The minimum RAM requirements for a forum site depend on several factors, including the platform you use, expected traffic, and enabled features.
For a small forum with low traffic (a few hundred users per day), 1–2 GB of RAM is usually sufficient. This setup can handle basic operations like user registration, posting, and browsing without performance issues.
For a medium-sized forum with steady activity (thousands of users), it's recommended to have at least 4–8 GB of RAM. This ensures smoother performance, faster page loads, and better handling of concurrent users.
Large forums with high traffic, many plugins, or real-time features (like notifications or chats) may require 16 GB of RAM or more, along with optimized caching and database management.
In general, it’s better to start with a scalable setup and monitor performance. As your forum grows, you can upgrade RAM to maintain speed and stability.