HWmonitor Voltage diagnosis (duno if values are correct)

You can do a basic test of a power supply under load using a multimeter.
You connect the multimeter to any spare connector coming out of the power supply with black and yellow wires. A molex connector works best - you can insert the probes directly into the molex connector pin sockets and hold them there with tape. The + goes on the yellow (12v) wire.

Then you power on the PC and observe the readings, as it starts up, once you get to the desktop, and then as you use the computer. You would want to play your game at highest settings.

The voltage should remain steady throughout, no dips or drops. A tiny 1/10 fluctuation is normal in most consumer multimeters.

A PC can shut down due to overcurrent voltage protection in the power supply, Any disruption in power flow from the power supply, CPU overheating, electrical failure on the motherboard - to name a few.

Yes, best to rule out the power supply first (or confirm a problem). Otherwise you are just "chasing your tail".

Ohhhh. No one ever has problems with laptops!

Denisgsv said:

A PC can shut down due to overcurrent voltage protection in the power supply, Any disruption in power flow from the power supply, CPU overheating, electrical failure on the motherboard - to name a few.

Dont think its overcurrent as it is occuring only during certain conditions .
CPU seems fine ... (even tested at 100% load)
And i changed motherboard , i thought it was failing .

As for voltage ingame i will give it a try , need to find a multimeter , and as ingame it lasts really little now before shutting down .

Does the Desktop PC is grounded at the wall plug? What's about electrical fluctuations in your house...

Could be a cable that touching part of the PC case or something doing statics. Check all your cables are not bended/break and well enough protect from each others.

Denisgsv said:

Does the Desktop PC is grounded at the wall plug? What's about electrical fluctuations in your house...

the first sentence , sorry i dont understand what does it mean :| its a usual wall plug , then i got the power bar in which i have attached all pc related stuff , its fixated under the table . Should have a surge protector within .

As for power fluctuations it seems fine now , tho i had likke 5-10 shutdowns during last year , was thinking if that could dmg the psu also .

When i talk about "Grounded" is that here i've got at home three cables output in the wall plug, One is grounded for protecting from electrical shocks. So the PC Case is also protected from Electrical statics/shocks and does protect you either.

A Surge protector is a good need in case of lighting thunders.

Two holes wall plugs are not Grounded to Earth...

The power bar it's self could also be a problem.
A normal power bar has little or no surge protection.
They normally have a 20 or 30amp circuit breaker.
Does this power bar have a part # we could Google.

What power supply are you getting?