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Samsung M378B5173DB0-CK0 4GB PC3-12800U-11-13-A1 1600MHz 1Rx8 240pin DIMM Desktop Non-ECC DDR3 Memory - Discount Prices, Technical Specs and Reviews [Samsung, M378B5173DB0-CK0, PC3-12800U-11-13-A1, 4GB, 1Rx8, Non-ECC DDR3 Memory, Specs, Reviews] - £9.95 :
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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
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RAM chips are changing. Here's how 2021 ROG laptops are affected | ROG - Republic of Gamers Switzerland
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DUOMEIQI 16GB 1rx8 DDR4 2400 MHz SODIMM RAM PC4-19200 (PC4-2400T) CL17 1.2V 260-Pin Non-ECC Laptop RAM Memory Module at Amazon.com
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