(Please patience to read this description, I believe you choose SSD will certainly be helpful) 

There are three kinds of particles SSD 

SLC (intel-end), MLC (this paragraph, Kingston SV300) and TLC (Samsung 840 series) 

X3 (3-bit-per-cell) architecture is an extension of TLC MLC chip technology and techniques TLC, the earliest techniques NAND Flash architecture is SLC (Single-Level Cell), the principle is the one memory storage unit (cell) in storage of 1 yuan (bit) of information until after the MLC (Multi-Level Cell) technology taking over, architecture evolved into a memory storage unit to store two yuan. 

2009 TLC architecture officially come out, on behalf of a memory storage unit can store three yuan, significantly reducing costs further. 

As in the previous wave of technology transfer SLC MLC technology trends like, this is by NAND Flash manufacturers Toshiba (Toshiba) triggered the war, after Samsung Electronics (Samsung Electronics) also quickly joined the fray, making the whole lot of TLC technology being used in mass production and terminal products. 

TLC chips although larger storage capacity, low cost a lot, but because the performance is also greatly reduced, and therefore can only be used on a low-level NAND Flash related products, like low-speed flash memory card, compact flash drives or memory cards microSD, etc. 

Like embedded century liquid applications, smart phone (Smartphone), solid-state hard drive (SSD) technology threshold is high, the effectiveness of stress for NAND Flash application products, such as high speed and without error, be sure to use SLC or MLC chips. 

The main driving force for growth in 2010 NAND Flash market from smart phones and tablet computers, both must use SLC or MLC chips, so these two chips are in short supply, but TLC is continuing oversupply of chips, and the the average price pull down the entire industry, making the market research firm iSuppli in the second quarter of 2010 statistics global NAND Flash output, the size of the market shrink a rare happening, down from 2010 first quarter $ 4.3 billion to $ 4.1 billion, reduction of 6.5%. 

SLC, MLC, TLC difference U disk flash memory chips used in MP3: 

     SLC = Single-Level Cell, namely 1bit / cell, long fast life, the price of ultra-expensive (about MLC 3 times higher than the price), about 100,000 times Endurance 

     MLC = Multi-Level Cell, namely 2bit / cell, the speed of the general life in general, prices in general, about 3,000 --- 10,000 Endurance 

     TLC = Trinary-Level Cell, namely 3bit / cell, also called Flash manufacturers 8LC, slow life is short, cheap, about 500 times rewritable life, there is no manufacturer can do it 1000 times.