Ethereum: Cgminer does not work on Windows with Nvidia graphics card

Mining Ethereum on Windows with Nvidia Graphics Card: cgminer Problems and Solutions

As an Ethereum user, you probably know the importance of having reliable mining software that can run smoothly on your system. However, for those who own an Nvidia graphics card, setting up cgminer can be a challenge. In this article, we will explore cgminer problems on Windows with Nvidia graphics cards and provide solutions to get you started.

The Problem :

When trying to launch cgminer on Windows using an Nvidia graphics card, users often encounter errors such as:

• Order not found

• Invalid block number

• Block size mismatch

These errors suggest that the mining software is unable to detect the Nvidia graphics card or is configured incorrectly, causing the program to fail.

The Solution:

To resolve these issues and successfully launch cgminer on Windows with an Nvidia graphics card, try the following steps:

Step 1: Update your system drivers

Before installing the latest mining software, make sure your Nvidia drivers are up to date. You can do this by:

• Clicking the “Start” button in the lower left corner of your screen and typing “Device Manager”

• Pressing the Windows key + X and selecting Device Manager

• Expand the “Display adapters” section to view and update the Nvidia driver

Step 2: Install the latest mining software

After updating your drivers, install the latest version of cgminer on your system. This can be done by:

• Downloading the latest version from the official website (

• Extracting the zip file and running make to build the latest version

• Installing the resulting .exe file

Step 3: Configure cgminer settings

In order for cgminer to work properly with your Nvidia graphics card, make sure to:

• Set the gpu option in the cgminer.conf file to True

• Use the -g option when running cgminer, specifying the GPU ID (if multiple GPUs are detected) or GPU name (if you only have one)

• Set the --block-size option to a value that matches your system’s block size (e.g. 256, 512)

Example configuration:

Here is a example configuration for cgminer on Windows:

cgminer --scrypt -o  -u usernmae -p mypass --thread-concurrency 8192 -I 10 -g Nvidia0 -w 256

Additional tips:

• Make sure to run the cgminer command as an administrator to ensure it has the necessary permissions.

• If you encounter any issues during installation, try rebooting your system and running the cgminer command again.

By following these steps and tips, you should be able to successfully configure cgminer on Windows with an Nvidia graphics card. Happy mining!

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