SM Bus Controller and It’s Drivers

The System Management Bus (SMBus or SMB) controller is a simple, single-ended, two-wire bus designed for lightweight communication. The SMBus controller enables efficient communication between a computer and essential hardware components like the Power Supply Unit (PSU) and cooling fans. Essentially, it allows the computer to execute commands such as power control and fan operation.

The SM Bus Controller’s functionality extends beyond facilitating communication and control of hardware components like PSUs and cooling fans by the operating system. It is also used by many laptops for monitoring battery and temperature levels. Furthermore, its potential adaptability is demonstrated by developers who have used it for easy firmware loading and installation on devices.

How to Update Your SM Bus Controller Drivers

When installed correctly, a computer’s SM Bus Controller operates unnoticed. However, improper installation may cause it to appear in the Device Manager with an exclamation mark, indicating an issue with the controller or its drivers. Although typically not a significant problem, the persistent reminder of an incorrectly installed SM Bus Controller can be bothersome to an average computer user.

Thankfully, resolving this issue and restoring your SM Bus Controller to its previous state (merging in appearance with the connected devices it monitors) is straightforward. Simply update your SM Bus Controller’s drivers to the latest version. Here are two ways you can do this:

Download the latest chipset drivers from the manufacturer’s official website

Identify your computer motherboard’s model and its manufacturer. If not custom-built, retrieve the drivers easily from the manufacturer’s website by entering your system’s model number, usually found on the front or back.


Visit the Support, Products, or Downloads page on the official website of your motherboard’s manufacturer.

Search your motherboard’s model number to find a list of the latest drivers. For instance, a webpage lists updated drivers for the Gigabyte GA-H81M-DS2V.

Download and install the latest chipset drivers for your motherboard.

After installing the latest Chipset drivers, the SM Bus Controller will no longer appear in the Device Manager and all reminders or warning messages should cease.


Kevin Arrows

Kevin Arrows is a highly experienced and knowledgeable technology specialist with over a decade of industry experience. He holds a Microsoft Certified Technology Specialist (MCTS) certification and has a deep passion for staying up-to-date on the latest tech developments. Kevin has written extensively on a wide range of tech-related topics, showcasing his expertise and knowledge in areas such as software development, cybersecurity, and cloud computing. His contributions to the tech field have been widely recognized and respected by his peers, and he is highly regarded for his ability to explain complex technical concepts in a clear and concise manner.