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Solid state drives write the data into memory cells. This cells are made of floating-gate transistors.
Single Level Cell (SLC)
SLC flash memories store only one bit of data in a single cell. Each cell stores one bit. So SLC memories are capable of faster write. SLC also has the advantage of higher cell endurance and lower power consumption. Although SLC technology has so many advantages, it costs more than MLC. SLC technology is chosed for servers and heavy applications by companies.
Multi Level Cell (MLC)
MLC flash memories store generally three or more bits in a single cell. Because of the high cost of manufacturing SLC memories, MLC technology is designed. MLC memories are generally cheaper than SLC memories. However, they have higher power consumption, lower cell endurance and slower transfer speed rates. SLC technology is chosed for desktop and laptop computers by home users.