PC running at half power! How to fix?

Question

Windows

3.1

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Composition of PC (iron):

CPU: Intel Core i5-9400K
GPU: AMD Gigabyte Radeon RX590
RAM: 16Gb (2x8Gb 2400MHz DDR4)
SSD: 120Gb
HDD 1: 1Tb
HDD 2: 1Tb

Recently, the PC began to work at half capacity. And if for simple tasks, such as browsing the Internet or working in MS Office, this is not noticeable, then with a serious load, the PC can fall into the blue screen of death at the most inopportune moment. Crashed once while playing Crysis Remastered. The second time the blue screen got out while working in Corel Video Studio. The third time the blue screen got out in Adobe Media Encoder. When you start virtualcoke - a guaranteed blue screen of death. Error codes: MEMORY_MANAGMENT, and the second one (I don't remember yet).
At what it began relatively recently.
What was done:
Memtest64 RAM check - no errors.
Checking all disks and all partitions with chkdsk - it fixed something there, but to no avail.
Cleaning the C: \ drive is also a zero result.

So what could be the matter and how to solve the problems? How to diagnose and repair a PC? Should I reinstall Windows?

Answer 1

Check the cooling of the processor and video card - banal overheating can cause this.
Whether to look a live disk - SMART to look.
See how alive BP is a banal lack of nutrition, can give the same symptoms.
Most likely power or overheating.

Answer 2

Firstly - in the "half", how is it?
Secondly, google error codes. It's easier and faster than asking general questions. For example, Google says that an error with memory management is crooked wood
. Thirdly, if such things raise questions, pay for their solution. The alternative is a watch on Google, with curiosity and recognizing oneself as a fool in service.