i'll add a few old ones that i've not posted

Xeon X3330 (same as q9400)

clocked @ 3 ghz
Vista Ultimate 32bit
Boinc 6.2.19
3151 floating point MIPS (Whetstone) per CPU
6561 integer MIPS (Dhrystone) per CPU

clocked @ 3.3ghz
Vista Ultimate 32bit
Boinc 6.2.19
3471 floating point MIPS (Whetstone) per CPU
7105 integer MIPS (Dhrystone) per CPU

clocked @ 3.5ghz
Vista Ultimate 32bit
Boinc 6.2.19
3666 floating point MIPS (Whetstone) per CPU
7458 integer MIPS (Dhrystone) per CPU

i posted this result back on pg 17 but i'll post it again to show the direct comparison between 32bit and 64bit at the same clock
clocked @ 3.5ghz - looks like it'll do 2500 Boinc ppd
Vista Ultimate 64bit
Boinc 6.3.14 (had issues with this version crashing)
3561 floating point MIPS (Whetstone) per CPU
10367 integer MIPS (Dhrystone) per CPU

this result was not posted yet; changing Boinc version
clocked @ 3.5ghz
Vista Ultimate 64bit
Boinc 6.2.19
3555 floating point MIPS (Whetstone) per CPU
10374 integer MIPS (Dhrystone) per CPU

with 32bit Vista @ 3.5ghz i averaged about 2100 Boinc points per day (ppd)
with 64bit Vista @ 3.5ghz it seems i'll average about 2500 Boinc ppd, i dont have enough good days on 64bit yet to be conclusive but a 400 ppd increase is nice, over the period of a week thats 2800 points and over the period of a year thats 145,600 extra points
it seems with 32bit, i had slightly higher Whetstone scores but 64bit more than makes up for that with Dhrystone