting to your clients).
   
2. Perhaps the file transfer tool you're using is inefficient. It would be interesting to see what speed iperf gets between the two machines.
   

 

Windows 10 and no wi-fi

Hi Joachim,

Thank you for posting your query in Microsoft Community. Appreciate your interest in using Windows 10.

I would suggest you to follow the methods below:

Method 1: Run the Hardware and Device troubleshooter by following the steps below:

• Click on the Start button, and type “Troubleshooting” on the search bar.
• Click on troubleshooting, then click on “Hardware and sound”.
• Under Hardware and sound, click on “hardware and devices”.
• A pop-up will appear, click on the “Next” button and your hardware troubleshooting will start.

Method 2: The issue may occur if the drivers for Wi-fi are not installed or updated. I suggest you to install/update the latest version for Wi-fi drivers by following the steps below.

• Press ‘windows key + R’ and type ‘devmgmt.msc’ and press Enter.
• Expand ‘Network adapter’ and right click on Wi-fi driver and select update.

Hope the information is helpful. Feel free to
write to us for any other assistance with Windows, we’ll be glad to assist you.

 

wi fi not working on windows 10

Hi,

Thank you for posting your query in Microsoft Community. Appreciate your interest in using Windows 10.

I would suggest you to follow the methods below:

Method 1: Run the Hardware and Device troubleshooter by following the steps below:

• Click on the Start button, and type “Troubleshooting” on the search bar.
• Under Hardware and sound, click on “hardware and devices”.
• A pop-up will appear, click on the “Next” button and your hardware troubleshooting will start.

Method 2: The issue may occur if the drivers for Wi-fi are not installed or updated. I suggest you to install/update the latest version for Wi-fi drivers by following the steps below.

• Press ‘windows key + R’ and type ‘devmgmt.msc’ and press Enter.
• Expand ‘Network adapter’ and right click on Wi-fi driver and select update.

Hope the information is helpful. Feel free to
write to us for any other assistance with Windows, we’ll be glad to assist you.