The Intel® Core™ i5-2xxx Processeurs pour PC de bureau use a chipset based on the Chipsets Intel® 6 Series Express, while the Intel® Core™ i5-3xxx Desktop Processors use a chipset based on the Chipsets Intel® 7 Series Express. These processors are backward and forward compatible with some notable exceptions.
Check with the manufacturer of the desktop board you are using to see if it supports the processor you want to use and the recommended update process.
If you are installing an Intel® Core™ i5-3xxx Processor on a desktop board based on the Intel® 6 Express Series Chipset, it might require: updated BIOS, ME8 firmware, and drivers.
This document shows the update process for Intel® Cartes mères pour PC de bureau based on the Intel® 6 Series Express Chipset: Updating the BIOS on Intel® Cartes mères pour PC de bureau with Chipsets Intel® 6 Series Express