SSD's utilize flash memory chips allowing faster and more direct access. SSD's also have more predictable and consistent wear across the chips as data is saved using an algorithm designed specifically so that wear to the chips occurs at an even rate. NVMe, or Non-Volatile Memory Express is a technology used in the newest type of SSD.
NVMe SSD's Defined & Why they are Worth the Expense
What is NVMe?
NVMe is a logical device interface designed specifically for use with SSD's. As a result, NVMe is better prepared to handle the faster response times in addition to the multiple streams of data that SSD's can process, unlike their serial HDD counterparts. In other words, traditional hard drives process singularly while solid state drives can process paralleled or multiple streams at once, much like the difference between a single CPU versus a dual or quad-core CPU.
How does NVMe work?
In the image below created by Intel, you can clearly see the differences in response times of the different types of drives and their corresponding connector types.
As with anything tech, newer technologies usually cost more but often become the norm over time. If you are purchasing a new device and efficiency or response times are an important factor in your purchase, you should seriously consider an SSD using NVMe. With all other factors the same, an SSD using an NVMe connector is going to be much more responsive than an SSD using a SAS or SATA connection as a result of removing the controller latency associated with SAS and SATA.
As always, technology continues to change, new acronyms become everyday language and keeping up is not only important, it is vital in knowing where to spend your hard earned dollars!