Core i7/X58 Overclocking Thread

[SteveRo]

Today I started OC'ing my new hardware. Besides the first results (which look promising, I gues) I also bumped into some questions.

Questions:
As you can see I'm using Asus P6T mobo but there are some settings in bios which I'm not sure of what to select. These are the following items and settings I applied:

C1E Support: disabled
Hardware prefetcher: disabled
Adjecent cache line prefetch: disabled
Intel Virtualization tech: disabled
CPU TM function: enabled
Execute-disable bit: enabled
Intel HT technology: disabled
Active processor cores: all
A20M: disabled
Intel speedstep tech: disabled
Intel turbomode tech: disabled
Intel C-state tech: disabled

- Did I apply the correct settings on overall?
- Is it possible to enable a power consumption saving setting (like speedstep for instance) while overclocking?
- Is it possible to use turbomode on P6T when using 190+ bclk?

First results
After a lot of reading I applied some reference voltages in the bios and started OC'ing right away. It seems to be stable right away. I'm not used to that after switching from P5E3-Premium to this board. These results are without HT enabled. But is there much more vcore necessary when enabling HT? I think my temps are good and still have some potential left. Nonetheless I would like to know your opinion on these results and if possible give some advice for improvement.

Settings:
MP: 20x
BCLK: 200
DRAM: 1200
Uncore: 3200
QPI: 3600
Vcore: 1.35
CPU PLL: 1.92
QPI/DRAM: 1.35
CPU spread spectrum: disabled
PCIE spread spectrum: disabled

Everything else on AUTO

a couple ideas for you.
i think the max cpu pll should be no greater than 1.89 (according to intel)
you may need more than 1.35 vcore for 4 ghz, I needed 1.4v