there the same processors just one is OEM the other is retail!
AD5300OKA23HJ is an OEM/tray microprocessor
AD5300OKHJBOX is a Retail box microprocessor <---- AD5300OKA23HJ CPU package with Cooler included
so the base BIOS should support the CPU Regardless of date the boards where made!
Please list the parts in the builds >>Posting Guide<<
also what PSU are you using and what is the +12V rail rating/s?
also have you connected the 4pin CPU power connector on the board?