Unlocking phenom x3 720

Probably has nothing to do with the unlocking. Reinstall the driver.

Thanks for the advice. I'll try it out! Very kind of you

Also if you are not using a mic go into the Sound manager and mute that channel (alot of times that type of noise is just feedback on the line-in or microphone input.

But I do not think it is connected to having the 4th core unlocked (unless the extra power being used by the CPU is the cause of the feedback !)

Have reinstalled the realtek driver but unfortunately no success. Muting didn't help either.
In the meantime I have checked all 4 cores up to 3.5 GHz at stock voltage.

Start the audio application and check the task manager at the "processes" tab for spikes in the CPU usage.

I see no spikes in the task manager. I notice that the noise is less in one of the two audiochannel so that I can greatly improve using audio balance.

Try with some other speakers.