If you’ve recently opened your Windows Device Manager on a Dell computer and noticed a yellow exclamation mark next to a device labeled "SM Bus Controller," you aren't alone. This is one of the most common driver issues users face after upgrading to or performing a clean install of Windows 10.
While your computer might seem to be working fine, ignoring this error can lead to system instability, slower performance, or issues with power management.
In this guide, we will walk you through exactly what the SM Bus Controller is, why it’s missing, and the three best methods to download and install the correct driver for your Dell running Windows 10 64-bit. sm bus controller driver windows 10 64 bit dell
A: Because the SM Bus is a core part of the chipset. Dell bundles it into the larger Chipset Driver Package to ensure all motherboard components are installed simultaneously.
You will not see a driver literally named "SM Bus Controller." Instead, look for these package names: If you’ve recently opened your Windows Device Manager
To download the correct driver, you need two pieces of information:
Locate your Dell Service Tag (a 7-character alphanumeric code) on the device sticker or by typing wmic bios get serialnumber in Command Prompt. Alternatively, use your laptop model (e.g., Dell XPS 13 9360, Latitude 5490, Inspiron 3880). A: Because the SM Bus is a core part of the chipset
Modern versions of Windows 10 (64-bit) include a vast library of native drivers, but they rarely include proprietary Dell chipset drivers. Here is why the SM Bus controller appears as an unknown device after a fresh OS installation:
Key takeaway: Windows 10 64-bit does not have a universal SM Bus driver. You must obtain the exact driver for your specific Dell model.