i think my psu is on its way out but not sure

[woppy101]

i think my psu is dead or on its way out but im not sure i will be sitting on my computer then all of a sudden it will switch off like there has been a power cut this happend 6 times yesterday and twice today and me core votage has went from 1.35 volts to 1.175 volts help please buy the way my psu is a tagan 420w and is 9 months old

[FragTek]

Definately sounds like your PSU is on the way out. What wattage and brand is it?

[woppy101]

420watt tagan

[Jim]

How about the voltage on your other rails (12v/5v/3.3v) what are they at?

[woppy101]

where can i find that out

i think i have found it 12.3

cant find the 5

and 3.36 if that helps

[FragTek]

Hrmmm, those rails seem fine. You don't by any chance have AMD's CNQ enabled do you? That would possibly explain the cpu voltage drop but not explain the random turning off unless you've previously overvolted the chip high enough for a long enough period of time that when CNQ tries to lower the voltage the proc is no longer able to run at that low and the computer shuts off?

I dunno, maybe I'm over thinking it a bit

[woppy101]

i dont have cnq switched on i never have mate

i have just checked my bios and my votages are

v core = 1.28

12volt = 12.24

5volt = 5.22

3.3 volt = 3.34

i dont know if there normal or what

[FragTek]

Those look pretty solid. You should find a way to keep track of the voltages under load and see what happens.

[Nagaru]

Those voltages seem pretty normal, but it could be an intermitent fault that shows up only sometimes, or under high load. I would get a multimeter and measure the voltages while running something like 3dmark. That will get the load up and the multimeter will make sure you get accurate readings.

Frag beat me to it.

[woppy101]

i upgraded my graphics card from a 6600gt to a 7900gs on 29 dec and upgraded my cpu from a 3700+ to an opteron 175 at the start of jan will tha make much of a diffrence