Computer Shuts down randomly.?

Question

Ok this this situation is kinda hard to replicate and could take ages to diagnose. I need my pc for work among other things, thats y i cant take to a shop and have see if one of u could help me out.

Basically after about 8-20hrs+ of the computer being on its will shuts down randomly and reboots. Some days it wont do it, but for the most part it will. When it does happen, occasionally it will start up for a second (literally for a second) then stop and wont reboot untill i switch off the PSU. I believe because of this it is not the OS.

Also when this happens, i will often go into the bios to check the cpu temp. It never seems to be overheated, sitting at between 30-40 degrees celcius.

With all that in mind, it leads me to believe that the motherboard is shorting out. Anyone agree or have any other idea?

Additional info.

10 months old.
CPU: i7-2600K (hasent been OCd yet)
GPU: AMD HD6990
RAM: 8gb 1600
Mobo: Asus ROG Maximus IV Extreme-Z
OS: Windows 7 pro
PSU: Corsair AX1200
Other: Xonar Essence STX (sound card)

Answer 1

try running prime95 with coretemp on.

http://files.extremeoverclocking.com/file.php?f=205

coretemp

http://www.alcpu.com/CoreTemp/



it shouldn't get hotter than 65C for the cpu.

afterwards try this.



monitor the 6990 temps via MSI afterburner while running Furmark.

http://download1.msi.com/files/downloads/uti_exe/vga/MSIAfterburnerSetup224.zip

furmark

http://www.geeks3d.com/wp-content/plugins/download-monitor/download.php?id=299



make sure to tun the the multi-gpu version,and do the steps described in this forum prior.

http://www.geeks3d.com/20101209/tips-how-to-enable-sli-and-crossfire-support-for-opengl-applications/

6990 shouldn't get hotter than 90C.



furmark can also test ram.





also make sure that there isn't excessive amounts of dust,a little is fine,but a lot could cause issues.

Answer 2

First thing to try is over heating. Just because it doesn't say it is in the BIOS doesn't meant that a part of it isn't over heating. The BIOS heat monitor is very basic and can miss problems like this. It might not be the mobo that's over heating. My advice is to get a desk fan, open the case, and have the fan pointed in there all day and see if it still happens. I know my computer has a very similar problem (actually sounds exactly like your problem) and I have to use a desk fan to keep it cool for whatever reason (the case is very well ventilated).



Other components malfunctioning generally won't make your PC shut down after 8-20 hours, often times it'll be quick or rare (i.e. it shuts down after 10 minutes every time or only happens once a month and never at the same time). The third thing it might be is drivers. Update your soundcard drivers and your video card drivers, as those two can cause problems with the computer working correctly.



Hope this helps!



EDIT: DO NOT CLEAN YOUR RAM AS THE OTHER PERSON SAID!! You can easily ruin your RAM if you try to clean it! If you open the case and there is dust, use canned air and only canned air to clean it!

Answer 3

Is the CPU temp you only check? It could be your RAM if it was the hard drive the computer would have gone straight into bios and would have given you an error message. The reason why the RAM is because when you boot up windows ( not the computer just windows ) every single random thing you do on your computer it is stored in your RAM until you close off the specific program hence the name RAM ( Random Access Memory ). There is no way its the motherboard, if it was the computer wouldn't even turn on,



Good Luck!

Answer 4

Hey friend, your computer overheating can be a number of things including:

1: You could have Dust inside the case If this is the problem, turn off the computer and check inside the computer case to see if there is any dust. Before touching inside the case, be sure to touch the outside to dissipate any electricity.

2: It is possible you have viruses and if you do, try downloading reimage repair or PC cleaner pro.

3: Hardware could be another issue and a good way to detect is to open up Device manager and Click on all of the + signs and if you see any question marks or other suspicious signs, you will know the hardware problem you have and the corresponding hardware component you will have to replace.

Answer 5

You appear to have hardware compatability problems. Install your old RAM to see if the computing device stablises, if this is the case then your new RAM is inaccurate or the improper spec for your pc. Do not mix speeds or varieties of RAM. Additionally check you laptop is not overheating, it is usually shutting down due to the fact that the CPU sensor within the BIOS is defending the CPU from frying.