hey there mayhaps i can help
Below is a list of settings I would use
Turbo Mode (on/off): off
Hyper-threading (on/off): on
HPET (on/off): ..
Loadline Calibration/VDroop (on/off): off
CPU Voltage: 1.35V
CPU PLL Voltage:1.85
Voltage:VTT: 1..41 (this is the correct scaling for 1.65 volts on the ram
DRam Voltage: 1.66V
IOH: 1.1
ICH I/O: 1.55
ICH Core: 1.1
CPU Differential Amplitude: 900Mv
YOU SHOULD BE able to get to 4 gigs EASILY with the above settings, in a avarage do like mine
you can get 4.24 to 4.4 gigs on 1.3875 cpu voltage and 1.42 VTT
Having the CPU PLL on 1.9 is ok, but if you expect your cpu to last a long time, i wouldnt put it higher than 1.85