DDR4 RAM memory types are typically identified by a + in the memory type field. This indicates that the RAM is compatible with DDR4 technology.


If you are preparing to replace hardware in your computer or build one of your own, then some of the supported memory types shown for motherboards may be a bit confusing. What does the “+” that is sometimes shown for DDR4 RAM really mean? Today’s SuperUser Q&A post has the answer to a confused reader’s question.

Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites.

Photo courtesy of Tecnomovida Caracas (Flickr).

The Question

SuperUser reader Karl Richter wants to know what the “+” in supported DDR4 RAM memory types means:

What does the “+” in supported DDR4 RAM memory types mean?

The Answer

SuperUser contributor Yass has the answer for us:

Have something to add to the explanation? Sound off in the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.

This article provides a good explanation of memory timings (i.e. 9-9-9-24):

Memory Timings/Latency Explained