You can't use like ddr500 ram with those boards because voltages and timings standard with that type of ram isn't supported with that board.
Prolly get it to work fine if you mess with timings and stuff with that board. It will be a lot of .. timing changes, reboot, stress test or MB jumper reset, rinse and repeat till you find a stable setup. Then write it down
Also, I never use MSI boards anymore for anything and will not recommend em.. but don't they just use AMI and award bios? How did it get a pheonix bios on it
Edit: Yeah, was right.. hmmm
http://216.158.218.35/edoc/bios_uploads/6570v58.zip is for that board you listed, and date stamped 8/5/2004
And don't DL that and flash it without checking first, just not good practice hehe.. even though it's right!