spontaneous reboot... voltage issues

**Gomer** · July 19th, 2003, 11:23 PM

AMD XP 1800+
EPoX 8KHA+
Win XP

My normally rock solid system just rebooted itself while browsing the web. No warning.

It hung for a bit on the reboot at the desktop.

My mobo monitor is reporting the following...

Core 0: 1.74V
Core 1: 1.50V
+3.3: 3.25V
+5.0: 4.81V
+12: 12.10V
-12: 2.64V
-5.0: 0.00V

Do these look right? I know very little about proper system voltages. Temps were 48C, 30C

**Omardeth** · July 19th, 2003, 11:28 PM

what the power supply . alot of the times rebooting is a power supply dieing issue . least it has been that way for me when it happened . can you switch it out to test it and see if that stops the problem . also i don't get the core 0 and core 1 thing . and 0 on the -5v ?

**Gomer** · July 19th, 2003, 11:31 PM

Dunno about the core deal.

Can't swap PS.

**Omardeth** · July 19th, 2003, 11:34 PM

what the full list of whats in your pc . and whats the power supply can you post the rails also that are listed on the side of it ,.

**Idigguns** · July 19th, 2003, 11:35 PM

Core 0 looks right, Idunno about Core 1. Idunno about that -5V either. Everything else looks good though. Of course it could be an intermittant problem, and those are the hardest to diagnose. I would agree, try a good quality PSU first. Next, I would try a battery back-up. That'll help "smooth out" the power coming in.

**Gomer** · July 19th, 2003, 11:38 PM

sure... this sys has been stable for over a year mind you...
Pioneer 16X DVD
Plex 48x24x48 CDR
WD 40GB HD
512 DDR
misc ethernet card
80mm front and rear
stock HSF

I don't think I am working it too hard

lemme pull the cover for the rail info

**Omardeth** · July 19th, 2003, 11:41 PM

it just might be going out i am sorry to say .

**Gomer** · July 19th, 2003, 11:49 PM

Enhance PS
+3.3V - 20A
+5V - 26A
+12V - 13A
-12V - 0.8A
-5V - 0.5A
+5Vsb - 2A

+3.3V & +5V Combined - 175W
+3.3V, +5V, & +12V Combined - 280W

**Gomer** · July 20th, 2003, 12:02 AM

Bios reports:
Vcore 1.74V
Vagp 1.50V
+5V 4.81V
+12V 12.09V
Vio 3.24V
VDIMM 2.64V
VBAT(V) 3.05V
5VSB(V) 5.40V

**Omardeth** · July 20th, 2003, 12:17 AM

well the 12v rail is right on the edge at 13A it is anuff but it is really close . maybe the supply is just dieing ,

**Solid Snake** · July 20th, 2003, 12:08 PM

The -5v rail is responsible for serial port operation. Unplug any serial devices if you have any and check your voltages again.

**surreal** · July 20th, 2003, 12:23 PM

Gomer,
I have been having the same problem, but after swapping out everything, and another new build doing the same thing I realized it was crappy power from the wall. It finally even quit working lights plugged in,,,, about the same time it caught fire.

Have a friend that can test the outlet?