If you have to contact MSI for BIOS update(s), then it's not a "retail" board.
Perhaps prototype was the wrong choice of phrase on my part, but given it's not a consumer board with information available about it - nobody is going to be able to tell you definitively that "yes, you can OC" or "no, you can't". It's going to be 100% guesswork.
I'd be very curious whether all 4x DIMM slots work though - if you ever get round to testing that, please let me know.
Anshu1999 :
So please reply in simple words can I oc a 6 gen i5 irrespective of k or non k type ???
Maybe.
Probably BCLCK at most. Even if you can OC (fully or BCLCK), I would imaging stability will be a bit of an issue, but I don't know for sure.