ddr3 Memory speed classifications

[chrisNova777]

https://www.kingston.com/en/memory/ddr3-1600
https://media.kingston.com/pdfs/HyperX_Blu_EN.pdf

Rather than give memory modules catchy names, the industry refers to modules by their specifications. But if you don't know a lot about memory, the numbers can be confusing. Here's a short summary of the most popular types of memory and what the numbers refer to.

Generations of memory explained
For double-data-rate memory, the higher the number, the faster the memory and higher bandwidth. Occasionally DDR memory is referred to by a "friendly name" like "DDR3-1066" or "DDR4-4000." When written this way, the number after "DDR" represents the generation. The number after the generation refers to the component's data transfer rate per second (/s). When referenced by the industry name, the numbers that follow "PC" and the generation refer to the total bandwidth of the module.

800 (DDR3-800)
PC3-6400    
6400 MB/sec. or 6.4 GB/sec

1066 (DDR3-1066)    
PC3-8500
PCL-8500    
8500 MB/sec. or 8.5 GB/sec

1333 (DDR3-1333)    
PC3-10600
PC3L-10600    
10600 MB/sec. or 10.6 GB/sec.

1600 (DDR3-1600)    
PC3-12800    
12800 MB/sec. or 12.8 GB/sec.

https://en.wikipedia.org/wiki/DDR3_SDRAM
https://www.crucial.com/support/memory-speeds-compatability