paperweight

noun3

1. •
   A small, decorative, somewhat weighty object placed on one or more pieces of paper to keep them from fluttering away.
2. •
   Any object used for this purpose.

   • John used his coffee mug as a paperweight.
3. •
   (slang) A useless piece of equipment.

   • On Windows, the card has a working driver. On Linux right now, it's a paperweight.