PC randomly restarts

[memorykart]

This happens constantly and randomly, I hear a clicking sound then the PC instantly turns off and on again as if i pressed the restart button on the case, this happens even if I’m not doing anything on the pc it sometimes happens right after i move my mouse after startup. I’m not sure if the problem is in the psu or cpu, I did the psu pin test and it started up normaly. I’ve ordered new components to upgrade my pc and im planning on using the same psu so I need to determine whether its faulty or not.
Current Specs:-
PSU: Evga supernova g3 650
GPU: Nvidia gtx 950
CPU: Intel Pentium G620
Mobo: Gigabyte GA-H61M-S2P
Ram: 4gb kingston

 

[panathas]

It's probably the PSU or the motherboard. The PSU pin test isn't reliable. It only tells that the PSU isn't dead. However it can't tell you anything about the PSU's true condition and it's ability to properly power a computer system without stability issues. The only way to know that is to test your system with another PSU. If it works then the PSU is bad. If not then the motherboard is failing and needs replacement. Good luck.


EDIT. There is also a small chance that something else is responsible like the graphics card or RAM. However you should always start your troubleshooting efforts from the PSU and then proceed to the next most likely suspect (the motherboard). Testing the graphics card is easy, you should just remove it and test your system without it. In order for this test to be reliable though you have to be certain that the PSU is OK. Testing the RAM is more tricky especially if you only have one RAM stick.

 

[memorykart]

It's probably the PSU or the motherboard. The PSU pin test isn't reliable. It only tells that the PSU isn't dead. However it can't tell you anything about the PSU's true condition and it's ability to properly power a computer system without stability issues. The only way to know that is to test your system with another PSU. If it works then the PSU is bad. If not then the motherboard is failing and needs replacement. Good luck.


EDIT. There is also a small chance that something else is responsible like the graphics card or RAM. However you should always start your troubleshooting efforts from the PSU and then proceed to the next most likely suspect (the motherboard). Testing the graphics card is easy, you should just remove it and test your system without it. In order for this test to be reliable though you have to be certain that the PSU is OK. Testing the RAM is more tricky especially if you only have one RAM stick.

Should I test the psu on my new mobo, ram and cpu or would that risk destroying all the components incase its faulty. Thank your for the quick reply

 

[panathas]

If the PSU is faulty, there is a chance that it may damage new components. However in your case that chance is pretty small because your current PSU is a pretty good model, and it has all the required protection mechanisms in order to prevent that. With that said, if you have access to another PSU (maybe from a friend), test your system with it, it may save you time and perhaps money since you are getting a new system and want to avoid future headaches. Also if your current PSU is proved to be faulty you should RMA it and you should have a "good" brand new PSU to go with your new parts. Good luck.

EDIT. Looking again at your parts, the PSU seems to be the newest part and it's from a very good manufacturer. On the other hand your other parts are pretty old, especially the motherboard and CPU, and since older parts fail more easily it's probably the motherboard responsible and not the PSU. If I were to guess, I'd say 60% the motherboard (or CPU), 30% the PSU, and 10% something else.

 

[memorykart]

If the PSU is faulty, there is a chance that it may damage new components. However in your case that chance is pretty small because your current PSU is a pretty good model, and it has all the required protection mechanisms in order to prevent that. With that said, if you have access to another PSU (maybe from a friend), test your system with it, it may save you time and perhaps money since you are getting a new system and want to avoid future headaches. Also if your current PSU is proved to be faulty you should RMA it and you should have a "good" brand new PSU to go with your new parts. Good luck.

EDIT. Looking again at your parts, the PSU seems to be the newest part and it's from a very good manufacturer. On the other hand your other parts are pretty old, especially the motherboard and CPU, and since older parts fail more easily it's probably the motherboard responsible and not the PSU. If I were to guess, I'd say 60% the motherboard (or CPU), 30% the PSU, and 10% something else.

Thank you for your input, I just finished putting together my new PC and it seems to be working fine with the same PSU. Again thanks for the help and quick replies.