Question I9 9900k temperatures

68C is not bad, IMO, as even my 7700K hits 68C in gaming at 4.7 GHz...(for reference, my 7700K hits 78C in in Priime95/small FFTs; the default 'blended' will typically be ~4C less at 74C, and, even CPU-z/bench/'stress CPU' hits 68C, roughly the highest peak temp normally seen in gaming...

If you want a true worst case thermal test, launch HWmonitor, then Prim95 v26.6)/small FFTs for even 15 minutes...; most folks are hitting 85-90C here, which makes 68C seem quite cool...