Is my bios correct?.. or the bundled program and mbm?

[BeAsTy]

I have a chaintech 9ejl1 w/ my p4 2.0... i'm currently runnin @ 2.3 stable.. when i bumped it up to 120bus.. and set vcore to 1.75... the bios reads the vcore to be 1.72, however... the bundled monitor program and mbm 5 reads it as 1.61.... any1 know about how chaintech does the monitorin?... should i trust the bios?... or the prog's... cause it's a bit unstable @ 2.4