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Legacy RAM Kit (3 x 4 GB) CMT12GX3M3A2000C9 issue


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Dear forum member,

my apologies if I'm posting in the wrong section but I haven't found any specific legacy RAM section where to post my question.

I'm experiencing a strange behavior with the following RAM Kit CMT12GX3M3A2000C9 (v8.16).

The system I'm testing (legacy) is based on:
* Gigabyte X58A-UD5 (rev 2.0)

* Intel Xeon X5675
* EVGA GTX 1080 TI FTW3

* Corsair CMT12GX3M3A2000C9 (v8.16)
* Corsair AX860

In a nutshell, if I reset the motherboard to default values (i.e.: CMOS reset) and i plug each RAM module one by one (singularly) the system does not boot at all (black screen) or give some long beeps.
This happens with all 3 RAM module tested one by one.

I made the same test with another
CMT12GX3M3A2000C9 kit (but with v5.11) and with a CMZ8GX3M2A1600C9 kit (v5.11) and the system boots fine.
I noticed that the default motherboard BIOS valuse have XMP disabled.

When the system boots correctly with the v5.11 RAM, I'm able to manually configure the RAM to whatever value I prefer (e.g. no XMP, 1600 Mhz 9-10-9-27-2T) and then, if I plug again the RAM kit previously failing to boot, they now work properly and can even pass a 12 hours memtest86 or memetest86+ test.

I'm wondering if this is normal and the issue is related to maybe a different XMP management in the RAM kit v8.16 or if it is possible that all 3 RAM sticks are damaged.

Thanks in advance for any hints.

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  • Corsair Employees

Have you tried to clear your motherboard CMOS before installing that specific kit alone in the system?

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34 minutes ago, Corsair Notepad said:

Have you tried to clear your motherboard CMOS before installing that specific kit alone in the system?

Yes I did. CMOS reset, power unplugged, battery removed and default BIOS values loaded after the reset.

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