I've upgraded my iMac's memory/RAM but... | MacRumors Forums
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
1Rx8 vs 2Rx8: A Detailed Comparison Guide Between the Two RAMS
Samsung Memory for Laptop Replacement 4 GB 2Rx8/ 1RX8 NWOT Lot of 4 | eBay
Lot of 33 Mixed Hynix Samsung Nanya 1GB 1Rx8 2Rx8 PC3-10600S RAM Memory • TechRenew