To correct your statement, a system freeze cannot create a dump. It isn't a system crash that Windows can catch, the same is with shutdown/restart crashes. A BSOD crash is caught by Windows due to corruption or violation of something what doesn't (yet) cause the other system crashes to occur.
Dump files cannot be accessed in their original location, you need to copy them to a different location to access them.
IMHO, this 0x124 is a bit odd. The device ID doesn't return in the files so I'm wondering what it is related to.