Power Supply Voltages

[John]

My new power supply seems to be off more than I'd like it, but before I
complain, I'd like some other opinions.

I am reading from the BIOS. I have already had two power supplies on
this system and the BIOS reported fairly close voltages, so I believe it
is reading accurately.

VCore 1.79v
3.3v 3.25
5v 4.78
12v 12.48

What do you think? Do I have a problem?

 

[Guest]

John,

Insufficient voltages in a power supply would manifest itself by causing
problems such as crashing and/or rebooting, etc. Are you having such
problems? If not, and everything is running properly, you don't have a
problem.

 

[John]

John,

Insufficient voltages in a power supply would manifest itself by causing
problems such as crashing and/or rebooting, etc. Are you having such
problems? If not, and everything is running properly, you don't have a
problem.

Right now I'm testing it on my old system. I'm about to put in my Vista
cards and MB. The PSU is overkill, so I expect size is not a problem.

 

[Richard Urban]

Power supply size is only a part of the equation. Power supply regulation
(under maximum load) is equally important. If your voltages are off as much
as you post (under a light load), they may go totally out of spec under
maximum load.

I used to design instrumentation power supplies that were +/- 1% from no
load to full load. Most cheap computer power supplies are plus/minus 10%
(and they don't even say if this is true from no load to full load).

You have to look at the specs if you are worried about the voltages.

--


Regards,

Richard Urban
Microsoft MVP Windows Shell/User
(For email, remove the obvious from my address)

Quote from George Ankner:
If you knew as much as you think you know,
You would realize that you don't know what you thought you knew!