If you have a RAID array already setup you will need to leave that set to RAID otherwise your array will corrupt. Or did you mean the settings toward the bottom? If you meant though, you can disable those if you want if you are not using IDE ribbon devices or have anything on the purple ports.

Try these for 400 FSB

Robust Graphics Booster___________ [Auto]
CPU Clock Ratio ____________ [8]
Fine Clock Ratio ____________[0.0]
CPU Host Clock Control_ [Enabled]
CPU Host Frequency (MHz)__________ [399 or 401]
PCI Express Frequency (Mhz)_______ [Auto] << Set 100
C.I.A. 2__________________________ [Disabled]
System Memory Multiplier (SPD)____ [Auto] << 2.66D
DRAM Timing Selectable_______ SPD __ [Manual]

Performance Enhance = [Standard]

CAS Latency Time_______________5_
Dram RAS# to CAS# Delay________6
Dram RAS# Precharge Delay______6
Precharge Delay (tRAS)_________18

ACT to ACT Delay (tRRD)___3-4
Rank Write to READ Delay__3-6
Write to Precharge Delay__4-6
Refresh to ACT Delay_____52-62
Read to Precharge Delay___3-5
Static tRead Value________6____Auto___ << Set 7-8 for now
Static tRead Phase Adjust_0_______ [Auto]

CPU/PCIEX Clock Driving Control [800mV]
CPU Clock Skew Control [normal]
GMCH Clock Skew Control [Normal]

System Voltage Control____ [Auto] << manual
DDR2 OverVoltage Control__ [Normal] << Set +0.3 = 2.1V
PCI-E OverVoltage Control_ [Normal]
FSB OverVoltage Control___ [Normal] << +0.1 for stability or Auto
(G)MCH OverVoltage Control [Normal] <<< +0.2-0.3 for 4GB
CPU Voltage Control_______ [Normal] << Set this, you need to set your own voltages when you overclock. Try 1.23-1.425

Limit CPUID Max. to 3.....................: [Disabled]
No-Execute Memory Protect............: [Enabled]
CPU Enhanced Halt (C1E)................: [Enabled] << Disable
C2/C2E State Support....................: [Disabled]
x C4/C4E State Support..................: [Disabled]
CPU Thermal Monitor 2(TM2) ...........: [Enabled]
CPU EIST Function.........................: [Enabled] << Disable
Virtualization Technology................: [Disabled] Enabled if you use Vmware/Virtual PC

Integrated Peripherals
Legacy USB Storage Detect___________________[Enabled] *Note* Must be enabled to flash from USB