Upgrade your desktop with this Samsung 4GB DDR3 SDRAM memory module, model M378B5173DB0-CK0. With a bus speed of PC3-12800 and frequency of 1600MHz, this non-ECC unbuffered memory module is compatible with most desktop computers. The 240-pin DIMM form factor makes installation easy, and the lifetime manufacturer warranty ensures long-lasting performance. It has a total capacity of 4GB with one module and a capacity per module of 4GB. This item is ideal for anyone looking to boost their computer's memory without breaking the bank.