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What do SLC, MLC, TLC and QLC mean for SSDs? How to choose when installing
What do SLC, MLC, TLC, and QLC mean for SSDs? How to choose when installing
We always have a lot of options to look at when choosing an SSD. Unlike a mechanical hard drive, there is no need to consider anything other than capacity, size, and interface. Solid state drives are more complex. The above parameters should also be paid attention to, and there are many other parameters that need attention, such as four types of flash memory in title.
Let's introduce one by one, SLC: (Single-Level Cell), that is, each memory can store 1-bit data, fastest and most durable, but most expensive, commonly used in commercial SSDs, about 100,000 times erase and write services are earliest type of solid state storage and most of our U disks use this method of solid state storage as well. MLC: Multi-level cell, that is, memory can store 2-bit data. This is first step for solid-state storage particles to move to hard disks. As storage density becomes higher, it can be used to make hard disks. Speed is average, life is average, and price is average. , about 1000--3000 life erasure.
TLC: three-level cell, that is, memory can store 3-bit data, speed is low, service life is short, price is low, and service life is about 1000 times of erasing and writing. This is flash memory type of most SSDs today. QLC: Quadruple cell - 4 bits per cell. The product has just been launched, mainly for hard mechanical hard drives. Capacity usually starts at 500 GB. The capacity is largest, but service life is shortest, speed is also slowest, and price is relatively cheap, but there are not many products.
We are currently selecting a few TLC or QLC SSDs. MLC price is too high. SLC is not produced by many manufacturers and capacity is not large, so TLC or QLC SSDs are more suitable for daily use. QLC is currently everyone is worried about service life, but life of SSD is directly proportional to capacity, because life of each unit of storage is limited, and every time it is erased and written, service life will be shortened, so using a large capacity QLC will extend overall life. This is also reason why QLC usually starts at 500GB. If you have enough funds, it's not a problem to buy a 1T solid state and use it for more than a decade.
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