Jumbo MTU Functionality and Benefits in Speedify

This article explains what the Jumbo MTU setting does in Speedify, how it can affect your speeds and CPU usage, and when you might need to turn it off.

What Is Jumbo MTU?

MTU stands for Maximum Transmission Unit, which refers to the largest size of a data packet that can be sent over a network connection. By default, most networks use a standard MTU size. Jumbo MTU allows Speedify to accept much larger data packets into the Speedify Virtual Network Adapter.

When Jumbo MTU is enabled, Speedify runs more efficiently and uses less CPU processing power, which can result in faster upload and download speeds. Because of these benefits, the Jumbo MTU setting is turned ON by default, and most users won't ever need to change it.

When Should You Turn Jumbo MTU Off?

In some cases, Windows users may run into problems when Jumbo MTU is enabled, including:

• Web pages not loading correctly or loading very slowly
• Unusually slow performance despite an active Speedify connection

If you're experiencing either of these issues, try turning Jumbo MTU off. Currently, this setting is managed automatically by Speedify on most platforms and can only be manually adjusted when running Speedify on a Windows computer.

How to Turn Off Jumbo MTU on Windows

Step 1

Open the Speedify app on your Windows computer.

Step 2

Click the Settings icon. You'll find the Jumbo MTU toggle listed in the settings panel. Turn it off.

After toggling the setting off, check whether your web pages load correctly and whether performance has improved.