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I have a bad stick of CMX512-3700PT


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I am running a matched pair of CMX512-3700PT (XMS3700v1.1 0326006-0) and one of my two stick has gone bad. I am running windows 2000 and it started crashing for no apparent reason. I tested both sticks of ram with mem test and one of the two returns errors. My machine runs perfect with only the one good stick of ram in and I tested both sticks when I first got them.


I am wondering if I have a matched pair if I need to get two new sticks or if i can get a single stick that will be compatible.


Please let me know if I need to replace both sticks or just one and let me know how I can return this bad stick for a good one.


Thank you for your help!! I am looking forward to getting my memory up and running agian. Let me know if you need any more information from me.


Thanks agian,


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I originally built my machine in September of this year and it ran great once I replaced my mother board. Prior to replacing my mother board I was having trouble. When I got my new mother board my ram tested fine with the timming settings you gave me. After three flawless months, my machine started crashing like crazy. In testing the ram, I found one of the two sticks has gone bad.


All of my system info is in my thread from September. Please give me an RMA so I can get new memory and get back to Half Life 2.




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  • Corsair Employees
Can you tell me 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?
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Thank you for your response!!


Here is the information you have asked for:


ASUS A8V Deluxe mb

xms twinx1024 3700PT Corsair Ram

ati x800

windows 2000 fully updated


CPU FSB is at 200 Mhz at a multiplier of 11 =2200 Mhz

Bios steeings for the processor are as follows:

CPU FSB is at 200 Mhz

Multiplier is set to auto (11)

the processor is not overclocked at all


bios settings for the memory have been as you suggested since September

the following is what you suggested then:

"The modules you have are NON ECC please load setup defaults and do not enable ECC! And I would try setting the Dim Voltage to 2.7 Volts as well!

memclock mode -auto

dram over remapping -diabled

bank interleaving -enabled

non interleaving -diabled

burst length -4 beats

cas lat cl -3

trc -auto

trfc -auto

trcd -4 clk Can Be 3CLK if you are not over clocking

twr -auto

trwt -auto

tras -8clk

trp -4 clk Can Be 3CLK if you are not over clocking

twcl -auto

async lat -auto

read preable setting -auto

2t command -auto


master ecc -disabled

dram ecc -disabled

dram bg scrub -disabled

ecc chip kill -disabled

l2 cache bg srcub -disabled

data cache bg scrub -disabled"


I was running trp & trcd both at four

Since my machine started crashing I reset all memory settings back to auto except for the burst length remaining at four just to see if it would stop the one stick from producing errors. (it made no difference)


I am not running anything overclocked or set for speed. My machine ran very stable for three months and then just started crashing like mad. I have tested both sticks in the same slot on my mb with memtest and the one returns errors while the other is running in my machine perfectly stable right now with no errors.


Let me know if you would like any further information or would like me to try anything else.


Thanks for your help, I greatly appriciate it!


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  • Corsair Employees

Let's try replacing your modules. Please send us a email with a copy of the form or all of your info name address and phone# and the Module part# and copy the link to this post and email it to Warranty@corsairmemory.com. Or you can also use the On Line RMA Request Form as well.

If after 1 day or 24 hours excluding weekends you do not get the rma please email the same to rma@corsairmemory.com and we will help to resolve it.

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Thanks for the help, I have an RMA number. I am now wondering if TwinX1024-4000PRO is compatible with TwinX1024-4000PT because I am considering buying some to keep my machine up while I send out my existing memory.

Thanks for all of you knowledge!


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