1 GB DDR3-1600
Buffalo has taken a different approach with the DriveStation DDR. It's a standard hard disk, in our case a 2 TB 7200 rpm Seagate Barracuda 7200.14 in an external case. It looks pretty normal, even if there's a little fan in the back, but there are other hard disks with fans out there. The PCB is a lot more complex, however, compared to a standard hard disk. It contains an ARM processor that serves as controller, and we see 1 GB DDR3-1600 Hynix memory.
When you connect it to a computer it works like normal external hard disk. The performance is fine, but nothing extraordinary. To fully take advantage of the DriveStation DDR you need to install a driver. When you use that program (currently available for most Windows versions) to copy a file, you get a special TurboEX window which tracks the progress.