What speed OC could I get using DDR3 2000 and not raising the BCLK on my Core i7 920?

[Compddd]

I read that the memory multipliers on the 920 & 940 are unlocked. So what speed OC could I achieve using DDR3 2000 at it's max rated speed?

 

[Denithor]

The memory multipliers are either 6 or 8 for the 920 & 940. So you don't need DDR3-2000. Because DDR3-1333 will take you all the way up to BCLK 222 without exceeding the rated speed (6x222). And with an i7 920 that will give you up to 4.44GHz (20x222). Better have some good cooling.

EDIT: To directly answer your question -

DDR3-2000 = 2000/6 = 333 BCLK
920 - 20x333 = 6.66GHz
940 - 22x333 = 7.33GHz

Just as a note, keep in mind that the core & memory multipliers work completely independent of each other. So you can set BCLK to 200, choose to run your i7 at 3GHz (15x200) or 4GHz (20x200) and then adjust your memory speed to DDR3-1200 (6x200) or DDR3-1600 (8x200). Read this page if you want a more comprehensive look at overclocking these systems.

 

[JAG87]

Thats not entirely true, many motherboards allow a higher memory multiplier selection with the 920 and 940 to natively support DDR3-1333 and DDR3-1600.

But thats besides the point, which is you don't need DDR3-2000. You will have to keep your Uncore at 4000 Mhz to keep DDR3-2000 stable, and that will require a ridiculous amount of VTT voltage, from what I've seen around 1.5V. Thats a good recipe to kill your i7 quickly.