Hi, I just got a 6700k ES(Engineering Sample) like few weeks back and every 1 or 2 day I get a BSOD of WHEA_UNCORRECTABLE_ERROR in Windows 10.

Spec as followed:
i7-6700k Engineering Sample (3.4Ghz default @ 1.187V)
ASUS Z170m
1x 16GB Kingston Value 3400 DDR4 RAM
Zotac GTX1060
CoolerMaster Vanguard 850W

I started off with stock BIOS settings and still it BSOD.

I tried different settings, like bumping up voltage such as running 3.6Ghz/3.8Ghz @ 1.35V which is a higher voltage considering a stock i7-6700k should run at 4Ghz @1.2V. I ran Prime95 for 30 minutes and it's all good but it BSOD on random task like browsing web site/play youtube etc(surprisingly it rarely crash when gaming)

So my question is, can I run at a higher voltage but at a slower clock? Or will that cause stability issue? And if any of you happen to have this ES(2.6Ghz version) which I got from a LYN forumer in Garage Sales, what sort of settings are you guys running on?

Thanks.