Then some message about link information should follow, but not found in your log. So I guess that it fails in initialization and terminates itself - that's all I can tell.
This is what I get at the end of the post -
Waiting for DSMOS...
Previous shutdown cause :3
DSMOS has arrived
-->> right here is where the link initializes on the X58A-UD7<<--
Warning: IOPlatformPluginUtil: get CPUIDInfo: this is an unknown cpu -- power management may be incomplete or unsupportd
Sound Assertion in AppleHDACodecGeneris at line 350
and then it blackscreens and the desktop opens up.