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CM2X2048-8500C5D Won't post in K9A2


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I recently purchased 4 sticks of CM2X2048-8500C5D and placed them in a MSI K9A2-CF with a Phenom 9850 and a 700mw PS. I have tried everything I can think of and I cannot get this mem to post in this MB. I tried swapping CPU/PS/and Video to no avail. System works well with different mem and the CM2X2048-8500C5D works in a different MB. So I know both components are good and according to everything I've read they should be compatible. I tried clearing the CMOS as well as manually specifying the speed. I am however a little confused by the 5-5-5-15 2T timing. I understand the basic concepts but the BIOS has more than 5 settings in the memory timing page and I cannot find an explanation in exact terms for what settings the 5-5-5-15-2T correlate to in the BIOS. Like I said the BIOS has more to set than just the five settings all of them with a 3 letter acronym. And it seems that it should at least POST with the auto setting from the SPD.
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