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CM2X2048-6400C4DHX Weird / Rare problem


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I actually got a really weird and rare problem.




Look at the Slot1 and Slot3. They actually got different Part Number and different Frequency. I suspect there is something wrong with the RAM.


(Though, I actually suspect CPU-Z too; So, I have tested with other System Information software, which gave me the same result)


I decided to test them one by one. So, firstly I will put single ram (which was previously in Slot3) and look at the picture below.


Slot 1: (This is the correct one)




It is exactly the statistics of Corsair CM2X2048-6400C4DHX (400MHz at 4-4-4-12).


And below is the Vista Score (please look at the Memory Score)




It scores 5.1 in Memory.


Okay. Everything is done, so I changed to the other pair of RAM in. Ran the CPU-Z, and below is what I got


Slot 2: (The incorrect one)




As I expected, 8500C5D would be running at 533MHz (5-5-5-15) or 400MHz (5-5-5-18). It is not a Corsair CM2X2048-6400C4DHX. It must be something wrong with Corsair.


Same as the previous step, I ran the Vista Performance test. Below is what I got…




Surprisingly, it scores 5.6 in Memory (RAM). Clearly, it is really not a Corsair CM2X2048-6400C4DHX.


I will try to get some helps from where I bought it. Hopefully it could be solved (exchange a new one or whatever) easily =P


Just wanted to share around.


If you have any good solutions, or you are facing any similar problems, please reply here. Thanks =)


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Corsair CM2X2048-6400C4DHX Weird Rare Problem

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  • Corsair Employees

It looks like the one module was programmed improperly. I would set the following settings manually and then test the configuration with http://www.memtest.org to make sure you do not get any errors:


Memory Frequency: 1066MHz

Memory Voltage: 2.1v

TCL: 5


TRP: 5

TRAS: 15

Command Per Clock: 2T


If you have any problems, or if you would just feel more comfortable altogether getting the pair replaced, then we can do that for you. Please use the On Line RMA Request Form and we will be happy to replace them. Be sure to check the box that says “I've already spoken to Technical Support and/or RAM Guy.”

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