DDR3 SDRAM has six different standards one of which has a Clock rate (the frequency at which the clock generator) of 50.
Double Data Rate 3 Synchronous Dynamic Random-Access Memory, officially abbreviated as DDR3 SDRAM, is a type of synchronous dynamic random-access memory (SDRAM) with a high bandwidth ("double data rate") interface, and has been in use since 2007. 100 400 133 533 166 666 200 800 233 0933 266 1066 
