HBO GO requires a minimum 512 Kbps connection. Make sure that your connection has a minimum 512 Kbps. Downloading and browsing in the background may also affect video streaming. To optimize your viewing experience, verify that the browser loading the HBO GO site is the only active App. Additionally, the slowest systems may have problems with optimum video playback. Verify that the minimum system specifications are true and that your computer is fast enough for HBO GO.