A few weeks ago my Windows 7 machine wouldn't post. I spent a good number of hours troubleshooting the problem but ended up having to RMA my mobo. Upon return I hooked everything back up, and while it would post as soon as Windows started up the processor was making a high pitched squealing noise.There was no way I was going to deal with that so I started searching on the internet for possible solutions.

I was able to narrow it down as I've had similar problems in the past and they are typically related to power, but everything looked good in the power settings within Windows, as well as the BIOS. Searching through a good number of forums finally lead me to a solution. Within regedit I went to: HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Control Power PowerSettings 54533251-82be-4824-96c1-47b60b¬740d00 5d76a2ca-e8c0-402f-a133-215849¬2d58ad and modified the Attributes from 1 to 0. Then back in the Control panel's power settings for the processor a new option was available to modify power management for the processor. Disabling this resolved the issue and my processor was immediately silent. The only trade off here is a slight temperature increase on the CPU while it isn't under load, and obviously some more power used. This was definitey worth implementing to me though as dealing with other means might have meant another RMA or crazy amounts of troubleshooting. Thanks to jesdanco over on the tomshardware.com forums all the way back in 2011 for this fix.