Computer memory (RAM)
Adding RAM is often the cheapest meaningful upgrade for a computer that hesitates when switching between windows. The category lists DDR4 and DDR5 modules for desktops and SO-DIMM memory for laptops, at various frequencies and timings. Before buying, confirm which memory type your motherboard supports, how many slots are free and what the maximum capacity is. For office work 16 GB is usually enough; gaming and video editing are happier with 32 GB or more. Install modules in pairs where possible - dual-channel mode delivers a noticeable performance gain.
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