jfruh writes: The average price of a 4GB DDR3 memory DIMM at the moment $18.50 — a price that's far lower than at this time last year. Why is it so cheap? The memory business tends to go in boom and bust cycles, but the free availability of Windows 10 means that fewer people are upgrading their PCs, reducing RAM demand. Analyst Avril Wu said, "Notebook shipments in the third quarter fall short of what is expected for a traditional peak season mainly because Windows 10 with its free upgrade plan negatively impacted replaced sales of notebooks to some extent rather than driving the demand for these products." And prices might stay low for another two years.