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4GB Compatible Memory Upgrade for Dell Studio XPS 13 (1340), Dell Studio XPS 16 (1640), (1645), (1647) DDR3 PC3-10600 RAM (PARTS-QUICK BRAND) - Walmart.com
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Dell XPS 13 9310 2-in-1 gets refreshed to include Intel Tiger Lake, Xe graphics, Evo, and Thunderbolt 4, but RAM and storage continue to be non-upgradeable - NotebookCheck.net News
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