Why does the computer restart for unknown reasons?

Question

Iron

Good afternoon, forum users. Trouble happened to me.
Since about November last year, my computer has been rebooting while I'm playing games, no matter what they are on demand. Computer hardware: CPU : AMD FX-8320 Video: R9 Radeon 270X Hard drive
: ST2000DM001 1ER164 ATA Device Motherboard: Gigabyte GA-970A-D3 Power supply: 700W Logicpower PSM-ATX-700W RAM: Kingston HyperX KHX1886C9D3 4GB x2
It would be possible to blame everything on overheating, on swollen capacitors, etc., but the temperature of the processor does not exceed 54 degrees during a stress test, the video card is also about this, the memory is brand new, it works stably, I bought HHD only in winter, but there are no swollen capacitors on the motherboard, or in the power supply. The network filter is worth it. There were suspicions on him, changed, did not help.
Actually, during these 7 months, I decided to test how my computer behaves under different loads using Battlefield 3/4, World of Tanks and Civilization 5.
In the case of Battlefield 4, here it worked incomprehensibly from the first days - it could until the reboot \shutdown work 10-90 minutes. Now you can go in for a maximum of 30 minutes.
Battlefield 3 has been stable. Recently started restarting my computer.
World of Tanks could play for a maximum of 30-40 minutes at medium-high settings.
Civilization 5 all these months (except April-May) worked stably. And he started punching. Can last from 20 to many hours, but often resets after 20 minutes.
What is the problem?

Answer 1

Perhaps there is not enough power from the power supply at peak loads.

Answer 2

go through the list in any order (suddenly something was not done)
1. Viruses (check additionally, for example, cureit and a scanner from Casper).
2. Checking the hard disk for errors
3. Checking the RAM
4. Monitoring the temperature during the game from the log records to find out the sensor readings at the time of the reboot.
5. disable automatic reboot on BSOD. Check in which module the error occurs, if any.
6. Examine the windows logs: at least application and system for warnings and errors.
7. I hope you have updated Windows and antivirus
8. Enabled firewall.
9. Check (and suddenly) planned events.

Answer 3

You can also plug a multimeter into a free molex from the power supply and measure the voltage (+ 12V and + 5V) under load. Maybe the PSU does not pull at high loads.

Answer 4

> the memory is brand new, it works stably
And what about the old one? I would take some video and memory from my friends for the test, try it with them. Recently there was a case when they bought a vidyukha for 20k, everything started exactly the same as you described, in the end it turned out that the RAM did not pull, they went and changed the vidyuhi and the RAM, now everything flies.

Answer 5

Does it give bsod on reboot? run the BlueScreenView program (this is a program that shows a list of BSOD errors and indicates the file that affected it), maybe it will give you a direction for troubleshooting.