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 have two identical computers (same mobo, memory, and peripherals) both running Ubuntu 12.10. The only difference is one has an Intel Core i7-3770K and the other has an Intel Core i7-3770S. I have also double checked that both computers have the exact same bios settings (minus cpu voltage levels).

Here is the problem: On reboot (via the OS or by pressing "reset" button), the computer with the 3770K does a full power cycle before booting up again. The computer with the 3770S stays powered on during reboot.

I desire to have both computers perform a full power cycle on reboot.

My Questions: 1) What causes a computer to power cycle / not power cycle during reboot. 2) What could potentially be the difference between my two set-ups that causes this?

Things I have tried:

  1. Switching HDs between the computers does not produce different results. The behavior seems to follow the CPU/mobo hardware around, not the OS.
share|improve this question
    
My guess would be it's in your power supply. Swap them out and see if it follows it. –  kmort Apr 30 '13 at 19:38

1 Answer 1

up vote 1 down vote accepted

I would be curious as to your CPU settings in the BIOS. I had a high-end Asus motherboard which would soft-reboot without a full power cycle using the stock CPU speeds. However, if you enabled overclocking and overclocked the CPU, then it would always do a full power cycle when restarting (I presumed it was a safety precaution).

share|improve this answer

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.