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Voltage reading pc -12v

  • Power Supplies
  • Components
Last response: in Components
July 14, 2010 2:11:03 PM

Hi everybody,

I think I have a PSU problem, but not sure! The PC is shutting down at 1 minute when windows started. First I thought it was overheating, but now I'm not sure. Reading stuff on voltages made me wonder and since I'm truly a noob...
Pc is running at the moment, i disabled the S.M.A.R.T fan function in BIOS. RPM are really loud now, but it works... for now.

Some info:

Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7600) (7600.win7_gdr.100226-1909)
Language: Dutch (Regional Setting: Dutch)
System Manufacturer: Acer
System Model: Aspire M7711
BIOS: Default System BIOS
Processor: Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz (4 CPUs), ~2.5GHz
Memory: 6144MB RAM
Available OS Memory: 6144MB RAM
Page File: 1875MB used, 10408MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 64bit Unicode

Card name: NVIDIA GeForce GT 130
Manufacturer: NVIDIA
Chip type: GeForce GT 130
DAC type: Integrated RAMDAC
Display Memory: 3565 MB
Dedicated Memory: 749 MB
Shared Memory: 2815 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: P235H
Monitor Id: ACR00CB
Native Mode: 1920 x 1080(p) (59.934Hz)
Output Type: DVI

Temperatures/ RPM's/ Voltages: (ref. SpeedFan)

GPU 45c
Temp1 49c
Temp2 34c
Temp3 52c
Temp1 47c
Core0 63c
Core1 54c
Core2 55c
Core3 55c

Fan1: 4412 RPM
Fan3: 973 RPM

Vcore1 1.17V
Vcore2 2.96V
+3.3V 3.34V
+5V 6.85V
+12V 11.97V
-12V -5.86V
-5V -5.31V
+5V 5.03V
VBAT 3.15V

I truly have no clue what's going on. Maybe you could help.
Thanks in advance

More about : voltage reading 12v

a c 243 ) Power supply
July 14, 2010 2:26:53 PM

"And never pay any mind to the -5V or -12V reading in software. Those are typically EXTREMELY off simply because most power supplies have no -5V lead and most motherboards don't use the -12V lead. The software simply does not know how to report back the nonexistent readings and some pretty wacky numbers are often the result."
July 14, 2010 2:31:36 PM

That's a load of. But then why does it shut down? is it a thermal shut down?
With the SMART fan function disabled it is running ok for now. Is the SMART function broken??
Related resources
a c 144 ) Power supply
July 15, 2010 12:47:43 PM

The +5 volt reading is really high (out of tolerance). Use a DMM to measure between the black and red wires on one of the drive molex power connectors.

In fact, you can check all the voltages from the back of the power plug. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.
July 15, 2010 1:01:15 PM

Thx 4 the reply. What does it mean? what should I do if it is out of tolerance? Buy a new PSU?