How are the actual voltages (measured reliably with a DMM
or something) the P5K Deluxe compared to the
settings in the BIOS?

Does VCORE actually match what's expected from the
BIOS settings for various versions of BIOS and
various VCORE values from 1.1 to 1.5x?
Does it droop a lot under load?

I notice that ASUS redesigned the RAM voltage regulation
on the P5K PREMIUM vs. the P5K deluxe and added several
more MOSFETS to their new board. Does the P5K DLX
generate a lot of instability / droop for RAM voltage
and so they found the need to change it radically?

I've heard lots of stories about many (most?) other ASUS
P5**** model boards having BIOS bugs or design
quirks where the actual VCORE is pretty different than
expected from the settings in BIOS.

I've also heard that their "x-phase" VCORE power on some
other models boards doesn't even do ANYTHING
unless you set the various VCORE options a certain way in
the BIOS AND tell it to give a 200mV Vboost.

Any reports on the P5K's voltages and power stability
under heavy load (Q6600 OC'd, 4 double sided RAM sticks) would be welcome, thanks in advance!