Upgrade your system with more RAM to achieve a significant performance boost. The operating system and programs can be loaded directly into the main memory with sufficient RAM, making them particularly fast and readily available thanks to random access and access times in the nanosecond range. With insufficient RAM, the operating system and programs are swapped to the hard drive, where access times in the millisecond range are significantly higher. DDR4 brings several improvements in speed and performance compared to previous generations. A fourth-generation RAM module has more pins to connect to the motherboard to accommodate the higher speeds. Each DIMM has a direct line to the CPU controller to avoid delays or bottlenecks in data transfer from the CPU to the RAM. DDR4 also includes innovations that reduce power consumption and increase reliability.