This memory kit from Kingston includes 2 modules of 512MB DDR2 SDRAM, which totals to 1GB of memory capacity. The memory features ECC technology for enhanced reliability and stability. The modules have a 184-pin DIMM form factor and a bus speed of PC2-3200 (DDR2-400), making them suitable for use in servers and enterprise networking environments. The modules are branded Kingston and have a model number of KVR400X72C3A/512. They are ideal for upgrading or replacing memory in server components. With this kit, you can enhance the performance of your server without worrying about the condition of the memory.