Question My computer reboots in a weird way

[Mleacher]

About a week ago i was playing elden ring and suddenly the pc shutdown and when i restarted it keeps rebooting until there is no signal on the screen and the pc stops rebooting
But sometimes i turn it on and it runs perfectly from around 5 minutes to 30 minutes then shuts off again and redo the cycle

 

[rgd1101]

full system spec? include brand and model of the psu

 

[Mleacher]

full system spec? include brand and model of the psu

Cpu:intel core i5 4450
Ram:2 off brand 4 gigas sticks at 1333
Graphics card:gtx 1050ti
Mobo:idk its model i cant find it but its lenovo
Power suppply:LITEON PS-4281-02
(270WATT)
Edit: we got the pc in February so its not that old in usage

 

[Mariusglock]

That power supply cant output enough juice

 

[Mleacher]

That power supply cant output enough juice

I tried with out the graphics card same result
But i will try tomorrow as well

 

[Mleacher]

That power supply cant output enough juice

Still the same even after removing the graphics card