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What can cause my +3.3 V to consistantly run below 3.0 volts?

P

powerMarkymark

Platinum Member
Motherboard Name Asus P4C800 / P4P800 / P4P8X

Temperatures
Motherboard 39 °C (102 °F)
CPU 40 °C (104 °F)
Maxtor 6Y120L0 39 °C (102 °F)
Maxtor 6Y120L0 42 °C (108 °F)

Cooling Fans
CPU 3879 RPM
Power Supply 2935 RPM

Voltage Values
CPU Core 1.54 V
+3.3 V 2.83 V
+5 V 5.27 V
+12 V 12.22 V
+5 V Standby 4.48 V

Thanks

EDITED

Well I swapped out the power supply for an Enermax Whisper EG-465P-VE and things have stabalized, looks like it was my power supply that was biting the dust.

Thanx everyone.

Marc



Voltage Values
CPU Core 1.61 V
+3.3 V 3.44 V
+5 V 5.16 V
+12 V 12.34 V
+5 V Standby 4.58 V
 
what sofware are you using? I'm using MBM5 and not sure where to place my sensors for my Case and CPU. Looking for some help
 
All your rails save 12V seem pretty far off (more than 5%) I would guess you have a Powersupply that is not good enough for your needs or is faulty, this can cause and unstable system and will definitly reduce the life of the parts in your system. I would suggest getting a new PSU or RMAing the one you have if it's got sufficent specs.
 
Well I swapped out the power supply for an Enermax Whisper EG-465P-VE and things have stabalized, looks like it was my power supply that was biting the dust.

Thanx everyone.

Marc

New voltages:

Field Value
Sensor Properties
Sensor Type Winbond W83627THF
Sensor Access ISA 290h
Motherboard Name Asus P4C800 / P4P800 / P4P8X

Temperatures
Motherboard 36 °C (97 °F)
CPU 37 °C (99 °F)
Maxtor 6Y120L0 37 °C (99 °F)
Maxtor 6Y120L0 40 °C (104 °F)

Cooling Fans
CPU 4963 RPM
Power Supply 2961 RPM

Voltage Values
CPU Core 1.61 V
+3.3 V 3.44 V
+5 V 5.16 V
+12 V 12.34 V
+5 V Standby 4.58 V
 
Originally posted by: Navid
Use a digital volt meter to measure the voltages. Don't rely on a software utility.
Click to expand...

Fixed spelling, but the right idea. The voltages reported by your BIOS/MBM/Everest/Whatever can be off by a considerable margin.

 
Originally posted by: Matthias99
Originally posted by: Navid
Use a digital volt meter to measure the voltages. Don't rely on a software utility.
Click to expand...
Fixed spelling, but the right idea. The voltages reported by your BIOS/MBM/Everest/Whatever can be off by a considerable margin.
Click to expand...

Agreed. As long as the values don't radically fluctuate under load, if they are all relatively consistently under-spec, then it could simply be that the mobo's sensor chip or software utility is miscalibrated. I've purchased/ugpraded PSUs, and ended up with the same (slightly under-spec) readings as before, before I realized that the readings were simply just on the low end.

If they do tend to fluctuate downwards, then they are indeed being over-stressed, and the PSU should be replaced with something more-powerful/better-regulated.
 
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