WD Blue (WD40E31X) 4TB PC SSHD Review
 

As per WD, this drive uses a set of algorithms which tracks data usage and prioritizes part of the data which is frequently used using the 8GB NAND. One of such uses (as WD highlighted) is for gaming. With this algorithm and the 8GB NAND, it would provide lesser loading times compared to traditional hard drives. With a much larger capacity and value still towards mechanical drives (for now), gamers can keep a large amount of games stored away in the drive.

http://www.hardwarebbq.com/wd-blue-w...c-sshd-review/