they deleted it.
after working with the dx58so2 for a while and even bought a second one,
the only solution is:
if you have a higher bios version or even the last,
1) note down the memory parameters from the bios, when auto is selected.
2) RMA your board, you get oldest bios back then
3) setup the memory parameters in this one, like noted down
4) never use extreme tuning utility, don't even install it
5) be happy
if you need a relieable monitor tool to verify the board, download this one for free: