i had an d805 in the summer!! it runs @ 4,5 on 1,625 vcore 2 hours dual prime with an vmoddet p5wd2..
use 1,5 or 1,4250 and fsb190 to get 3,8
use 5-5-5-15 and 2,1 v
DO NOT VCORE AUTO!!!
try first 1,425 on 3,8
and then 1,5 on 4,0
dosnt work check 1,625 (but u need some waterchill on...