Core i7 2600k strange behavior?

Question

Iron

I have a Core i7 2600k and the mother Asus P8 H77 pro freezes
without loading the PC, and sometimes the USB power just falls off at first. After switching on, the time is set to the year 2000, but the BIOS is not reset.
Under load (in games), sometimes USB devices are reconnected (mainly keyboard and / or mouse).
If you load one core with winrar, then the computer does not hang, USB disconnection is not noticed, but sometimes the time goes astray (only for a couple of hours). With multithreading - everything seems to be in order.
Similar nonsense was on the Gigabyte Z68X-UD4 B3.
I tried to change the PSU (2x450 and 1x750)
Vidyaha - oven 480.
Memtest says everything is ok.
Power saving settings don't change anything.
Tuboboost - does not affect.
Acceleration has no effect.
The symptoms are the same.
Tell me what could be the reason?

Answer 1

Try to weed out everything, leave for example: CPU-HDD-RAM and run. Use the built-in video card.

Answer 2

Well, try to install a stabilizer, check the sockets, there may be strong noise in the network, try to connect it in another place. Whose power supplies, test on a quality, not a Chinese craft.
Again, when the strange behavior appeared, how long did the computer live before the behavior began.
I somehow remember that the video was strangely buggy, of course it was immediately clear, but the symptoms were strange, there were glitches during idle time, and it worked perfectly under load, as it turned out, the temperature sensor built into the chip was buggy, the percentage began to throttle. At work there was a server, as they put it in a collocation, it was so buggy (it cooled well), it didn’t bug in the office, as it turned out, the chipset suffered from a freezing disease. Here the solution to the problem is akin to shamanism, try slowing down the fan on the cooler or changing it to a weaker one, see how it will idle, monitor the temperature, again, a hardware monitor in the BIOS can help, look at the power and compare with the required one.
In this case, I had a problem with power supply, but it was related to a dusty PSU (but there may be a network problem, as I said above), the hardware monitor showed a problem, instead of +12 it was +10.9, instead of +3.3 it was +3.1 etc.

Answer 3

Try a known working mother

Answer 4

> Acceleration - does not affect.
And if you lower the frequency?

Answer 5

If possible, insert another processor into the mother. Maybe just an incompatibility. Or maybe the memory is failing.

Answer 6

If the time is lost, then these are problems either with the battery - as it is discharged, the time begins to suffer first, and then only the settings, or a chipped chip where this time is implemented - usually this is a rather large BGA chip that, in addition to time, performs a lot of functions and its failure can be reflected for example, on the data exchange via the PCI bus, which already leads to visible failures.
Once a laptop fell into my hands - it turned on only after warming up and multiple attempts to turn it on, they thought it had already “arrived”. But they said that a month before that, the time began to fail - and it turned out that after replacing the battery it began to turn on and work normally. those. from a battery that supports BIOS settings - a lot can even depend.

Answer 7

BIOS versions latest?