Which uses more power, an HDD or an SSD?

Recent testing shows that contrary to popular belief, HDDs use less energy than SSDs in a wide range of scenarios.

SSD vs HDD: Making the Right Choice for Data Storage

Firm Claims HDDs Can Use Less Power Than SSDs

SSD or HDD Hard Drives: Which is Best for Your DC Metro Area Business?

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SSD vs HDD - Which One Should We Choose?