Warning to Linux users who want to upgrade to socket AM2 motherboards: You will almost definitely run into problems with Linux. I have an ASUS M2N32-SLI Deluxe motherboard. I upgraded the BIOS to the latest version, and that broke IO-APIC on all versions of the Linux kernel I've tried, including 2.6.17.7. I couldn't boot Linux without the "noapic" boot parameter. I solved this problem by restoring an older BIOS, and I lost a fancy NVidia acceleration feature in the process. That's no big deal for me because the feature primarily benefits Windows games and I don't play Windows games often enough to care.