[topias]

hello i got a problem whit my pc suddenly my pc shuts down and will turn on couple seconds later when example gaiming or doing nothing i did couple weeks ago i buyed a new PSU cougar 700w so can this psu be faulty and i checked my computer for viruses found nothing and i checked the temps and they are fine so help me guys!!!!!!!!!!!


specs OS windows 7 64bit
GPU palit gtx 260
CPU intel core duo e8400 3.0ghz (not overclocked)
PSU cougar 700w
Memory 4gb
motherboard gigabyte EP35-DS3

[mihapiha]

Sounds like your PSU is damaged or does overheat. You may wanna clean your PC.

[topias]

theres no dust or some other crap on my case already clean it so any help?

[Elmex]

here are the steps to understad the problem

First of all download a program called "Everest", go to "Computer" and then "Sensor"
1. If any of the temps' are higher then 60C on idle, then you need to clean your computer from dust, and install new cooling on the component that is too hot.
2. If thats not it, it might be a virus. Two solutions to that. Go to safe mode (reboot and press F8 key) and leave the computer on for some time. If it does go off then you got a virus. To get rid of it follow my guide on my blog - http://canadiangamer...ost24.com/?p=30
3. If after that it still has the problem, then it might be Hardware related. I would first check the Hard Drive, it might not be connected well. Then I would check my Power Supply. Only way to do that, is to go to a computer store, that has a little machine that tests PSU's. Any computer guy that respects himself got one.

4. this is extreme stuff LOL. If none of those help this might be 1. your Operting System or 2. Hardware.
First I would check my Windows, to do that go to CMD, as administrator, and type in "cd c:\". After that type in "sfc/scannow". If it finds any problems it would repair them, but I doubt that there are such corrupted files they turn the computer off.
If that doesn't work, it might be your hardware
Replace each part with a working one, and leave on for some time. If something changes you got your problem.

WHOA

This post has been edited by Elmex: 30 December 2009 - 08:40 AM

[topias]

ok i did those the temps are ok not 60c error not found viruses not found putiit on safemode didnt shut down first shutdown was a couple weeks ago the other shutdown was about week ago and the third shutdown was yesterday and the shut down happens when i am gaiming and the shutdowns are like you take the plug of the PSU and put it back couple seconds later then click the power button to power the pc but how i can see the PSU temps cause i think it's overheating or something

[Challenger]

could it be dirty power? Does any of the other electrical equipment turn off flicker?

[topias]

no its not dirty power theres 2 other computers in this house and they didnt shut down but i think the reason of this is that my PSU got some kinda safety functions undervoltage protection,overvoltage protection,short-circuit protection,overload protection and overcurrent protection and the PSU shut down itself if theres something wrong whit the voltages or temperatures so may this be the answer for this

[dirtylarryuk]

topias, on Dec 30 2009, 03:30 PM, said:

no its not dirty power theres 2 other computers in this house and they didnt shut down but i think the reason of this is that my PSU got some kinda safety functions undervoltage protection,overvoltage protection,short-circuit protection,overload protection and overcurrent protection and the PSU shut down itself if theres something wrong whit the voltages or temperatures so may this be the answer for this

Only way round that is to have a very decent power surge protector or an actual UPS (starts from about $70+) most fo the ups devices offer very good volt sag -over protection and even warn you what is really going on.

I would RMA the PSU just to check if a new one just works!

If you get a new one and it plays up, or try the current PSU in another rig! (and it plays up in a undemanding machine) then you might have to go the UPS route! And a decent UPS starts from around £60!

But this is most probably a fault on the 12 amp rail and the gpu is causing an issue when gaming.

If the machine sit idle no issue or if you can run a CPU intentise task (NOT GPU) prime 95 and no crash) it's either the gpu is at fault or power to it.


Do reinstall the GPU and mobo drivers just in case though.

[Challenger]

I've never looked back after installing ups's on all my computing equipment. I live in a very rural area and have many power issues. Installing ups's cleaned everything up and in a power cut gives you plenty of time to shutdown your system - Just unfortunate if it happens when your sleeping as the alarms are very loud!!

[topias]

ok but thanks for the information guys

[Hikyuuri]

Sounds like a power supply issue.

