Inconsistency Between "Speccy" and "My Dell"

[Popolopolos]

While looking through Speccy on my laptop, I found it claimed my "DRAM frequency" to be ~665 MHz, which I thought to be low considering I used my laptop for playing games on. Upon double-checking in My Dell, which came with the laptop (it's a Dell in case you hadn't guessed), I saw that My Dell claimed my RAM to run at 1333 MHz, a figure I found more reasonable.

 

Either I'm misunderstanding the meaning of "DRAM frequency", and it means something different to what I'm thinking, or one of the two is reading it wrong.