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CompTIA A+ Core 1 (220-1201)HardwareMedium

What is the maximum theoretical data transfer rate supported by the SATA III interface?

  1. A6 Gbps
  2. B10 Gbps
  3. C3 Gbps
  4. D1.5 Gbps
Show answer & explanation

Correct answer: A. 6 Gbps

SATA III (SATA 6Gb/s) supports a maximum theoretical transfer rate of 6 Gbps, which translates to roughly 600 MB/s of real-world throughput after encoding overhead.

Why the other options are wrong

  • B. 10 Gbps exceeds SATA III's specification and is closer to USB 3.1 Gen 2 speeds.
  • C. 3 Gbps is the speed of SATA II.
  • D. 1.5 Gbps is the speed of the original SATA I standard.

SATA III Speed

SATA III (SATA 6Gb/s) is the third generation of the SATA storage interface, supporting a maximum theoretical throughput of 6 Gbps.

  • SATA I = 1.5 Gbps
  • SATA II = 3 Gbps
  • SATA III = 6 Gbps (~600 MB/s real-world)

Memory trick: 1.5, 3, 6 — SATA speeds double each generation

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