a similar but unique motherboard connection to M.2 but are available in 2.5” form factors like most SATA SSD drives. They share a lot of the same performance characteristics as M.2 as we’ll discuss shortly, but are not interchangeable.

In previous posts, we’ve covered the difference between certain storage interfaces like SATA, M.2, and NVMe. With the continued proliferation of U.2 on higher end motherboards and newer chipsets, the time has come to compare M.2 vs U.2 as well – how are they same, different, and which is best for you?

Even though they use unique port types, both NVMe M.2 and U.2 use the PCIe bus with x4 lanes to connect electrically to the PC. This means both have the same potential bandwidth that interface allows – 32 GB/s for PCIe 3.0. So though there may be some performance gaps from model to model when comparing M.2 and U.2, both types of drive will be in the same range due to a lack of limitation from the bus like a SATA drive will have.

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CYLINDRICAL - Synonyms, related words and examples | Cambridge English Thesaurus.

The Unicode CJK Compatibility block contains square forms of some Japanese katakana measure and currency units. U+3348 ㍈ SQUARE MIKURON corresponds to ミクロン mikuron.

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The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures;[1] SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron,[2] is a unit of length in the International System of Units (SI) equalling 1×10−6 metre (SI standard prefix "micro-" = 10−6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.00004 inch).[1]

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U.2 is another SSD form factor once relegated exclusively to high end workstations and server motherboards but has become more mainstream with recently released chipsets. U.2 drives use

The term micron and the symbol μ were officially accepted for use in isolation to denote the micrometre in 1879, but officially revoked by the International System of Units (SI) in 1967.[8] This became necessary because the older usage was incompatible with the official adoption of the unit prefix micro-, denoted μ, during the creation of the SI in 1960.

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In American English, the use of "micron" helps differentiate the unit from the micrometer, a measuring device, because the unit's name in mainstream American spelling is a homograph of the device's name. In spoken English, they may be distinguished by pronunciation, as the name of the measuring device is often stressed on the second syllable (/maɪˈkrɒmɪtər/ my-KROM-it-ər), whereas the systematic pronunciation of the unit name, in accordance with the convention for pronouncing SI units in English, places the stress on the first syllable (/ˈmaɪkroʊmiːtər/ MY-kroh-meet-ər).

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That answer depends on you. For most users with regular storage needs of 2TB or less, an M.2 NVMe like the Samsung 980 Series is fast, widely available, and the best choice. But for users in need of more high storage in either a single drive or RAID array, the scalability of U.2 is likely appealing, assuming the motherboard supports them.

M.2 is often used to describe both the SSD form factor and the connection that SSD uses to connect to the motherboard. M.2 drives are small – about the size of a 5-piece pack of gum and can come in SATA versions like the Crucial MX500 and NVMe versions like the Samsung 980 Pro.

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The official symbol for the SI prefix micro- is a Greek lowercase mu.[12] Unicode has inherited U+00B5 µ MICRO SIGN from ISO/IEC 8859-1, distinct from the code point U+03BC μ GREEK SMALL LETTER MU. According to the Unicode Consortium, the Greek letter character is preferred,[13] but implementations must recognize the micro sign as well for compatibility with legacy character sets. Most fonts use the same glyph for the two characters.

The nearest smaller common SI unit is the nanometre, equivalent to one thousandth of a micrometre, one millionth of a millimetre or one billionth of a metre (0.000000001 m).

The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria,[1] and for grading wool by the diameter of the fibres.[3] The width of a single human hair ranges from approximately 20 to 200 μm.

Before desktop publishing became commonplace, it was customary to render the symbol μ in texts produced with mechanical typewriters by combining a slightly lowered slash with the letter u. For example, "15 μm" would appear as "15/um". This gave rise in early word processing to substituting just the letter u for the symbol if the Greek letter μ was not available, as in "15 um".[14]