If someone could test the following I be very grateful.

On my old core2duo 6420 which had a stock speed of 2.16ghz I got it to 3ghz on stock voltage and with c1e power saving left enabled.

My thoughts are on the i5 with 1600 spec ram, would something like this work?

stock voltage for vcore
voltage for ram manually set to ram spec, imc/vtt raised if necessary to keep 0.5v gap.
BCLK set to 160
cpu multiplier left on auto (as needed for turbo mode and power saving)

so if I am not mistaken it would result in something like this.

clock speed of 160x9=1440mhz in idle mode at 0.872v
clock speed of 160x20=3200mhz in normal mode at 1.15v
more likely clock speed of 160x21=3360mhz in normal load situation as auto tends to use x21 mostly.
and in turbo mode clock speed of 160x24=3840mhz I think still uses stock voltage

so the questions are

can an i5 run at 1440mhz at 0.872v? and can it also run at 3840mhz with 1 core at 1.15v? and 3360mhz with all 4 cores?

I think no one has tested this in public yet. That would be a power/heat efficient overclock.

My old 6420 I clocked it to 3ghz from 2.16ghz on stock voltage and with c1e power saving on so was also running past 2.16ghz in reduced voltage in idle mode. So if I can do something similiar on the i5 it would be great.