This is bugging me because it's a random detail I remember that's stuck in my head. The main character is entering the lair of one or more vampires and happens upon a box of what seems to be sand and bits of metal, which they eventually realize used to be a piece of electronics, but something about the entropic nature of vampires had caused the silicon in the chips to revert to sand.
I'm pretty sure I read it somewhere between 2000 and 2015 as a physical book, in English. Vampires were inherently antithetical to life, and spread if not exterminated.