The OCZ Technology PC2-6400 1GB DDR2 SDRAM Memory modules are designed for high performance in computer systems. With a bus speed of PC2-6400 (800 MHz DDR2), these DIMM modules provide fast data transfer rates. The OCZ brand is known for its quality and reliability, making these memory modules a good choice for upgrading your system's memory capacity. Each module contains 1GB of memory, and the set includes two modules for a total of 2GB of RAM. Perfect for increasing system speed and multitasking capabilities, these memory modules are a great addition to any computer system.