DDR1 Technology: ELPIDA Server RAM DDR1 4GB refers to a type of memory module that uses DDR1 (Double Data Rate 1) technology.Capacity: It has a total capacity of 4GB, which was considered quite large for DDR1 modules during its time.Server Grade: Designed specifically for server applications, emphasizing reliability, stability, and performance under continuous operation.Speed: DDR1 RAM typically operates at speeds ranging from 200 MHz to 400 MHz, depending on the specific module and configuration.