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Only 4 of 6 gig visible (X58-UD5)


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Gigabyte X58-UD5, using the latest bios from last month, in combination with a CMX6GX3M3A1600C9 package.

When using one module BIOS and Win7x64 (msinfo32) is detecting 2 gig as expected.

When using two modules BIOS is detecting 2 gig but msinfo32 is detecting 4 gig installed but only two as available.

When using all three modules BIOS is detecting 4 gig but msinfo32 is detecting 6 gig installed but only 4 as available.


If I understand a previous thread the CMX6GX3M3A1600C9 should be the same spec. as the certified TR3X6G1600C9 but for some reason my mobo doesn’t like them.


I have tried them in a ASUS P6T and they were detected as expected and memtest86+ is indeed seeing all three modules under the Memory SPD Info but the actual Memory info in the app says 4095M and of course zero errors.



FYI I have set everything in BIOS to AUTO and I did the same with Asus board so it shouldn’t matter or?



Scratching my head on this one… so any ideas would be highly appreciated.




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