Ok
I am stable at 3.8 GHz with the following setting
but I can't get it stable over that
I tried playing with the bios but it seems it's Impposible to hit 4

Asus Maximus Formula II Bios 0901
Corsair XMS2 DHX DDR2PC6400 (4 GB)
Corsair VX550W 550W
Cpu E84000

Ai Overclock Tuner: Manual
OC From CPU Level Up: Auto
Ratio CMOS Setting: 9
FSB Frequency: 424
CPU Clock Skew: auto
NB Clock Skew: auto
FSB Strap to North Bridge: 333
DRAM Freq: Auto
DRAM Timing Control: Manual
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : auto
Row Refresh Cycle Time : auto
Write Recovery Time : auto
Read to Precharge Time : auto

Read to Write Delay (S/D) :auto
Write to Read Delay (S) : auto
Write to Read Delay (D) : auto
Read to Read Delay (S) : auto
Read to Read Delay (D) : auto
Write to Write Delay (S) : auto
Write to Write Delay (D) : auto

Write to PRE Delay : auto
Read to PRE Delay : auto
PRE to PRE Delay : auto
ALL PRE to ACT Delay : auto
ALL PRE to REF Delay : auto

DRAM Static Read Control: Auto
Dram Read Training : Auto
MEM OC Charger : auto
Ai Clock Twister : auto
Transaction Booster : auto
PCIE Freq: 100

CPU volt:1.32500
CPU PLL Voltage: auto
NB Voltage: auto
DRAM Voltage: 2.10475v
FSB Termination Voltage: auto
SB Voltage: auto
SB 1.5 Voltage: auto

CPU GTL Reference 0 : auto
CPU GTL Reference 1 : auto
CPU GTL Reference 2 : auto
CPU GTL Reference 3 : auto
North Bridge GTL Reference : AUTO
DDR2 Channel A REF Voltage : AUTO
DDR2 Channel B REF Voltage : AUTO
North Bridge DDR Reference : AUTO

Ratio CMOS Setting: 9
C1E Support: Disabled
Max CPUID Value Limit: Disabled
Intel Virtualization Tech: Enabled
CPU TM Function: Disabled
Execute Disable Bit: Enabled

Load-Line Calibration: enabled
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled