BSOD 124 means mostly "add/remove vcore or QPI/VTT voltage", and if ur sys errors on prime with that voltage than itīs not stable. Itīs also not healthy for ur cpu to set llc off but pumping then more and more vcore into to geht it stable find the sweet spot between these settings my rig is passing prime for hours and and linx by 4,6ghz with a offset of 0,02 and a regular llc and no pll overvolting, so i think u should test a little more.