The Intel X25-M was a line of Serial ATA interface solid-state drives (or SSDs) developed by Intel for personal computers, announced in late 2008. The hard drive was a multi-level cell solid state drive available in a 2.5" form factor, came in 80 GB and 160 GB capacities and utilized NAND flash memory on a 50 nm process. The second generation hard drive which was called the "X25-M G2". The X25-M G2 was also available in a 2.5" form factor and 80 GB and 160 GB capacities, but with NAND flash memory on a more efficient 34 nm process.
Around May 2008, rumors and various leaks about a possible mainstream affordable SSD released by Intel surfaced. A couple weeks after, Intel indirectly confirmed the rumors by releasing a promotional video. Intel then released its X25 series of SSDs which consisted of three different drives: The X25-V, X25-M, and X25-E. The letter after each name stands for value, mainstream, and extreme respectively. The X25-M was released in an 80GB capacity with 50 nm NAND flash memory in a 2.5" form factor. The 160 GB capacity version came out several months after. Intel then released a 34 nm flash memory version in the middle of 2009. Because Intel used the same exact name for these new drives, the consumers nicknamed the 34 nm SSDs as the "X25-M G2". A third generation drive called the "X25-M G3" was rumored to come out in late 2010 but was delayed until early 2011. However, a blog said it was quietly sold on Taobao, a Chinese eBay-esque website.
Before the X25-M was released, all of the multi-level cell (MLC) drives were the same piece of hardware, but with a different company logo on it. This is called rebranding, which happens often in the computer hardware market, but Intel opted to develop its own MLC drive. The most notable feature about the X25-M is how well it performed in comparison to other MLC and single-level cell (SLC) SSDs. SLC drives are naturally more efficient than MLC drives, however Intel's unique architecture for this MLC drive was much more efficient than the typical MLC drive.