EHarr3, Thank you for posting in the Intel® Communities Support.
Just to let you know, some models of motherboards have a setting in the BIOS that is enabled by default and that overclocks the processor base frequency, the Intel® Core™ i5-9600KF has 3.70 GHz of clock speed and 4.60 GHz when Max Turbo Frequency gets activated as you can see here:
https://ark.intel.com/content/www/u...9600kf-processor-9m-cache-up-to-4-60-ghz.html
So, the best thing to do will be to get in contact directly with ASRock for them to verify the settings in the BIOS and make sure there is nothing in there forcing the processor to run at speeds it does not support:
www.asrock.com
Once you do that please install the Intel® Processor Diagnostics Tool, it will run a test on the unit and it will provide a report where you will be able to verify the clock speed detected, if it passed the test it should be working fine:
https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-Tool
In reference to the question about the warranty, normally, most of the stores have a 30 day warranty period for replacement on their products, but you will need to check that information directly with the place of purchase, depending which product is the one that got defective, that will be the fastest way in the case there is a hardware failure with any of the components of your platform.
Regards,
Alberto R.