With everything at defaults (BIOS and XTU), this is what it looks like at rest:
I stepped away for a few minutes and found that my system had restarted. After log in I was greeted with:
"Windows has recovered from an unexpected shut down"
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional information about the problem:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA80102DB028
BCP3: 00000000BF800000
BCP4: 0000000000200401
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1
Event log shows:
I then ran IPDT with the above settings, as suggested. It says the processor passed, though XTU reported temps up to 100C near the end, and throttling up to 23%.
I then changed settings in XTU to those listed earlier in the thread (no change to CPU VCore in BIOS, which is reporting 1.248v), rebooted and ran IPDT again:
It never cracked 75C and had no throttling. However, I'm almost sure that it's going to BSOD or give me an unexpected shut down again if I just let it sit over night.
I have ordered a new fan and heatsink that I hope will help, but I honestly don't know what's causing the crashes. If the new parts don't help I have until 12/27 to RMA the CPU and hope for better luck on the next one.