The 1GBx4 Kit of HYS64T DDR2 DIMM memory ram is designed for desktop PCs. Each module has a capacity of 1GB and operates at a bus speed of PC2-6400 (DDR2-800). This memory kit is ideal for upgrading your desktop computer's memory capacity, providing reliable performance for various computing tasks. With ECC memory features, this product ensures error correction for added data integrity and stability.