Good morning,
My HTPC/NAS just shut down while watching home made movie.
About the system
Case Silverstone HTPC case. position vertical.
CPU i7 5960X not overclocked.
Motherboard MSI X99A SLI Plus.
Memory Gskills
GPU one Zotac Nvidia 970
HDD 2x8GB in RAID 1, 3x4GB in RAID 5, 1x 6TB not raided. The RAIDS are software RAID by Ubuntu dmraid Ubuntu is 16.04 LTS.
PSU Seagate Prime 800 W.
Cooling liquid cooled Corsair 80 with industrial noctua 1000rpm fan installed on one side.
So while watching the video, I notice the video would pause, but the running time is still going, while the audio is stilil going. A bit later there would be green dots and the video would catch up.
An hour or so into the film, video stops completely while the sound goes weird like bu bu bu bu bu bu bu for maybe 15 seconds and the system shut down.
So I figure no sweat, happens all the time and push the power button again. Fans spin for half a minute and shuts down. I touch the base of the case (Where the CPU is on the mobo. and the memory. It's warm to hot to the touch.) The Postion where the HDDs are cool to the touch. I put my fingers on the liquid coling sink and it's tad warmer than the HDD, but nowhere near the mobo.
Same with where the Graphic Card is located.
TL;DR:
System shuts down and won't start. Motherboard overheat where the CPU and RAM is located and nowhere else. Liquid Cooler cool to the touch. HDD and GPU cool to the touch.