The SK Hynix 4GB 1Rx8 PC3-12800U-11-13-A1 (HMT451U6BFR8C-PB) memory module is a DDR3 SDRAM DIMM with a total capacity of 4GB spread across one module. With a bus speed of PC3-12800U (DDR3-1600) and ECC memory features, this module is designed for reliable performance in various computing environments. The 240 pins make it compatible with a wide range of systems, ensuring seamless integration into your computer setup. Upgrade your memory capacity with this high-quality SK Hynix module for enhanced performance and efficiency.