Adaptive voltage and stable overclokc: can I have my cake and eat it too?

Greetings,

I have a 6800k and an MSI x99A Raider mother board.

I am trying to overclock one core to 4.3, and others to 4.2. The system crashes periodically at these settings. However I want the voltage to remain at adaptive mode so that the CPU mainly runs at stock voltage when not under load to preserve its longevity. Normally it will run at 0.75V, going to 1.24 or so when under load.

From what I read, these occasional crashes are due to not enough voltage. So is there a way I can stabilize this overclock without having a static voltage value?

Thanks.

Get an Asus motherboard. Better power delivery.