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Help with crazy motherboard voltages

Bjorkus

Junior Member
Antec Truepower 2.0 550watts
Gigabyte GA-P35-DS3L
4gb 4x1 OCZ DDR2 800
E4500 @2.75
8800GT 512mb
1 DVR
2 SATA HD 120gb & 500gb

This is what Everest says my voltages are at idle:

CPU Core 1.39v
+2.5= 2.05v
+3.3= 3.36v
+5= 5.03v
+12- 2.05v (not a typo)
+5 Standby= 5.38v


This is what Speedfan says my voltages are at idle:

Vcore1= 1.39v
Vcore2= 2.02v
+3.3= 3.36v
+5= 5.03v
+12= 2.05v
-12= -16.97v
-5= -4v
+5= 5.38v
Vbat= 3.14v

Unfortunately my bios doesn't list the actual voltages, it just says "ok" next to them. All are listed as ok. I have tested the rails with a multimeter. All are within normal limits. I tried a different PSU, but Everest and Speedfan list the voltages at about the same. I also tested this other PSU with my multimeter, and it too is fine.

I would assume that the sensors on the motherboard are simply bad. (Can you RMA a motherboard for faulty sensors?) But the problem is my 8800GT just died. That's how I spotted the wacky voltages to begin with. One day while playing AoC textures turned to solid colors and started flashing. Then the pc locked up while watching videos online. I updated drivers, I tried older drivers, nothing helped. Now even from before post, the graphics are messed up. Wavy lines across the screen, little pink squares with 6's and square root signs in them. Windows won't even load the card. It says the device reported an error and shuts it down.

I tried the 8800GT with a different mobo and OS, but same results. I put an old x800 in, and everything works fine. The voltages listed above were taken with the x800 since I can't get the 8800GT to work at all.

The computer is dust free, temps are all fine, I've cleaned the connectors, reseated everything, and the readings are still the same.

So are the odd voltages listed just the result of a bad sensor?
Is my graphics card dying just a coincidence?
Are there any other tests I can do to narrow down the problem?

Any insight at all would be greatly appreciated.
 
Software reading of voltages is notoriously bad. If your +12v line was actually at 2.05v, your computer system wouldn't be operational.

I think that your graphics card dying is just a coincedence, and is not caused by voltage issues.

The best way to check voltages is to purchase a cheap DMM (digital multi-meter). Check the 12v and 5v lines off of a molex connector.
 
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