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Post Memory Failure 2 Gbyte Twinx Matched Memory Pair


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I purchased two sets of DDR Corsair PC3200 2G TwinXpro. When I found time to install the memory I found that one module will not pass the BIOS memory test. I have narrowed it down to one of the modules. All three of the other modules work individually, in pairs and as dual channel pairs. This one module is definitely bad as the POST memory failure follows this module even in another computer. It is DOA.
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  • Corsair Employees
Can you tell me the exact model# of your memory module 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 if you have the latest BIOS installed on your system and the bios settings you have set for both CPU and memory and any performance settings that you may have set?
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model# of your memory module:

CMX1024-3200PRO XMS3200v4.1

XMS3200 1024 MB 400MHz 3338


make and model of MB:



the CPU speed:

(2) Xeon 2.4 GHz CPUs





The latest BIOS version 1008 is installed on the system


the bios settings for CPU:

CPU clock [133]

CPU Clock Ratio [18x]


the bios settings for memory:

Dram Frequency = Auto (during POST shows DDR 333)

Memory Timing Selectable [by SPD]

2.5 - CAS Latency Time

7 - Active to precharge delay

3 - Dram RAS# to CAS# Delay

3 - Dram RAS# Precharge


performance settings:

No performance settings - All at defaults

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  • Corsair Employees

Please make sure that you have the latest BIOS for your MB and load Setup/optimized default settings, and try the following BIOS settings;

TwinX1024 or TwinX512-3200

Advanced/Jumper Free

AI over clocking: Manual

CPU Freq: 133

DRAM Clock: 333 MHz

Memory or Dim Reference voltage: 2.75 Volts

System performance: Standard

AGP Voltage: Default *unless you have ATI (9200 or 9600) or NVIDIA (5200 or 5700) then 1.6 Volts suggested!*


Configure Dram timing by SPD: Disabled/User define

SDRAM CAS Latency: 3T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 8T

SDRAM Burst Length: 8

USB Legacy Support: Disabled

All other settings should be set to default settings!

Then please test them one at a time with http://www.memtest.org and let’s make sure it's not some other issue! I would run the test for at least 2-3 passes to be sure!

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That is all very good information but as I related in my first email that the module does not pass the POST.


How can I test the memory module when the memory does not pass the "Power on self test" AKA POST and computer is beeping the bad memory beep code???


The memory module is DOA! Please allow me to get an RMA and have this memory replaced. Since it is a matched pair I need to send back both modules and have them replaced as a matched pair.



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  • 3 weeks later...

:D: On a happy note:

I sent back the two modules under and RMA issued by Corsair and promptly received a new retail package as a replacement. The memory passed testing and has been working flawlessly since installation.


On another note:

:mad: Buyer Beware -

I was dismayed and feeling some what cheated to learn that "due to a resource allocation issue with the Intel ICH5R chipset" the system only detects 3.5 of 4 GB of memory. IT IS NOT A MEMORY MODULE ISSUE. It is, in my opinion, a chipset/motherboard design fault. The infomation is "buried" in the Asus PC-DL Deluxe motherboard manual on page 2-11.

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  • Corsair Employees
That will be correct; this is due to the PCI compliant specification limitation. Also when you have 4GB of memory installed on the system, if using windows XP; software has no problem recognizing the size of memory you have installed on the system, however due to XP software limitation that it will only utilize 2GB of the memory regardless on how much RAM you have installed on the system.
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