The main notable improvements that DDR4 makes over its predecessor, DDR3, are a greater range of available clock speeds and timings, lower power consumption, and reduced latency. With DDR3, the options for your clock speed (i.e., how fast the RAM can read or write data) are primarily geared to one of four different choices: 1333Mhz, 1600Mhz, 1866Mhz, and 2133Mhz, with 2133Mhz being the maximum limit. RELATED: Does Memory Become Slower if Increased in Size? Right now, there are three main types of RAM you can buy for a consumer-grade custom PC: DDR3, DDR3L, and DDR4.
