Low voltage reading on +5v, -5v, and -12v rails
Last response: in Components
I have been trying to diagnose a problem with my system (I get a BSOD once every other day or so - Windows says its either CPU, RAM, MB, or PSU related, for whatever thats worth). According to SpeedFan, my +5v, -5v, and -12v rails are all reporting voltages in the following ranges:
+5v: 2.5v - 4.9v, averages around 3.5v
-5v: -0.8v - -4.5v, averages around -4v
-12v: -2v - -12.5v, averages around -6v
+3.3v and +12v rails are within 1% of ideal
These are all aberrantly out of spec, but I am left to wonder if the problem might not lie in the MB, with its voltage sensors.
If indeed, the problem lies with the power supply, what symptoms might I observe with voltages widely out of spec? Where can I find the +5, -5, and -12v rails to test the voltages on them?
+5v: 2.5v - 4.9v, averages around 3.5v
-5v: -0.8v - -4.5v, averages around -4v
-12v: -2v - -12.5v, averages around -6v
+3.3v and +12v rails are within 1% of ideal
These are all aberrantly out of spec, but I am left to wonder if the problem might not lie in the MB, with its voltage sensors.
If indeed, the problem lies with the power supply, what symptoms might I observe with voltages widely out of spec? Where can I find the +5, -5, and -12v rails to test the voltages on them?
More about : low voltage reading 12v rails
I have an Enermax Noisetaker EG495AX-VE (485 watt w/ active pfc).
I know I need to check the voltages with a volt meter, I'm interested in knowing where to check them. If I grab a reading off an unused molex connector, will it give me valid results? Or am I going to have to jerry rig something to test the voltages on the 24 pin MB connector?
I know I need to check the voltages with a volt meter, I'm interested in knowing where to check them. If I grab a reading off an unused molex connector, will it give me valid results? Or am I going to have to jerry rig something to test the voltages on the 24 pin MB connector?
Related ressources:
- ForumVoltage readings + 12v , + 5v (vcch) too low ???? enermax liberty 620W
- Forum12v to 5V rails to give 7v for Fan
- ForumLow - 12V and - 5V
- Forum+ 12V and + 5V regulation
- Forumantec 550w w/ LOW + 5v rail
- ForumWhat's the PSU 5v rail used for?
- ForumPsu 12v and 5v readings very low
- ForumIs my PSU giving enough volts on the + 5V rail ?
- Forum+ 5V reading low .. help?
- Forumnegative 12v is all over the place, negative 5v is dead
- Forum3.20v on the + 5v rail ?
- Forum- 5V reading question
- ForumLow voltage on 12v rail
- ForumEnermax Coolergiant PSU + 5v low ???
- Forum5v rail drop
- Forum12v low voltage .. need help..
- ForumAre these readings normal? + 12V rail a little too low ?
- ForumPlease help me choose a PSU with a - 5v rail ; found these 7.
- ForumConcerning the "hygiene" of my C70 case, and how to maintain it.
- More resources
Read discussions in other Components categories
!
