Enabling 400mhz under the bios creates system hang

[Glavinsolo]

System:
350W Chieftec
9700 Pro
Asus P4c800-e
P4 2.8 # 3.21
Corsair XMS 3200LL (Timings) 2-3-2-6 T1
SB Audigy 2 ZS

(System hangs and is extremely slow when the ram is set to 400mhz under the bios)
I have it set to auto right now and CPUZ is showing 133MHZ per dimm?
Thanks for the help!
See below:



Configuration System Frequency/Voltage

AI Overclock Tuner @Manual
CPU External Frequency @230
DRAM Frequency @400 Mhz <---------------- Currently have it set to Auto but hangs when set to this
AGP/PCI Frequency @66.66/33.33
CPU Core Voltage @1.6000Volts
DDR Reference Voltage @2.85Volts
AGP VDDQ @1.50V
Performance Mode @Standard


CPU INFO

CPUID Maximum Value Limit @Disabled
Hyper Threading Technology @Enabled


Advance Memory

Configure DRAM Timing by SPD @Disabled
DRAM CAS Latency @3.0 Clocks
DRAM RAS Precharge @2 Clocks
DRAM RAS to CAS Delay @3 Clocks
DRAM Precharge Delay @8 Clocks
DRAM Burst Length @8 Clocks
Performance Acceleration Mode @Enabled
DRAM Idle Timer @AUTO
DRAM Refresh Rate @AUTO

Graphics Aperture Priority @AGP/PCI
Graphics Aperture Size @128MB
Spread Spectrum @Disabled
ICH Delayed Transaction @Disabled

MPS Revision @1.4


Advanced PCI/PnP Settings

Plug and Play OS @YNo
PCI Latency Timer @64
Allocate IRQ to PCI VGA @NO
Pallette Snooping @Disabled
PCI IDE Busmaster @Enabled

 

[Glavinsolo]

bump

 

[UK Frost]

That is a very high overclock for this ram at those kind of latencies.This will be the cause of the system hangs and lock ups.I would get everything to default speeds first to attain stability and then begin to overclock by small increments.

I would set your ram to:

CAS Latency 2
RAS Precharge 2
RAS to CAS 3 (try 2 later when stable)
Precharge 5
Burst Length 8

Leave the RAM speed to 200 and verify the settings with CPUZ.
With DOT and PAT enabled you should see the FSB increase without you manually adjusting the FSB.

Remember that your PAT feature will tighten the timings even more so when you lift the FSB you will be putting a lot of strain on the ram.

Leave the DRAM frequency on Auto and drop the voltage to something like 2.7 - 2.8/2.9 is right at the top for these sticks so you dont want to go any higher.

Failing that turn off your DOT and PAT functions until the system is stable and then you can retry at slightly higher latencies if you wish to overclock.

Try this board here for additional information specific to your motherboard.You will find many users with the same Mobo and the mods here are very good.

http://www.houseofhelp.com/for...isplay.php?forumid=128

In my experience with this ram i have always preffered tighter timings as oppose to higher FSB for gaming.The various benchmarks i have have proved this.Try both settings and choose which is better for you.Good Luck