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Bad stick of XMS3500 (CMX512-3500C2PT)

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I posted a thread looking for help with a pair of Platinum Series CMX512-3500C2PT CL2 on an Asus P4P800 motherboard, P4 2.4c. After extensive troubleshooting as described below, it looks like one of the sticks is bad.


I ran Memtest-86 (version 3.2 from bootable CD) with all motherboard settings at the defaults & received one error (Test 3) at the SPD settings 2.5-3-3-8, RAM at 200 MHz (DDR 400). Memory in Dual Channel Mode, PAT disabled. This with both sticks in the “blue” slots. The error was always at 534.4 mb. I swapped slots & the error remained.


CPU temps around 85 degrees Fahrenheit.


I removed one stick, leaving one stick in the blue slot closest to the CPU (I will identify as DIM #1) & Memtest86 failed at test 3 at 278.1mb. I moved it to the other blue slot & received the same result.


I removed DIMM #1 & installed DIMM #2. It passed several passes of Memtest86; all 7 tests in both slots. With this DIMM installed, I can adjust various BIOS settings, including the memory voltage to 1.75v & the CAS to 2.5-3-3.7. Prior to this the system would not even boot unless all settings were at the defaults.


Then to be sure, I installed a pair of 128mb PC2100 CL2.5 DIMMs of unknown brand (Dell pulls) this RAM worked in Dual-Channel mode at the same CAS settings as the one good stick of Corsair & passed several passes of Memtest86.


Both sticks of RAM have the same markings & were purchased from the same vendor (Newegg) at the same time. I am outside the RMA period for Newegg.


Markings on the RAM;


CMX512-3500C2PT XMS3500 512MB 433MHZ CL2 XMS3502V1.1 0333027.


Thanks RAM GUY!



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  • Corsair Employees

Dave please try and set the Dim Voltage to 2.75 Volts and make sure legacy USB is disabled as well. If you have done this and still have that error, I would suggest we get both modules replaced.

Please follow the directions under "I think I have a bad module" under this forum or if you have trouble, 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 Rma@corsairmemory.com.

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

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Thanks for your prompt reply RAM GUY!


I have followed the recommendations you have made regarding the SDRAM voltage being set to 1.75 volts & disabling Legacy USB. I found your recommendations in another thread & followed them before posting here.


As you suggest, I will submit an email RMA application.


Thanks for your help!



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