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Need Voltage rails guide/info/help quick

X

xyoufailmex

Limp Gawd
Joined
Nov 5, 2004
Messages
264
Ive been looking for a newbie guide on this, to no avail. I own a Antec SmartPower 450W, and I do know a 12V rail shouldnt be 10.8V, right? My overclock (2.4GHz on 3000+ amd64) is unstable, and perhaps its my PSU? Any info is appreciated, I just need to learn about voltage rails and all of that.
 
No, your 12 volt rail should not be that low. That being said, how did you measure that? You NEED a voltmeter to be sure. BIOS might be close, maybe. Without a voltmeter you just can’t begin to start the process.

Radio Shack, $20 bucks or so is all you need to spend.

Luck
 
I have a Voltmeter.

The thing is, I dont know my way around a PC PSU that well, that was what I was wanting to learn from this.
 
I have the same exact psu... grrr.. my 12v and 3.3v are good.. my 5v drops to 1.90 sometimes.. weird....and this is from like 4.98 down to 1.9 on heavy load... and my system dont crash... hmmmm i also need a volt meter hehhe
 
xyoufailmex said:
I have a Voltmeter.

The thing is, I dont know my way around a PC PSU that well, that was what I was wanting to learn from this.
Click to expand...


Ok, on this link you will find a “Pin Out” guide for your motherboard connector:

http://www.hardforum.com/showthread.php?t=765175&highlight=pinout+guide

You can grab your 12v reading right from an unused 4 pin connector that you would use in a hard drive, or;

Use the black wire from your meter and ground it, then take the red wire and while the machine is running CAREFULLY insert your red probe between the wire and hole in the back of the ATX power connector until you get a reading.

Check your actual voltage reading against whatever software program you are using and I think you will (should) see a difference. Your PSU may or may not have trim pots for adjustment. A 3% variation in voltage is very acceptable when you take your readings, 5% would be the max allowable.

If your using MBM you can use your actual readings to adjust MBM to be more accurate.

IF your not comfortable doing this perhaps you know someone who is and could actually show you the way.

Luck

The mods on that link are for that particular PSU only by the way..
 
well even if it did youd still want to calibrate MBM to a multimeter ;)
 
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