GA-X38-DQ6

[cma6]

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?

 

[cfvh600]

Have you tried running memtest without getting any errors?

 

[cma6]

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.

 

[cfvh600]

At what timings are you running your memory? Voltage?

 

[cma6]

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