What type of ram does the 690 take i have ddr2 but does not fit

Dell Precision 690
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More about type ram 690 ddr2 fit
  1. ddr2 only fits one way.there is a long end and a short end,dont know how else to explain it.your machine takes ddr2 so it has to fit.
  2. Best answer
    You need "Fully Buffered" (FB-DIMM) DDR2 RAM modules for the Precision 690.
    Standard DDR2 modules (Unbuffered) are notched differently, that's why they don't fit in an FB-DIMM slot.
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