There is no 775 BIOS for DX58SO2, perhaps a typing mistake?
Note that a new BIOS 0779 dated 2011-04-06 is available. I have absolutely no idea if this would help your problem.
Sorry, that is the version that I have installed 0779.
I would suggest to tryto install to another disk (if you have one). Also connect to another SATA port, new SATA cable etc etc.
Also try with just a single memory stick. Remove and re-insert the memory stick to make sure it's seated firmly.
A certain amount of trial and error testing can not be avoided unfortunately.
I find out that the constant reboot was cause because high Temperature on the processor. I think it is because it come with the overclocking funtion enable, so anybody know wich is the best configuration for the performance on the DX58SO2 for an Intel I7 950 Procesor?
if you mean REBOOTING like a cold reboot,
that the computer just is black like pressing the reset button,
then i would try to change the power supply.
we had this case, with the first psu we used (580W)
any power calculator said, 400-450W would be fine.
but still it did not work right with 580W.
but it's not only the power, it's the accurance of the voltages.
The dx58so2 is very picky with these values.
we changed the power supply to a high performance device with 750W.
we have no more problems with these resets anymore.
we still have problems, that the board fails to boot from time to time.
we have to press the reset button then and give it a second try.
this happens about 25 to 3, say 3 fails and 22 suceeds.
so we have ordered another psu which is very fast to start and deliver the exact voltages at the very start.
hope then we can boot up 100% without any fails.