Lot of 4pc Mixed 2GB 1Rx8 -2Rx8 PC2 - PC3; 1GB 2Rx16 PC2 - PC3 Laptop RAM Memory | eBay
Hynix 1GB PC2-6400 8c 64x16 2Rx16 SODIMM at Amazon.com
What is the difference between the RAM labeled '1Rx8 PC3L-12800S-11-13-B4' (inside the laptop) and '2Rx8 PC3-12800S-11-11-F3' (planning to buy)? - Quora
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