Advertisements Wired or WiFi? Are the downloads new content that have not been DMCA? Are you using the same ISP? Have you run any speed tests besides usenet? Are you using SSL? If not, give it a try. How many connections are you using to download from your usenet server? You can try increasing the number a little to see if it makes a difference. You can try changing the Port number you use for usenet in Sabnzbd. Check which ports your usenet provider supports. Also, try alternative usenet servers that your provider has. Most usually have multiple servers to download from.