How to check your RAM All Detail, Speed, Manufacturer, Capacity, Frequency, DDR3 or DDR4 - YouTube
Compare DDR3 speeds with this chart. : r/hardware
G.SKILL Releases The World's Fastest DDR3 32GB (8GBx4) Memory at 3000MHz Extreme Speed Designed for 4th Gen Intel Core Processors and Z87 Motherboards - G.SKILL International Enterprise Co., Ltd.