I can get mine to 3.9, but right now I am getting a rounding error on one of the cores at 1 hour and 20 minutes of small fft @ 3.8 ghz.

My voltages are:

CPU 1.43 Actual 1.37
FSB 1.35
Memory 2.0
SPP 1.45
MCP 1.55

Any recommendations. I may need to bump up the VCORE.