DDR4s

DDR4, or Double Data Rate 4, is a type of synchronous dynamic random-access memory (SDRAM) that was introduced in 2014. It is the successor to DDR3 memory and offers several improvements, including higher speeds, lower power consumption, and increased density. DDR4 operates at voltages of 1.2V, compared to the 1.5V and 1.35V of DDR3, leading to greater energy efficiency. The maximum theoretical data transfer rates for DDR4 are also significantly higher, with common modules reaching speeds from 2133 MT/s up to 3200 MT/s and beyond.

Key characteristics of DDR4 include its notched design on the connector, which prevents incorrect insertion into motherboards. It also utilizes a different pin layout compared to previous DDR generations, meaning DDR4 modules are not backward or forward compatible with DDR3 or DDR5 slots. DDR4 memory modules, known as DIMMs (Dual In-line Memory Modules) for desktops and SO-DIMMs for laptops, are available in various capacities. The increased density allows for larger amounts of RAM to be installed in a single module. DDR4 has been widely adopted in consumer electronics, servers, and high-performance computing systems due to its performance and efficiency benefits.