Core i7 920 rev D0 stepping 5 :)

[dejanh]

What board gives the 22 multi on 4 cores?

Technically, all should if the rest of the cores are idle i.e. powered down due to C-state transitions. I have never managed to recreate this on the R2E though with 4 i7 940s unless I physically disable all but one core.

of course im not sure but i believe the max bclock is restricted by the mobo,bios maybe ,i never reached more than 222bclock with any cpu and i tried to push it hard with tons of Core i7(retail and ES) but I only used three good boards(Tpower ,RE2 and Gigabyte Extreme)

I'm quite sure that it's the X58 chipset. My second bet is the CPU itself, but I find this a bit less likely now. Keep in mind that we are talking about many different motherboards, and many different chips, and 99.9% have the same BCLK limit, and the only thing that is consistently common between them is the X58 chipset.

I would not be surprised if the new B-3 revision of X58 allowed higher BCLK though we won't know until sometime after mid-May I think.

D0 is supposed to bring a few things to the table:

1) More consistent overclocks (no large variations in overclocking ability like with C0 chips where some can do only 3.8GHz and others can do 4.6GHz).
2) Slightly lower voltages for same clocks.
3) More balanced temperatures (related to voltages above).

Generally, D0 will not do much for improving the overclocking ability unless D0 was based on the best of the best of C0 in which case most D0 will clock better than an average C0.