Ok, some first tests:

CPU vcore is undervolted by ~0,05v (difference between bios setting and CPUz)
DRAM voltage is overvolted by ~0,1v (difference between bios setting and bios monitoring)
vPLL voltage is overvolting by ~0,1v (difference between bios setting and bios monitoring)

Also vcore is dropping by 0,015v under load with load line calibration enabled according to CPUz.

Will check these results later with a DMM.

Now some overclocking:

Setup:

Intel Core 2 Duo E6300 ES cooled by OCZ Vindicator
Asus Maximus Formula
OCZ DDR2 PC2-9200 FlexXLC
Asus 8600GT Silent
OCZ Powerstream 520W

Max. FSB @ vPLL 2.3v

550MHz increasing vPLL increases max. FSB, so this result is CPU limited (validator link)

Max. mem @ 2.7v

700MHz CL5-6-6-21 (validator link)

It seems that the memory isn't running as great as it did on my P5K. I can run 1m at the same speed on my P5K with only 2.55v (bios setting) but with different subtimings.

Also a 1M run:

14.640s this run is also vPLL limited (forgot to make a validation file, will do that next time)