I have tested almost all the algos.
So far the most unstable are x16r and bitcore. They always crash or restart my compter.
all the other algos are running fine on +150 core and +500mem.
Also i am using nhsr miner for neoscrypt and its not crashing.
tested on nvidia 1070ti and 1060 6gb.
Two things to try. If using MSI Afterburner, try switching to Gigabyte Xtreme Gaming Engine. Second try reducing core to +50.
And/Or try manc's suggestion. I haven't tried myself yet.