Transcend 420S 480GB SSD features M.2 2242 SATA III 6Gb/s bus interface. It delivers optimal reliability. It comes in with a 3D NAND flash that is developed to break through density limitations of the 2D planar NAND, and thus can deliver a greater level of performance and endurance. It has a Sequential Read/Write speed of up to 530/480 MB/s and 4K Random Read/Write of up to 50,000/75,000 IOPS that deliver incredibly short loading times and almost instant response for heavy graphics and multimedia applications. It is compliant with M.2 form factors Type 2242 and 2280, Transcend's 3D NAND M.2 SSDs are perfect for use in Ultrabooks and lightweight notebooks. Measured at just 42mm in length, the M.2 SSD 420S makes for an easy upgrade to your computer, taking up little space while giving it a much-needed energy boost. Featuring the M.2 standard (42mm), the next-generation SATA III 6Gb/s interface, and a powerful controller. When used as a cache, the M.2 SSD 420S provides 1.5 times faster boot time than conventional hard drives. Despite its extra-small dimensions, the M.2 SSD 420S contains advanced features to enhance the performance of the SSD. Engineered with a RAID engine and featuring built-in SLC caching technology, it utilizes LDPC coding to correct errors and ensure data integrity. It has 3 years of warranty.