PC freezes at random times, what could be the reason?

Question

Iron

OC: Windows 10 Pro
CPU: Intel Core i5-4440
RAM: 8GB
Motherboard: MSI B85-G41 PC Mate
Hard drive: WDC WD10EZEX-75WN4A0 (1 TB, 7200 RPM, SATA-III)
The essence of the problem : the PC started to hang tightly in random moments, if a sound plays during a freeze, then it also freezes (sorry for the tautology :)). There have never been such freezes on this system before.

• It all started with updating Windows to 1803 (May 30).
  
• It continued with a burned-out video card, instead of a password entry screen, a black screen began to appear (May 31). This is not the first time I've had problems with it, so it's not surprising that I decided to switch to the integrated video card (Intel Graphics 4600).
  
• The PC hung out of the blue a couple of times, decided that it was the drivers for the integrated graphics that Windows found, manually installed the latest drivers suitable for the hardware, the freezes stopped.
  
• And so, on the night of May 6, the PC again hung in the same way.
  

When I got to understand what could be the matter, I found that the temperature on the south bridge is constantly around 50 degrees. Regardless of the load, whether during idle time or during the test of the entire system by Aida64. Is this temperature normal? I've never paid much attention to this sensor before. The UM itself is located directly below the video card slot, that is, next to its cooling system (there is no more video card, could this be the reason for the temperature rise?).
During the GPU stress test by Aida64, the picture was constantly frozen, performance graph:
.
That's what, in fact, now the question is - do I need to additionally configure the integrated graphics through the BIOS and can such freezes occur due to incorrect settings?

Answer 1

Apparently problems with mat. payment.
Maybe the conders are swollen, maybe the bridge is buggy.
In general, during operation, such a temperature of the bridge is quite a normal situation, but in idle time it should not heat up so much.

Do I need to additionally configure the integrated graphics through the BIOS and can such freezes occur due to incorrect settings?

No.

Answer 2

In descending order of probability of causes:
1. Overheating. Proc normal?
2. The motherboard dies. Chipset and/or power circuits.
3. Power supply.
4. Memory. Unlikely, but sometimes it happens.

Answer 3

50 normal pace. During stress tests, everything is always stupid. And you did not even try to demolish Windows. You sit on the top ten, update yourself, and think everything should be okay. Take it down, it's the first and easiest thing to do. I had this, I bought a used motherboard, and the game alone hung when I went into the settings, the blue screen without inscriptions and the sound hung (looped), I could not understand anything, then I reinstalled Windows, installed the driver from the official site, everything is like it was necessary, and it began to work, it still plows. And normal people turn off auto-update, it’s useless to ordinary users, only one harm.
And yes, check for overheating percent, the same stress test in Hades.