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      What is the correct DIMM slot order to populate additional memory DIMMs - ThinkPad W510, W701, W701ds

      Symptom

      When buying additional memory DIMMs for ThinkPad W510 and W701/ds systems, Lenovo recommends that you populate the memory DIMM slots in the following order to take advantage of the best system performance. This memory DIMM slot order is optimized for dual channel memory configurations.

       

      Affected configurations

      Any of the following ThinkPad systems with more than one, but less than four, memory DIMM slots populated.

      • W510
      • W701, W701ds

       

      Solution

      For ThinkPad W510 systems, populate memory DIMM slots in the following order:

      • For systems with only 1 memory DIMM installed, populate DIMM Slot 0 (the lower memory DIMM slot underneath the keyboard).
      • For systems with 2 memory DIMMs installed, place the largest memory DIMM capacity into DIMM Slot 0, and place the second memory DIMM in DIMM Slot 1 (the memory DIMM slot under the DIMM door on the bottom of the system nearest the optical drive).
      • For systems with 3 memory DIMMs installed, place the largest memory DIMM into DIMM slot 0, place the second largest DIMM in DIMM slot 1, and place the third memory DIMM in DIMM Slot 2 (the lower memory DIMM slot underneath the keyboard).
      • For systems with 4 memory DIMMs installed, place the largest memory DIMM into DIMM slot 0, place the second largest DIMM in DIMM slot 1, place the third largest DIMM in DIMM Slot 2, and place the fourth DIMM in DIMM Slot 3 (the memory DIMM slot underneath the DIMM door on the bottom of the system nearest the 1394 port).

        w510.jpg

      For ThinkPad W701/ds systems, populate memory DIMM slots in the following order:

      • For systems with only 1 memory DIMM installed, populate DIMM Slot 0 (the lower memory DIMM slot underneath the keyboard).
      • For systems with 2 memory DIMMs installed, place the largest memory DIMM capacity into DIMM Slot 0, and place the second memory DIMM in DIMM Slot 1 (the lower memory DIMM slot underneath the keyboard).
      • For systems with 3 memory DIMMs installed, place the largest memory DIMM into DIMM slot 0, place the second largest DIMM in DIMM slot 1, and place the third memory DIMM in DIMM Slot 2 (the memory DIMM slot underneath the DIMM door on the bottom of the system nearest the optical drive).
      • For systems with 4 memory DIMMs installed, place the largest memory DIMM into DIMM slot 0, place the second largest DIMM in DIMM slot 1, place the third largest DIMM in DIMM Slot 2, and place the fourth DIMM in DIMM Slot 3 (the memory DIMM slot underneath the DIMM door on the bottom of the system nearest the 1394 port).

        w701.jpg

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      • Alias ID: MIGR-75886
      • Document ID: HT002634
      • Last Updated :17 Jun 2014
      • © 2015 Lenovo