If you have multiple XFINITY X1 TV boxes in your home, you most likely have a DVR and one or more non-DVR TV boxes. This article explains the differences between these TV boxes, including the XG1, RNG150N, XG2, Xi3 and other X1 equipment.
DVR vs. Non-DVR TV Boxes:
There are a few key differences between the DVR and the non-DVR TV boxes.
Use the examples below to identify your equipment.
X1 Non-DVR HDMI Only
*Pace XG1v1 only supports five DVR tuners
**NOTE: With non-X1 boxes you were able to take advantage of the eSATA port to expand the capacity of your DVR. However, with all X1 boxes we have either disabled or completely removed that port and that feature.**
Join the discussion here: http://forums.xfinity.com/t5/X1/X1-TV-Box-Comparison-DVR-vs-Non-DVR/m-p/2860183