PC keeps crashing after 2-3 minutes

[BennyKenny]

My PC keeps crashing when I turn it on. I think the PSU isn't good enough.

PSU: be quiet . Model Mr BQT P4 520W

Graphics card: geforce gtx 560 (Asus)

CPU: Intel i3-2100 @3.10GHz

Motherboard: Intel dh61ww

4GB ram ddr3

2x HDD TOSHIBA DT01ACA050 SCSI
I cleaned my PC of all the dust so that can't be the problem. Please help?

 

[JQB45]

How old is the power supply? A quick google search says the NVidia GTX 560 requires at least 450W but those numbers are typically unreliable.

 

[BennyKenny]

How old is the power supply? A quick google search says the NVidia GTX 560 requires at least 450W but those numbers are typically unreliable.

I got it about 2 years ago

 

[BennyKenny]

Something else... Before it crashes, I hear a buzzing coming from the PSU. Could it be broken or do I just need a better one?


Btw . I used a hardware monitor and before a crash , CPU #0, #1 ... #4 reached ( 98, 97 , 94 , 86)
Everything else seemed fine

 

[JQB45]

If the CPU cores are reaching 90C+ you have a serious problem. Under heavy load you probably shouldn't exceed 70C unless you're running Prime.
My i5-2500k with a Cooler Master 212 EVO running Prime gets up to 64C, under normal loads it never exceeds 55C.

 

[BennyKenny]

Not °c. It said 97% ... Don't know if that is usage or smth like that.

 

[BennyKenny]

So checking with my brother's PC, everything seems normal ( using the hardware monitor) . Something I've noticed is that depending on what I do , the PC crashes earlier or later. For eg: if I try launch a game, it will crash in like 1 min, but if I just go on YouTube, it'll take about 10 minutes for it to crash

 

[JQB45]

Try running MemTest86 (at least 3 passes)
http://www.memtest86.com/

And let me know if it detects any problems with your RAM.

If RAM checks out ok then remove your discrete video card and run your computer using the Intel integrated graphics (iGPU).