Nexus throttles based on server load. If you download on a Saturday evening (US time), you will get 800 KB/s. If you download at (Late night US / Early morning EU), the server load drops, and the throttle "softens."
If you are getting speeds significantly lower than 1.5MB/s (e.g., 20–100KB/s), the issue is likely your connection or ISP throttling. Nexus Download Speed Bypass
Exclusively for Premium Members . This removes all artificial limits, though physical distance and ISP routing still apply. Top Methods for Optimizing Nexus Download Speeds Nexus throttles based on server load