quick psu question

28th September 2005, 03:44

is it normal for your +5v and +12v rail to fluctuate slightly..... I noticed this in bios and my fan rpm's seem to fluctuate also slighty (both my hsf {cooler master 80mm} and my 2 front Antec 80mm's) like I said it is very lightly yes?:

+5v mostly at 5.148v jumps to 5.175v
+12v mostly at 12.258 drops to 12.195

my psu reads:
Okiwa
400W max
+3.3v: 38A
+5v: 50A
+12v: 18A
-12V: 1.0A
-5v: 0.8A
+5VSB: 2.5A

read my signature for the rest of my specs. any response is apreciated, I'm just wondering if it's "normal", btw my Vcore is steady @ 1.338V as well as +3.3v rail @ 3.354V
Thanks again!

Sidney · 28th September 2005, 04:11

Voltage x Amperage = Wattage

1) From what you have given, they add up to ~600 Watts
2) How do you arrive the voltage readings
3) A power supply is only as good as what the monther board circuit can hold.

added:

Prescott is quite power hungry; a 3Ghz Prescott S478 deserves a better than 450 Watts to be safe.

29th September 2005, 05:42

Seems OK to me! These are not big fluctuations. If you were talking about voltages below +5V and below +12V I would start to worry, but since your voltages never drop below +5V nor +12V, you should be OK.

28th September 2005, 03:44	#1
mattyg_dnb Posts: n/a	quick psu question is it normal for your +5v and +12v rail to fluctuate slightly..... I noticed this in bios and my fan rpm's seem to fluctuate also slighty (both my hsf {cooler master 80mm} and my 2 front Antec 80mm's) like I said it is very lightly yes?: +5v mostly at 5.148v jumps to 5.175v +12v mostly at 12.258 drops to 12.195 my psu reads: Okiwa 400W max +3.3v: 38A +5v: 50A +12v: 18A -12V: 1.0A -5v: 0.8A +5VSB: 2.5A read my signature for the rest of my specs. any response is apreciated, I'm just wondering if it's "normal", btw my Vcore is steady @ 1.338V as well as +3.3v rail @ 3.354V Thanks again!

28th September 2005, 04:11	#2
Sidney [M] Reviewer Join Date: Mar 2004 Posts: 15,739	Voltage x Amperage = Wattage 1) From what you have given, they add up to ~600 Watts 2) How do you arrive the voltage readings 3) A power supply is only as good as what the monther board circuit can hold. added: Prescott is quite power hungry; a 3Ghz Prescott S478 deserves a better than 450 Watts to be safe. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

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29th September 2005, 05:42	#3
zachig Posts: n/a	Seems OK to me! These are not big fluctuations. If you were talking about voltages below +5V and below +12V I would start to worry, but since your voltages never drop below +5V nor +12V, you should be OK.