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Intel® Ethernet Controller I225-V Upload Speed Shows 1Mbps

Content Type: Connectivity   |   Article ID: 000094581   |   Last Reviewed: 05/02/2023

Environment

Operating System

Windows® 10, 64-bit*
Intel® Ethernet Controller I226-V

Description

The upload speed is really bad, while the download speed is up to 600Mbps the upload speed is 1Mbps.

Resolution

  • Update the drivers to the latest available version provided by the manufacturer
  • Ensure that Energy Efficiency Ethernet settings on the driver and router side (if available) are disabled, by following the steps below:
    1. Open Device Manager.
    2. Double-click Network adapters.
    3. Right-click the network adapter you want, and then click Properties.
    4. On the Advanced tablook for Energy Efficient Ethernet (EEE) option and make the appropriate changes you want.
  • Change the following settings from the advanced menu in the controller properties
    1. Large Send Offload V2 (IPV4)
    2. TCP Checksum Offload (IPV6)