Vidéotron ltée will implement a download cap of 100 GB per month for its Extreme High-Speed Internet service to ensure users don't overload the network, according to a statement from the Montreal-based carrier. The firm has sent letters to customers explaining that they will have to pay $1.50 per gigabyte over the limit on the 10 Mbps service. "Videotron's decision to limit the downloading capacity carries a minimal impact on its clients since the very vast majority does not use over 100 GB," the company says, noting that 100 GB represents more than 70 movies and 20,000 songs. The cap comes into effect October 1.