PSU: Safe operating voltages?

LOUISSSSS

Diamond Member
Dec 5, 2005
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my psu is FSP FX600-GLN Epsilon series purchased in february 2006

i dont think there is anything wrong with my power supply but just to be sure, what is the lowest and highest voltages for the +3.3, +5, and +12?

the lowest i've seen my +3.3 is 1.30, +5 is 4.89, and +12 is 12.29 readings are from speedfan. numbers from ASUS PC Probe 2 are slightly different (+3.3 doesn't go below 3v, thats the only major difference between pcprobe and speedfan)

is there something wrong with those numbers?
system exactly as in signature
 

mathew7

Junior Member
May 9, 2006
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ATX specs allow +/- 5%, so 12V you can be save between 11.4-12.6V. 5V means 4.75-5.25 and 3.3 means 3.15-3.45.
But this means in worst case scenario, which usually includes high power transitions (like 20W to 100W in 1ms on one line).
Oh, and for 3.3V, is it 1.30V or 3.30V? 1.3V is VERY bad. But can be sensor misintrepretation.
 

deathwalker

Golden Member
May 22, 2003
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Agreed...+/- 5% is a general rule for tollerances. Don't assume though that this means the PS is functioning properly under load though. I have seen in tollerance readings at no or low load and the PS be completely unstable under load conditions such as extreme gaming with high demand graphics environment.
 

LOUISSSSS

Diamond Member
Dec 5, 2005
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this is exactly what speedfan 4.29 says under the fan speed settings on the "Readings" page

Vcore1: 1.38V || -12V: -16.97V
Vcore2: 3.22V || -5V: -8.78V
+3.3V: 1.52 || +5V: 5.13V
+5V: 4.89V || Vbat: 3.23V
+12V: 12.29V
 

F1shF4t

Golden Member
Oct 18, 2005
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Software is not accurate, pick up a cheap multimeter and measure the voltages urself.
 

Boyo

Golden Member
Feb 23, 2006
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I'm not so sure I would totally rely on Speedfan for an absolute accurate reading on voltages. A multimeter is really the best bet for your testing.
 

deathwalker

Golden Member
May 22, 2003
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Originally posted by: Dark Cupcake
Software is not accurate, pick up a cheap multimeter and measure the voltages urself.

Agreed, software reading should never be held as reliable. Obtain an inexpensive Digital Meter(not analog) and take your readings direct.