Just an update on this crazy chip. When running orthos overnight I keep getting errors and lockups around 10-12 hours mark. Usually when this happens a slight increase in vcore would stabilize. However not only did this not work, after the first error subsequent errors appears almost instantaneously. Then I realize crashes happened whenever coretemp gets above 70C. So I tried to lower vcore (from 1.4 bios). To my surprise the it keeps booting up. Until eventually I am running 438x8=3.5G at stock volts (1.287 bios, 1.216 underload)!
Now it's been running 7.5 hours of orthos over a warm afternoon and temp never get above 60C. This is the most nutz chip I have ever seen.
For those wanting to find a G0, they only appear as oem chips as far as I know.