Thank you for contacting the Intel community.
You system is fine, if you don’t see the processor running above 3.30 GHz is because your system is not doing any work load that requires the turbo boost.
Please check the following links for you to understand how turbo boost work.
Turbo Boost Technology Frequency Tables for Intel® Core™ i5 Desktop Processors
Frequently Asked Questions about Intel® Turbo Boost Technology