PM me the stop codes from the crashes and I'll be happy to look them up for you. Include all of error message, yes all of it, and I'll be able to narrow it down to a hand full of specific things. Or Google them yourself, it not like it is anything secret to figuring this stuff out.

Also, did you upgrade your BIOS? Your mobo may be new, but the BIOS could be more than a few releases behind which could in fact solve all of your issues.