I just noticed there have been 3 bios updates to my board in the past two months of me owning it. The last two bios updates were on Oct 6th and Oct 11th, 5 days apart. And they both have the same notes:
"Version 1201 - 2016/10/11
STRIX X99 GAMING BIOS 1201
1. Optimize power management
2. Improve PSU compatibility
Hi,
New user here, found this thread when looking for info on my own setup's issues. So, I've got the Strix X99 myself, bought the new system in June, and am on my third 6850k. Last one died when trying to update to bios N-2 where N=1201.
I really have no idea what I was doing wrong, so can't help but think there's something about the power management updates that relates to it. First one died just doing basic surfing or something, nothing out of the ordinary in Win 10.
I have an APC Voltage regulator which is actively bringing it down from 250v to 220v, as well as a UPS in front of the EVGA SuperNOVA 1000 G1 powersupply.
I noticed that voltages would go into the high 1.3x ranges on auto, and adaptive would always give me 1.31 or so even when asking for less. So I've locked it down to 1.26 manual now, with a 42x multi. This gives me about 42c on the Package.
Also, I dialled the screws on my H115i cooler out by a third of a turn as well, in case the pressure was somehow too high. Hopefully this will prevent a third failure. I've never had so many problems with a PC build. Old 2600k system is still ticking along nicely at 4.4ghz.
Other components include 980 SLI, Soundblaster ZXR, 32gb (8x4) G-Skill @ 3200mhz, Samsung Pro 950 / 512GB.
Edit: Adding a picture of my build.