I hope you experts can help me with a disappointing OC.
 
I have a new Intel quad-core system Q6000 GO stepping, watercooled. CPU stock speed is 2.4 Ghz. I've been able to get the FSB up to 385 MHz x 9 = 3.465 GHz. But at 390 MHz the FSB eventually causes problems in my stress test. (My temperatures are under good control).
I have the CPU voltage control up from stock of 1.30 V to 1.40 volt, System Memory Multiplier at 2.66. (I have 4 Gig of high quality RAM OCZ 1150 MHz DDR2--PC1150.)
FSB OverVoltage control is at +0.10V; G(MCH) OverVoltage at +0.05.
I can get into Windows and run my stress test, sometimes for 20 minutes, but then Windows shuts down the app. Other times, on moving the mouse, I get a black screen and reboot, and so have to go back to 385 FSB.
From what I have read, 3.8 GHz CPU speed should be doable, e.g., with a fixed 9 X multiplier, I should be able to get the FSB up to about 422 MHz.
Any suggestions?

Have you tried running memtest without getting any errors?

I can run at 385 FSB under stress (chess program) but 390 FSB with 3.00A System Memory Multiplier eventually causes problems.
  There must be a setting or settings I'm missing.

At what timings are you running your memory? Voltage?

I have the CPU voltage control up from stock of 1.30 V to 1.40 volt,  
FSB OverVoltage control is at +0.10V; G(MCH) OverVoltage at +0.05.  
 
Here are all the readings that look like memory readings:
 Memory timings:
   DRAM Timing Selectable: Auto
   CAS Latency: 5 Auto
   DRAM RAS# to CAS# Delay:  5   Auto
    DRAM RAS# Precharge:        5   Auto
    Precharge delay (tRAS):      15  Auto
    ACT to ACT Delay (tRRD):     3 Auto
    Rank Write to Read Delay:     3 Auto
    Write to Precharge Delay:     5 Auto
     Refresh to ACT Delay:         36 Auto
     Read to Precharge Delay:    3  Auto
     Static tRead value:             5 Auto
      Static tRead Phase Adjust:  0  Auto
       Command Rate  (CMD):       2 Auto
 
                          Best, CMA