Which of the following is commonly used to measure the RAM capacity of a smartphone?

Modern smartphones require substantial Random Access Memory (RAM) to manage the operating system, background processes, and multiple concurrent applications. The capacity of RAM in contemporary devices typically ranges from 4 gigabytes (GB) to 16 GB or more. Therefore, the gigabyte is the standard and most common unit of measurement used to express smartphone RAM capacity. Using smaller units like megabytes would result in unwieldy numbers (e.g., 8,192 MB instead of 8 GB), while larger units like terabytes are far beyond the current technological scale for mobile RAM.

B. KB: Kilobytes (KB) are an extremely small unit of measurement, relevant to very early computing memory but insufficient for the demands of any modern operating system.
C. MB: Megabytes (MB) were used to measure RAM in early-generation smartphones but are now too small a unit for the memory requirements of current mobile applications and OS.
D. TB: Terabytes (TB) represent a massive amount of data, a scale currently associated with high-capacity storage drives (SSDs/HDDs), not the volatile RAM found in smartphones.

1. Patterson, D. A., & Hennessy, J. L. (2017). Computer Organization and Design RISC-V Edition: The Hardware Software Interface. Morgan Kaufmann. In Chapter 1, Section 1.4, the text defines the standard prefixes for powers of 1000 (kilo, mega, giga, tera) and powers of 1024 (kibi, mebi, gibi, tebi) used to quantify computer memory and storage capacity, establishing the scale for these units.

2. Google LLC. (2023). "Google Pixel 8 Pro Tech Specs". Google Store Official Documentation. Under the "Memory & Storage" section, the device is specified with "12 GB LPDDR5X RAM," officially confirming that Gigabyte (GB) is the standard unit for measuring RAM in current flagship smartphones.

3. JEDEC Solid State Technology Association. (2021). JESD209-5B, LOW POWER DOUBLE DATA RATE 5 (LPDDR5). In Section 3, "Density," the standard specifies individual memory chip densities in Gigabits (Gb). As 8 Gigabits equal 1 Gigabyte, this standard for mobile RAM components directly supports that total system RAM is quantified in Gigabytes (GB).