Based on the description I recommend you doing the following:
- Access the BIOS and reset it to default settings.
- You may run the Intel ® Processor Diagnostics Tool. This will diagnose the processor and test every single internal component inside the processor and then it will generate a report with the results. You can get it at:
- Update the drivers on your system including the BIOS chipset.
- Test the processor in other system if possible.
After doing these steps if issue persists and if the processor is running at its default speed, I recommend you contacting the seller or our support for them to proceed with a replacement if necessary.