MemoryMasters Compatible 4GB 1333MHz DDR3 Single Rank DIMM Memory for Desktops (KTD-XPS730BS/4G) - Walmart.com
Beware of the single rank x16 RAM kits sneaked in some laptop models! The 1Rx16 modules have significantly lower bandwidth compared to the 1Rx8 variants - NotebookCheck.net News
Single Rank vs Dual Rank RAM: Differences & Performance Impact
Mem/4GB 1333MHz SODIMM Single Rank 4GB DDR3 1333MHz Memory Module at Amazon.com
647871-B21 HPE 4GB PC3L-10600R Single Rank X4 DDR3 Memory