Make sure the fan(s) on the PS are working. If they do not turn on when the system turns on, theres your problem.

Even if the fan(s) are working, do the following.

1. Boot the system.
2. Install OCCT (just google it).
3. Run the GPU test. Make sure you enable fullscreen and max resolution.
4. As this is running, put your hand behind your power supply. If the air coming out of it is extremely warm/hot, your PS is overheating.
5. Let OCCT run for the full hour.

Note: When you use OCCT for the graphics test, the first minute after you start the test is for monitoring only. It doesn't do anything for the first minute. After that first minute, your GPU is put under extreme load. It may not seem like it with the simple graphics that come onto the screen, but it completely maxxes out your GPU. This means that your GPU will be pulling its max power.
If the system shuts down the moment the graphics start to come on screen, its a PS problem. Either it doesn't have enough power for your system, or it has an internal problem. If it finishes the test normally, a window will appear. In this window will be .jpgs of temperatures and system voltages. Look for the 12v graph. Make sure that it didn't drop below 11.5v. If it did, its a PS problem.
If the system crashes during the test, let me know, and I can tell you what to do next.

Final note: With this test maxing out your GPU, your GPU will get extremely hot. NVidia GPUs can get upto 250 degrees F without a problem, mine get up to about 220 during this test. Just make sure that nothing is blocking the air output of the card.

Just to emphesize the amount of power a GPU pulls, let me explain what OCCT does to my system's power demand. My system has 2 GTX 280s in SLI. When the system is idling, it pulls about 450w. When I plat a game (Crysis with max settings) it pulls about 700w. When I run OCCT's grapgics test, it pulls in the range of 1000 to 1100w. Crazy, huh.

Oh, do not use the power supply test option in OCCT, sadly the GPU test pulls more power.

Hope this helps.

[topias]

Okay well the computer doesnt shutdown like everyday but it will couple days later like 4 or 3 days later there will come a shutdown they like happen even i just opened the computer and go to play some games and BOOM it will shutdown and restarts and the psu isnt even hot.After the shutdown i can play games and it doesnt shutdown sometimes it will shutdown mornign or evenign or night they are just random shutdowns but i will RMA the psu and get a new one see whats happen.

[topias]

Well i did check some voltages heres results
CPU core=minimum 0.96 maximum 1.14 average 1.00
+3.3V=minimum 3.31 maximum 3.31 average 3.31
+5V= minimum 4.87 maximum 4.89 average 4.89
+12V=minimum 0.96 maximum 3.14 average 1.30
so i think that +12v is too low dont you think cause stable shoud be minimum +11.40v and maximum +12.60v

[topias]

ok i did run occt and it did run normally and didnt crash and there wasnt any 11.5v on the graphs so any other ideas

[Hikyuuri]

topias, on Jan 6 2010, 09:48 AM, said:

Well i did check some voltages heres results
CPU core=minimum 0.96 maximum 1.14 average 1.00
+3.3V=minimum 3.31 maximum 3.31 average 3.31
+5V= minimum 4.87 maximum 4.89 average 4.89
+12V=minimum 0.96 maximum 3.14 average 1.30
so i think that +12v is too low dont you think cause stable shoud be minimum +11.40v and maximum +12.60v

Sounds like whatever software you used to check the voltages wasn't reading the 12v properly. It wouldn't be the first time I have seen this happen.

All the other voltages appear normal. 5v may be a little on the low side as it never gets above 5v, but again, that could be the software not reading it properly.

When you used OCCT, did you notice under Monitoring that it has CPU temp, GPU temp, aand system voltages? Is that what you used to check the voltages?

[topias]

i used the program named everest to see the voltages but i did look the right voltages from bios and they were stable

[topias]

so i did change the psu for my old 500w and ive been using my computer about 2 weeks and no shutdowns so it was the psu i think i did RMA the 700w i think i get a new one soon

[topias]

so iv'e finally got my new psu 700w but after installed it and pressed the power button the computer goes on normally but couple seconds later it goes of and goes on again andshutdown again i checked the wires and the other stuff and they were fine but so i decied to put the old 500w back on and suprise it goes on normally and no shutdown restart so did i again get shity PSU or what psu is the same name cougar and same model 700w so help shoud i get it back into the store and buy a corsairs PSU?????????????