PC voltage/temperatures - is my power supply messing everything up?

[Jomi B]

I've been having issues with my PC where it will hang on me. I can still move the mouse and sometimes close programs, but nothing will open and attempting to reboot causes it to get stuck at the "Logging off..." screen.

On a suggestion elsewhere I downloaded a program to monitor my voltage/temperatures, and I'm thinking that it's my power supply causing the grief.

The 3.3V and 5V readings are fine, but the 12V goes sometimes as low as 10.9V.

Would that alone be causing these temperature values?
(I'm aware they're too high, especially considering all of this is while idling)

SYSTIN: 12C (53F) up to 18C (64F)
CPUTIN: 30C (86F) up to 68C (154F)
AUXTIN: 6C (41F) up to 20C (68F)

(CPU is duo core)
CPU#1: 38C (100F) (no variation)
CPU#2: 33C (91F) up to 42C (107F)


HDD: 26C (78F) up to 27C (80F)
GPU: 82C (179F) up to 83C (181F)

Would that small of a voltage dip cause the temperatures to be that high? It's all clean inside with no dust, so it's not clogged up, and the room itself isn't hot.

 

[cin19]

Your GPU looks like the high end GPU, and the PSU is not a good one, because the +12V rail voltage is very low, the good one should be keep the voltage is +/- few % on 12V. And when you play the game, the PSU can't output enough power to the GPU, then the PC will hang in there or freeze.
You should get the better PSU, if you have NVidia card you need pay attention the amps value on the +12V too.

What is your GPU? also PSU?

 

[Jomi B]

What is your GPU? also PSU?

It's actually a pretty old card and PSU, the temperature control is just poor for some reason.

The GPU is an ATI Radeon 4850 HD 512MB
The PSU was a Thermaltake Purepower 500W

I've since replaced the PSU and ran the testing again, and the temperatures were basically the same, and the 12V is still only drawing as low as 10.98V.

I'm wondering if this is perhaps not a PSU issue, but rather a motherboard issue? Maybe it's not drawing enough power? Everything in the PC is 5 years old (except for the new PSU).

 

[cin19]

It is your old PSU problem, and what is your new PSU? Google it, if you can find the review for it to see it is good or not.
Because the thermaltake Purepower 500W is not the good one, from the review is should be the less 500W PSU, and has very bad +12V rail, http://www.hardwaresecrets.com/article/Thermaltake-Purepower-500-W-Power-Supply-Review/990/9 the HD4850 run hot, the 82c is normal for the HD4850, you can google it.

 

[Jomi B]

It is your old PSU problem, and what is your new PSU? Google it, if you can find the review for it to see it is good or not.

My new PSU is: Rosewill CAPSTONE-650 650W Continuous @ 50°C, Intel Haswell Ready, 80 PLUS GOLD, ATX12V v2.31 & EPS12V v2.92, SLI/CrossFire Ready, Active PFC Power Supply

That's crazy about the temperature being normal for the 4850 cards! I googled it like you suggested and they really do run that hot idling!

I think those problems I was having with my PC freezing was due to a HDD impending failure. I tried a different HDD and it's been fine so far, with no crashes or hangs.