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PC Shutdown problem
show user profile  mike_renouf
I suspect I know what's causing this, but came to the experts for some better input.

My PC generally runs fine but when I play Mechwarrior Online it shuts down randomly. No other programs seem to cause this. I don't run any other games, but I render a lot of scenes in vray, this is what leads me to think its related in some way to the GPU.

I suspected initially that something was overheating, so I cleaned all the dust out of the case, graphics card and had the CPU reseated with new thermal paste. This has done nothing to prevent the shutdowns which were occuring once every 4 or 5 hours. Then they happened once every 45 mins or so, now they happen pretty much every game.

My system spec is as follows:
MSI motherboard
Zotac GTX470
i7 (can't remember the actual chip designation, will check.

Since the MSI Afterburner software seems to indicate that the CPU temperatures are fine, and the GPU is running at around 70-75 degrees C under heavy loads, I'm guessing that the root cause might be my cheap power supply which is not feeding the graphics card's demands properly. I know the graphics card needs at least a 550W PSU, and the PSU I have currently runs pretty hot.

Before I go out and spend a load of cash on a new PSU though can someone more knowledgable let me know their thoughts?

Many thanks!

read 946 times
6/22/2015 2:45:37 PM (last edit: 6/22/2015 2:45:37 PM)
show user profile  Nik Clark
Have you looked in the Windows event logs to see what was reported at the time of the shutdowns?

I also suspect your PSU.

read 944 times
6/22/2015 2:47:57 PM (last edit: 6/22/2015 2:47:57 PM)
show user profile  Darius
I noob,but. I would like to ask you to test few things. When you are running Mechwarrior,see which part its using most(CPU,GPU or even ram)? To monitor processor and gpu temperature use HWmonitor and see if they are exceeding the limits of your processor or gpu. If not then try with 1 ram in a slot and then run the pc and then see if there is any problem. If its still not fine then you must go to its Doctor/service center. Cause you cant try with other gpu or cpu so there is no way.

But,mostly,it looks like a PSU problem.One question.Did ya overclock the cpu(Though you didn't mention that)?
read 919 times
6/22/2015 5:00:08 PM (last edit: 6/22/2015 5:01:06 PM)
show user profile  mike_renouf
Cheers guys.

Nothing in my system is over clocked. I'll have a look at the windows event logs tonight if I can. As I said, the GPU was running at about 70-75 degrees. Not sure about CPU core temps, but I can check again.

read 912 times
6/22/2015 5:40:45 PM (last edit: 6/22/2015 5:40:45 PM)
show user profile  Sangre
When my PSU was dying my PC was randomly shutting down as well, but I had to wait for some time before I could turn it back on. How old is your PSU? Some one told me they usually have a life span of 6 years.
read 898 times
6/22/2015 6:16:03 PM (last edit: 6/22/2015 6:16:32 PM)
show user profile  ScotlandDave
It does sound at a glance like the psu.. The extra draw from the gpu running in full schwing whilst gaming as well as any hdd reads etc could push it over the edge..

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read 862 times
6/23/2015 11:17:56 PM (last edit: 6/23/2015 11:17:56 PM)
show user profile  Mr_Stabby
The PSU would be the obvious suspect. PSU's aren't really limited below a certain wattage (well technically most of them have a fuse at the input but thats way beyond other points of failure) but what happens is that the voltages drop as you draw more out of it and either the gpu or cpu regulators cant keep up which causes instability in either which causes bsod which defaults to shutdown on default configurations.

PS! psu's certainly aren't limited to 6 years, you just have to account for capacitor degradation which in most cases means ~20% power loss per every 5 years. More reputable PSU manufacturers actually pack extra watts to take care of that for the duration of whatever their hardware warranty is so a 800w high end silverstone could actually pump out 1000w fresh out of the package for example.

read 852 times
6/24/2015 3:11:57 AM (last edit: 6/24/2015 3:11:57 AM)
show user profile  mike_renouf
Thanks guys. I did a check of the windows error log and it did indeed have a bunch of reports on Power Kernal failure, but nothing about graphic driver crashes, memory errors, or application crashes. I suspect then it was a straight power cut caused by the PSU failing.

I'll be investing in this I think:

read 816 times
6/24/2015 4:31:48 PM (last edit: 6/24/2015 4:31:48 PM)
show user profile  mike_renouf
Went for the corsair cx750. Somewhat cheaper but was in stock at local PC store. Been dicking around on mechwarrior for few hours now and looking solid :)

read 767 times
6/26/2015 10:47:56 PM (last edit: 6/26/2015 10:47:56 PM)
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