Hi having an issue with Z87 OCF if i clear CMOS with cpu temps under 5c and reboot i get a CPU led error and cant boot using LN2 switch or cold slow switch. After heating up the cpu again i can go into bios and set LN2 pre-test and cool cpu to -66c "dry-ice" and reboot just fine. I'm changing back and forth from stock bios and F1.51B also tried using clear CMOS jumper and remove battery.
I dont know what else to do, i have done the above steps 3 times to confirm the issue was consistent...
When i was using another board i didnt have any CB issues with the same CPU.