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twinx memtest fail

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Hi, I'm having a hell of time with this machine. the short story is memtest is failing a stick of 512 twinx, so far I've got 39+ errors listed. Ive got it on its own in a black slot to test it.

long story: Its in a p4c800 asus board with a 3gig cpu all running stock, no overclocking in the bios everything is set to standard and auto detect.

The system was designed to be a video editing machine and as such I did a lot of research to make sure that all the bits would talk to each other. MAtrox rtx 100 / parahelia it came preinstalled with XP and ran quite happily for a year or so. However one day it crashed (just continuosly reboots) and I cannot get XP installed again. When i boot to the XP cd I get checking hardware, then the initial blue screen with windows setup in the top left corner... and thats it just hangs there. Ive tried using 2 syspreped ghost images the XP one would'nt load at all but I couldn't catch the stop error. The second image was a clean win 2k with sp4 this failed during set up with BSOD Stop 0x50 Error PAGE_FAULT_IN_NONPAGED_AREA which according to this http://kadaitcha.cx/0x50_error.html could be just about anything. So I decided to check the memory thinking that it couldn't be that that ultra reliable corair stuff that cost me an arm and a leg could it...

BTW I have also removed all hardware that I can to isolate the prob, there is no rtx 100 at the moment and just one Hdisk.+CD

Cheers Bob

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Can you tell me our modules part# (How To Read the Memory Label) and the make and model of MB you have along with the CPU speed and it’s FSB as well? In addition, please tell me the bios settings you have set for both CPU and memory and any performance settings that you may have set?

Hi part number is cmx512-3200LL

mobo is AUS p4c800 (i think it might be the delux model)

cpu p4 at 3.0Ghz HT enabled

I'm not sure what FSB speed it is but ratio status is locked and ratio actual value is 15.


dram timing is by spd

performance acceleration is auto

dram idle timer is auto

dram refresh is auto


performace mode is standard

AI overclock is standard


all on board devices are currently disabled sound/nic/raid/firewire

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Please make sure that you have the latest bios and then load setup defaults and set the following settings manually.

AI over clock Tuner: Manual

DDR Frequency: 200 MHz/DDR400

DDR Reference Voltage 2.75 Volts

Performance Mode: Auto

Performance acceleration is auto

Legacy USB: Disabled

SDRAM CAS Latency: 2T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 2T

SDRAM Active to Precharge Delay (tRAS): 6T

Then please test the suspect module with http://www.memtest.org, but with this MB or any ASUS P4 MB you may need to disable legacy USB when running any memory test.

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