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Mixing XMS2702v1.3 and XMS3205Lv1.1


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I have the following:


1 X 512 Meg CMX512-2700C2PT (XMS2702v1.3)


2 X 256 Meg CMX256A-3200LLPT (XMS3205v1.1)


I am trying to run them as follows on an ABIT NF7-S v2 (NForce2 chipset) (The good one with 3 memory slots)

slot 3: 256 Meg CMX256A-3200LLPT

slot 2: 256 Meg CMX256A-3200LLPT


slot 1: 512 Meg CMX512-2700C2PT


I have confirmed that this should be the proper configuration to get the 2 X 256 meg sticks to run one one channel, and the 512 meg stick to run on the second channel.


I am having issues getting it to run stable. System powered off by itself and would not power on until I reset the BIOS and did a cold boot.


I tried to run the same board/system just on the 512 Meg CMX512-2700C2PT stick in slot 1 or slot 3 for a couple of months, and had intermittent issues which required me to reset the BIOS to get the system to post.


RamGuy, if you're around, I would love any help/suggestions you might have for me.

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I may have badly explained myself.


On the NF7-S, you can run the memory in single channel or dual channel.


If you populate slots 1 and 3 the you have both channels being used. If you populate slot 1 and 2, then your memory is running in single channel mode.


What I want to do is to run the TwinX kit (2 X 256) in slots 1 and 2, so that they occupy the first channel. I then also want to use the CMX512 stick in slot 3. This stick will run off the second channel.


I plan to drop my FSB to 166, so that the DDR333 memory will not be overclocked, and plan to slacken the timings to 2.5-3-3-7.


This should give me a total of 1 Gig of ram, utilizing both memory channels of the chipset.

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As I said, I don't think this will work. However, if your MOBO manual says it will, give it a try. What you are asking your MOBO to do is to allow 1 memory channel to operate in dual channel and the other channel to operate in single channel. I don't know of any MOBO that will actually do this.


But, give it a try if you like. I don't see how it will actually damage your hardware.

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