This message was posted on behalf of Intel Corporation
Please bear in mind that Intel does not support overclock, when you overclock a processor you will be forcing the processor to work beyond the specification and Intel only provides support under the processor specifications.
If you would like some assistance about overclocking, you can try the following website:
NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
You can contact HP as well for them to guide you in the BIOS how to overclock the processor as they are more familiar with your system and how the components interact with each other.