The is a legacy quad-core desktop processor released in 2009 that continues to be a reliable choice for budget builds and office systems. Because it is a processor, it does not require a standalone "driver" in the traditional sense; instead, it relies on your operating system and motherboard chipset drivers to function correctly. How to Update Drivers for the Q8400
If you are searching for a driver to improve performance or fix stability issues, you should focus on the and the motherboard-specific drivers. Intel® Driver & Support Assistant Fundamentals intel r core tm 2 quad cpu q8400 driver download