overheating PC
 

Hi,

I've been trying to run some mersenne.org work on an AMD FX-9370 8-core
machine (photo attached).

[URL]http://www.mersenneforum.org/attachment.php?attachmentid=19015&stc=1&d=1535719832[/URL]

There a bit of a story to it.

I was using a Gigabyte 990FXA-UD3 motherboard and then after deciding to put everything in a new case, the sockets on the I/O panel suddenly stopped working.

I like things to work so I eventually got the money together to buy a new motherboard that would work. The one I got is a GA990-XA UD3. Things are back in working order.

The problem I've got with it is that 5 minutes after prime95 starts up the computer switches off.

I'm 99% sure it's because it's overheating. Coretemp says the CPU's at about 67C before shutdown.
The cooler I have is Noctua which can be seen in the photo. It's a good one. I've got just the four case fans at the front of the case.

Perhaps I could install some more fans but I don't think it'll help.

I've been thinking about running the whole thing in a freezerbox.

Can anyone offer any helpful advice?

Are the fans and fins clear of dust? I have been using a combination of vacuum and a brush, and compressed air can recently to clean my computers. Your PSU looks dusty. Maybe you give it a blast to clean it up. BTW what is the make and model of the PSU?

Dust it!

If you have a vac with a hose, try using that in one hand and a can of spray air in the other.

Check electrolytic capacitor(s) on motherboard.
If their top is not flat, they are not good.


[URL]http://www.robotroom.com/Parts/Samsung-monitor-capacitors/Spot-the-bad-capacitors.jpg[/URL]

[QUOTE=wildrabbitt;495007]I've been thinking about running the whole thing in a freezerbox.[/QUOTE]

Surely this will cause condensation and would be a very bad idea.

67C doesn't sound like a crash-worthy temp. I ran chips in that series, including a 9370 at the end of my AMD period. Those things produce a lot of heat, but cooled easier than the i7-6700K I am running now. My belief is that the much larger die on the FX has better transfer to the heat spreader than the Skylake chip. I don't remember for sure the high-end temps for the AMD chips, but I am pretty sure that mine ran [U]at least[/U] at 70C without problems. That cooler ought to be up to the job if it is clean, and the TIM well applied.

Is this a recent build? Has it acted this way from the first? Does it shut down "reliably" when it hits 67C?

EDIT: What is the PSU rating? I think that's a 140W chip. Are you running GPU compute, as well?

I would recommend replacing the PSU. Does the PSU fan sound ok? Is the PSU too hot to touch before the shutdowns?

One other thing: double check the connection between motherboard, chip and heatsink/cooler fan. Fresh contact paste might help. I had a mobo/heatsink combo once that required a bit of jiggling to get the heatsink to sit smoothly on the cpu. I doubt this is the problem, since your cpu temperatures don't seem that high.

I can answer these two questions now.

[QUOTE]BTW what is the make and model of the PSU? [/QUOTE]

Corsair VS 550. It's not as long as the black oblong at the bottom of the case. That's just part of the case. The actual PSU can't be seen in the photo.

[QUOTE]Is this a recent build? Has it acted this way from the first? Does it shut down "reliably" when it hits 67C? [/QUOTE]

No it's not a recent build. I used to run it with a different PSU and someone on these forums suggested buying a corsair one because I was having problems back then. The power socket on first motherboard I was using melted. This is the third motherboard I've bought for this chip. By the way it's a 9590 not 9370 like I first said.

Bear with me, I've got to carry out the suggestions given in all the replies.

Good luck! Keep us posted.

[QUOTE=kladner;495022]67C doesn't sound like a crash-worthy temp. I ran chips in that series, including a 9370 at the end of my AMD period. Those things produce a lot of heat, but cooled easier than the i7-6700K I am running now. My belief is that the much larger die on the FX has better transfer to the heat spreader than the Skylake chip. I don't remember for sure the high-end temps for the AMD chips, but I am pretty sure that mine ran [U]at least[/U] at 70C without problems. That cooler ought to be up to the job if it is clean, and the TIM well applied.

Is this a recent build? Has it acted this way from the first? Does it shut down "reliably" when it hits 67C?

EDIT: What is the PSU rating? I think that's a 140W chip. Are you running GPU compute, as well?[/QUOTE]

Fairly sure that fx is a 220W chip.

[QUOTE=xx005fs;495039]Fairly sure that fx is a 220W chip.[/QUOTE]
Oops. My bad. I still think that cooler could keep things under control. The heatsink interface and thermal compound might be contributing factors, but still, even 70C or a bit more should not cause spontaneous shut down.

Have you looked at system logs to see if there is any evidence there of what is happening?