If you can find the full AA number (e.g., ) or a model name printed near the RAM slots or PCIe slot, paste it here — I can give you the exact CPU support list.
Analysis of Processor Support for Intel Desktop Boards Utilizing the Intel 21-B6-E1-E2 Chipset Family (Intel 915/925 Express) intel 21 b6 e1 e2 motherboard processor support
This paper provides a comprehensive technical overview of the Intel desktop motherboard platform identified by the BIOS prefix string "Intel 21 B6 E1 E2." This identifier corresponds to the Intel 915 and 925 Express chipset family (Grantsdale/Alderwood). The document outlines the processor architecture support, socket compatibility, voltage regulation limitations, and the impact of the transition from DDR to DDR2 memory standards on CPU compatibility. It serves as a guide for system integrators and maintenance engineers managing legacy hardware. If you can find the full AA number (e