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Problem with using all 4 ram slots


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OK so I have a DFI Lanparty NF4 sli-dr board, and 4 sticks of Corsair ram. All 4 sticks are XMS3200, 2 of them are 1gb (Twinx2048-3200C2PT) and the other 2 are 512 sticks that are different revisions.


When I use either set (the 2x512, or the 2x1gb) in dual channel, in either channel, it works perfectly fine. When I have all 4 sticks in, it seems like only one channel keeps working. So depending on which set I have in which channel, I have either 1gb or 2gb of ram when all 4 sticks are in.


Right now I have all 4 sticks in, the 512's are in banks 1 and 3, and the 1gb's are in banks 2 and 4 and my system shows 2gb's of ram total. If I switch them, it shows 1gb total.


Am I just missing a jumper or bios setting? Hopefully all that made sense :P.

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All of the modules should be matched for this MB if the modules SPD's do not match the Memory Controller in the CPU will just ignore the other memory.

Just use the Two one gig modules for best performance.


If that's the case, why do the two 512 modules work together?

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