PC temperature related shutdown

[DemonDriverDan]

Hope there is someone here who could help me out. My home-built PC has been running fine generally until about summer this year when on the really hot days it would shutdown when I was gaming. After a shutdown it would immediately restart and work fine again unless I stressed it out with games. As it got in to winter and I started turning the heating on it started doing it again (note: the PC is next to a radiator), only while gaming and only while the heating is on. However it's started getting worse and will shutdown when just browsing the web while the heating is on.

I tried taking off all the panels of the case and that hasn't really helped, as well as cleaning out all the filters. I've also monitored the temps of the CPU / mobo / GPU and nothing seemed extreme.

Most recently it's stopped starting up again after a temp-related shutdown. It'll go through POST and I can access the BIOS with no issue but soon after it starts loading Windows it'll shutdown again. If I leave it some time to cool down it'll start up again. When it gets stuck in a loop I looked in the BIOS at temps and the CPU / mobo were values were 29 - 40 degrees so nothing extreme at all.

Anyone have any ideas at all? I'm a bit stumped on this one, it seems as though something in Windows is unhappy about the state of the hardware but I can't figure out what.

Spec is:

be quiet! dark base 900 case
i7-6700K
Asus Maximus VIII Hero/Alpha mobo
Corsair H115i CPU cooler
Samsung 950 M.2 SSD
Gigabyte GeForce GTX 1070 G1
Corsair Vengeance LPX 16GB

[Oakey]

Is your heatsink and fan seated correctly?

Is it clogged with dust?

Have you used something like MSI Afterburner to monitor your CPU temps when gaming?

Have you checked the BIOS to see if it's set to shut down at a certain temp, is this temp too low?

[DemonDriverDan]

Oakey said:

Is your heatsink and fan seated correctly?

Is it clogged with dust?

Have you used something like MSI Afterburner to monitor your CPU temps when gaming?

Have you checked the BIOS to see if it's set to shut down at a certain temp, is this temp too low?

Haven't checked if they are seated correctly as CPU temps were around 40 - 50 during gaming and nowhere near that at idle when it shutdown.

Not clogged with dust, it was but I cleaned it out.

I have Corsair Link on that I've been using to monitor temps.

I think the BIOS is set to shutdown at 80 or so, so shouldn't be an issue.

Thinking about it, the one thing I haven't checked is if the H115i's rad is full of dust. There was some on the top that I cleaned off but I haven't checked inside the fins.

[snuffy]

I'm a bit confused here;

If you are seeing CPU temps of no more than around 50 then why do yo think it's shutting down due to excessive temperatures ?

However, ignoring that for a second; When it shuts down, feel the pipes on the cooler. If one is hot and one is cold I'd say it's likely that the pump is not spinning. Note it seems that the pump speed that Corsair link reports is the speed demand and not the actually speed.

My CPU was getting very hot with a 3 year old 80i cooler. All of a sudden the fans would speed up and CPU would read over 70 when on idle. Give the case a whack and see if it brings the temp down (i.e. that might free the pump).

[chris285]

You need to monitor but i have a feeling it is not temp related, i have a 5yr old H100i on my 6700k running at 4.2ghz and it's idling 20-25 right now and goes to 50-60 under load so it's capable

also gaming tax's the GPU more than the CPU generally, i'd get cpu-z and gpu-z installed and do some stress tests of each and see if that highlights where the fault lies

[dogbucket]

Sudden unexpected shutdowns, (ie like you just pulled the power out) can often be the PSU failing under load or heat.

Subsequent problems getting windows to boot is probably just a result of the file system getting corrupted due to improper shutdowns.

[roadsmash]

Take the graphics card out and use the 6700k’s Intel Graphics, see if it does the same crash while browsing the web.

If it does, test the memory using memtest.

If no errors, replace PSU.

Unlikely to be a mobo or heat issue IMO.

[7w7]

I had the same symptoms. Cause was overheating PSU - fan was blocked from spinning.