Voltage readings with speed fan

This may be a case of too much knowledge and not enough education. I recently got Speed Fan after linking into this site searching for information about my mobo's temps. What is bothering me are Speed Fan's reading for voltages. They seem to be way out of line. The mobo bios lists the following:
+3.3  3.28
+5.0  5.06
+12.0   12.2
-12.0    11.83
These flucuate slightly as I watch them.
Here are the readings from Speed Fan. I'm going to insert a picture and hope it works. If not then I will manually enter the numbers in a following post. I haven't a clue what all of the numbers refer to. Some seem in line while others are off the map. Which ones refer to the power supply? Thanks.
\image{speed fan}

OK, the picture didn't work. Here are the Speed Fan voltage numbers:
Vcore:    1.49V            5Vsb:   4.96V            +5V:    6.71V
+12V:   12.46V            Vbat:    0.00V          +12V:  16.10V
3.3V:      3.06V        COREA:    3.36V           -12V:   -8.43V
Vcc:       4.99V       COREB:    3.36V             -5V:   -2.89V
Vin2:      0.00V         +3.3V:   4.43V
Why are these numbers, some of them anyway, so extremely different than the ones I am getting in PC Health in my Bios?
Here's the rest of the data given also:
CPU      47C
Temp3  39C
HD0      40C
HD1      39C
Fan01   5233 RPM
Fan02   2961 RPM
System is:
MSI 865PE Neo2-PFISR
Intel 3.0
Power-Color 9600 Pro
Kingston 1GB DDR400 PC3200 (2x512)
LG DVD-ROM
NEC 2500A DVD+/-
Turtle Beach-Santa Cruz sound card
Seagate 120GB 8mb IDE
WD 80GB 8mb IDE
Aspire Super Alien Case
Turbo Link Power Supply 420W

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