Help: PC Intermittently Shuts Down While Gaming


New Member
My PC intermittently shuts down (i.e. no blue screen or wind down - just POW... right off) while gaming and almost only when I play Overwatch.

It runs my Oculus Rift and Star Citizen (graphically intensive games), just fine.

I have been sluthing a solution for almost a year and nothing has solved it. I was thinking drivers, software clashes and have moved to digging into hardware. It COULD be heating/overheat but temps are generally good (although I just have my company's IT dept look at it and then reseated the cpu fan with new thermal paste but it is now running at 100°C :(. Parking that for a minute, because these shutdowns were happening prior, any thoughts on which component may be the culprit? Do I need a new CPU? new CPU fan to increase cooling? New PSU? I don't want to buy new components unless I know its the culprit. My motherboard, i7-47770 and RAM are 7+ years old. My Corsair HX850 is about 4 years old and my GTX 1080ti is two years old.

I did a full memtest on my RAM and they are coming out as error free after several multi-hour passes.

Any feedback would be appreciated.

I love excuse for put another $1000 into a partial new build but would like to source the shut down solution on the cheap if possible...

Computer: GIGABYTE Z87X-D3H
CPU: Intel Core i7-4770 (Haswell-DT, C0)
3400 MHz (34.00x100.0) @ 3691 MHz (37.00x99.8)
Motherboard: GIGABYTE Z87X-D3H-CF
BIOS: F8, 01/17/2014
Chipset: Intel Z87 (Lynx Point)
Memory: 16384 MBytes @ 665 MHz, 9-9-9-24
- 8192 MB PC14900 DDR3 SDRAM - G Skill F3-1866C10-8GAB
- 8192 MB PC14900 DDR3 SDRAM - G Skill F3-1866C10-8GAB
Graphics: Intel Haswell-DT GT2 - Integrated Graphics [GIGABYTE]
Intel HD Graphics 4600, 1024 MB
Graphics: MSI GTX 1080 Ti GAMING
NVIDIA GeForce GTX 1080 Ti, 11264 MB GDDR5X SDRAM
Drive: TOSHIBA HDWF180, 7814.0 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: ST480HM000-1G5162, 468.9 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: WDC WD10EZEX-00KUWA0, 976.8 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: TSSTcorp DVD+-RW TS-H653G, DVD+R DL
Network: Intel I217-V (ClarkvilleV) Network Adapter
OS: Microsoft Windows 10 Home (x64) Build 17763.1282 (1809/RS5)