Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I want to perform a cheap CPU upgrade on an old Socket AM2 motherboard. I currently have an Athlon 64 X2, and want to upgrade to a quad-core AMD Phenom. IIUC, Socket AM2+ CPUs are backwards compatible with Socket AM2 motherboards. However, my motherboard (an ABit KN9) does not have a BIOS upgrade available to support this and is not officially compatible with any AM2+ CPUs.

At a technical level, what does the BIOS have to do with supporting specific CPU makes/models? What would be the likely consequences of installing an AM2+ CPU on this motherboard? Would the computer likely:

  • Not even POST
  • POST but not boot
  • Boot but be lacking some important features
  • Work with a few purely cosmetic issues

or something else?

share|improve this question
add comment

1 Answer

up vote 2 down vote accepted

In the one instance I've (accidently) tried to put an AM2+ into an AM2 board (some ASUS) it didn't POST. Some head scratching, manual reading and a BIOS upgrade later it Just Worked (tm).

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.