checking voltage with a multimeter

[lash_larue]

I've got an antec true power quattro 1000 watt supply that I was using with an abit 939 board and anytime i checked my voltages they always showed slightly or a little over what they were supposed to be.

i've built an intel rig and i'm using a BIOSTAR TForce TP45HP board. i'm having some issues overclocking an e8400 chip that is known to do 4GHz+ on air so i'm checking the little things. i have been noticing that my voltages look a little off. the bios shows:

+12.0v - 11.88
+ 3.3v - 3.31
+3.30v - 3.28

using a power supply tester with a digital read out i show:

+ 5v - 5.1
+12v1 - 12.0
+ 3.3 - 3.3
-12v - 11.9
+12v2 - 12.1
5vsb - 5.1
PG - 300ms (what is this?)

while testing with the power supply tester it did not power my video card, which is a 9800GX2 so i dont know if i can trust those readings or not. i wanted to get a reading while i was stressing it with prime so i used a volt meter and checked the +12v on one of the molex connectors and it shows 12.25, but i've been told that i would need to check where the power is going into the motherboard to find out why my +12 shows 11.88 in the boards bios and monitoring software.

are there any guides or does anyone know the proper way to do this? if my system specs are needed i'm running the motherboard, power supply, video card and processor mentioned and 2 gigs of mushkin pc2-9200. i have 1 optical drive and a 36.7 10000rpm raptor hooked up and a 92mm, 120mm, 60mm, and 80mm fans running in the case.

 

[device manager]

Ignore the software and bios voltage readings since they poll the info from the Winbond chip. Due to the resistance from the ATX connector to the Winbond you will have erroneous readings a majority of the time. Your fancy psu tester is also inaccurate and more flash in the pan.

ATX spec allows ± 5% on the mains, therefore if your DMM is showing 12.25% that's a hair over 2% which is very respectable. With the pc powered up and under a gaming load take your DMM probes and test the ATX connector.

 

[lash_larue]

i will definitely try that - thanks for the info.

is this pinout correct?

 

[BillParrish]

PG - 300ms (what is this?)

http://www.pcguide.com/ref/power/sup/funcPowerGood-c.html

 

[lash_larue]

been testing power supplies with this thing for close to a year now and had no idea what that meant, thanks bill