Ok, afterburner.
Less than ideal to use that imho, any application can crash, what damage can happen if afterburner crashes? I'd rather not find that out the hard way.

Did you spot in 11.7, Nvidia temperature control is now supported?
 added temperature management and overclock support for recent Nvidia cards in Windows: "-tt", "-powlim", "-cclock", "-mclock", "-tt", "-fanmax", "-fanmin" options are supported for Nvidia too.

I'd suggest using it. That way, if claymore crashes, (no more work is pushed to GPUs), and at least your GPUs revert to bios control, cool down etc.
Right now, if your afterburner crashes, and claymore carries on, you're going to potentially cook those cards, or force them to their hardware trip point, (probably something scary like 100C plus).

Good  luck.