The PNY DDR3-1333 Desktop RAM Memory is a set of two 4GB modules with heatsinks, totaling 8GB of RAM capacity. These DIMM modules are designed for desktop use with a DDR3 SDRAM type and a bus speed of PC3-10600 (DDR3-1333). The PNY brand ensures quality and reliability, making it a suitable choice for upgrading or replacing existing RAM modules in a desktop computer.