Strange VCore/Temp issue

[996GT2]

So my friend who had a problem breaking 2.5GHz is thinking about boosting the VCore. However, his temps and the voltage returned by several programs don't match. Basically, CPU-Z and some other programs say that he's running 1.57 Volts, but several temperature programs say that he's getting 36C idle/~45C load. He's running stock A64 cooler that came with 3200+, so obsiously there is no way he's going to get temps that low at such a high VCore. So does anyone know if the programs are inaccurate and how to get a true value of his VCore? Also, is his mobo possibly undervolting? If so, does he have any more headroom with the VCore?

Here's a CPUZ screen to help:
http://img223.imageshack.us/img223/1791/asdfa4pq.jpg

EDIT: He lowered the VCore .025 in BIOS and his VCore dropped .1V in CPU-Z...strange
Also his computer failed prime95 after ~ 5 hours...

HIS SPECS:

AMD A64 Venice 3200+ @2.5GHz
Epox 9NPA+ Ultra
STOCK AMD A64 Cooler w/o Heatpipes
2*512mb CL2.5 Corsair ValueSelect
ATI X800GTO^2 Flashed to 16PP and OC'd to X850XT PE
Fortron AX400PN 400W PSU
CM Cavalier case with 1 80mm intake and 1 120mm exhaust (stock fans that came with case)

 

[996GT2]

bump

 

[996GT2]

Afternoon Bump...

 

[Maximilian]

I might be wrong here but im going by what my comp does. It based on an epox 9NPI+ and the vcore can be upped in .25 incriments. But it wont stay exactly ,25 above the stock voltage, itll go up and down as i think the mobo simply feeds the chip what it needs within a limit.

Also what is the stock cooler? It wont be the 4 heatpipe huh? He might just have a really good chip if it runs at 36 idle - 45 load. 36 idle isnt a fantastic temp buts its allright, and considering the vcore is at 1.57 thats pretty damn good.