CPU - Vcore, 3.3V, 5V, 12V

[kornermi]

My motherboard (Aopen - AX6BC) hardware monitor gives me these 4 values. I understand Vcore is for CPU, and 3.3V is for bus. What are 5V, 12V value for?
And after I changed the power supply a couple of days ago, 3.3V value jumped from 3.29 to 3.46, which is at the edge of 5% margin from the nominal value. Does power supply do this? Thanks.

 

[Dark4ng3l]

If you run you cpu at any of these voltages you will fry it in like 10 minutes(10 seconds for 12). I think those are for i/o voltage though not vcore.

 

[Viperoni]

lol 🙂

Vcore is your processsoor internal voltage.
depends on your processor

3.3v is the VIO voltage...

5v and 12v are the lines that go to devices like hd/cdrom/floppy etc etc.

That's a pretty high default VIO voltage...I'd be worried (3.46v)

 

[kornermi]

All I did was change the power supply from Enlight 250W to critically acclaimed Antec PP303X 300W. After that,

Nominal(Acceptable range(5%))---before----after
3.3(3.13 - 3.46)----------------3.29------3.46
5.0(4.75 - 5.25)----------------5.23------5.08
12.(11.40 - 12.60)--------------12.18-----12.18
Vcore(2.0 for PII)--------------2.05------2.05

So, 5V value gets closer to the nominal value, while 3.3V value deviates further. I have 4 hard drives, 2 CD devices, so I thought 300W power supply was not overkill. As a matter of fact, Enlight 250W power supply doesn't even have enough power outlets to feed all of my devices. Do I have to get back to original 250W power supply? If 3.46 for VIO is too high, what kind of problems should I anticipate? Thanks.

 

[jaylek55]

I too am wondering about these measurements. These are mine:

+12V = 12.099
-12V = -11.57
+5V = 4.945
-5V = -4.96
+3.3V = 3.44
VCore = 1.728

Are these good? Lately my system has been crashing while watching Divx/asf videos. Could one of the above value be the culprit? How can I change that?

 

[chemwiz]

I thought + or - %10 was the acceptable range, that's the specs I've seen at least. I think you should be fine leaving the 300watt supply in.

 

[NforSa]

my Epox 8KTA+ gives me :

+12 - 12.004
+5 - 5.016
+3.3- 3.55 (only cos I bumped it up to get my PC-100 stable @ 133cas2)

PS is Aopen 300watt (remarked Sparkle FSP-600GT)
CPU is duron 1ghz
3 HDD's, 2 CD-roms
5 PCI cards

 

[tweakr]

You'll have no problems with a VIO of 3.46v. I've been running my VIO at 3.9v for the last couple've week since getting my BX-133RAID, again to keep a stick of old PC100 happy at 133 CAS2. So far, I've had no crashes that can be attributed to the higher VIO.

cheers
tweakr

 

[peemo]

My Soyo board sets VIO to 3.5v by default, I can't even set ti to 3.3v. Never had a problem.