1. Reset BIOS (not sure if K10N78 has a button, otherwise use jumper)
- still BSOD? Then...
2. Get Micrososft Diag MemTest:
http://oca.microsoft.com/en/windiag.asp
3. Run test with only one stick at the time
If all sticks run the test without errors, it's most likely your onboard memory controller gone lost.
Standing by for feedback...