[SOLVED] Pc keep shutting down

[Syedhamza15]

I bought a board and processor just a few days ago it was alright at first but now when i am playing heavy games like rdr 2 and COD Mw for like 50-60 min it powers off for 1-2 sec and powers on automatically. In normal usage or when i am play CSGO its working flamelessly. And now after i shut it down 2-3 times it just dont power on. So Everytime i had to remove Cmos battery and put it back in. I tried replacing it but same problem. And also updated bios. Is it a faulty motherboard?
Specs:
Cpu: Xeon e3-1246 v3
Mobo: msi h81m-p33
Gpu: Rx 580 8 gb
psu: Coolermaster 550w
Ram: 16gb

 

[Syedhamza15]

How are temps?

How are temps?

Gpu max temp 77c on full load
Cpu max temp 71c on full load.
Ambient temp in my room is 33c

 

[Syedhamza15]

This is strange
You say that it happens only in heavy games
Do you know how much power your pc is drawing?

i am not sure about that but i was using same specs for past 2 years same psu and same gpu. i just changed board and cpu. and since then i am having this problem. i think 550watt psu is enough for this build. and i dont think this not powering on until i take out cmos battery and put it back in problem is causing by psu?

 

[Syedhamza15]

Yeah I think so too,
Do you overclock? If so, to what clock speeds?

nope no overclocking.

 

[Syedhamza15]

When your computer randomly reboots, are there any post codes? Any beep codes? BIOS Errors? Or is it all fine?

nope nothing. just randomly completely powered off and then boot up just fine as if nothing happend.

 

[Syedhamza15]

hmm
Did you buy the mobo online and have it delivered, or did you buy it at retail? It could have been damaged, Have you tried a different mobo?

I bought it online.