# Modded Minecraft Server Requirements: What You Actually Need for Different Modpacks One of the most common questions before starting a modded server is also one of the hardest to get a straight answer to: "what do I actually need?" Modpack pages usually list a bare-minimum spec that assumes solo play and a short session, hosting providers list plans by RAM alone, and neither tells you what happens once real people are building automated factories together for months. Here's a more honest breakdown. ## Why Modpack "Minimum Requirements" Are Often Misleading Most modpacks list a minimum RAM requirement on their download page — something like "4GB minimum, 6GB recommended." That number is almost always calibrated for a single player briefly testing the pack, not a multiplayer server running continuously with several people building, automating, and exploring at once. The gap between "technically runs" and "runs well for a group over time" is bigger than most of these pages let on. A pack that lists 6GB as recommended might genuinely need 10GB+ once four players have real bases and factories running. ## Requirements by Modpack Category Different types of modpacks stress different resources, so a single universal number doesn't really work. Here's a more realistic breakdown by category: **Exploration and adventure packs** (e.g., Vault Hunters, lighter RPG-style packs) These tend to be easier on server resources since they're less focused on constant automation. A small group can often run comfortably on 4-6GB RAM, with CPU demands driven mostly by chunk generation as players explore. **Tech and automation packs** (e.g., GregTech: New Horizons, Mekanism-heavy packs, Industrial Foregoing-based packs) These are the most resource-intensive category by far. Automated machines run their logic every tick regardless of player activity, so RAM needs climb fast — often 10GB+ for a group of four or more — and CPU clock speed becomes the dominant bottleneck rather than RAM. **Kitchen-sink packs** (e.g., All the Mods, Enigmatica) These combine automation, magic, exploration, and dozens of miscellaneous mods into one pack, often exceeding 300 mods total. Requirements scale with how players actually use the pack — a group focused on tech content needs different resources than one focused on magic or building, even within the same modpack. **Magic-focused packs** (e.g., packs built around Ars Nouveau, Botania) Generally lighter on server resources than automation-heavy packs, since magic systems tend to be less tick-intensive than large machine networks, though this varies significantly by specific mod combination. ## The Two Specs That Matter More Than People Think **CPU clock speed, not core count.** This comes up constantly because it's genuinely counterintuitive: Minecraft's server tick loop remains largely single-threaded, so a fast single core outperforms a slower processor with many more cores. A hosting plan advertising "12 vCPUs" can actually underperform a plan with fewer but faster cores for this specific workload. **Storage speed for chunk activity.** Modded worldgen — extra ores, custom biomes, additional dimensions — makes chunk read/write operations more expensive than vanilla. SSD storage isn't optional for anything beyond a very small, lightly modded server; it's close to a baseline requirement. ## A Rough Sizing Table | Modpack type | Player count | RAM guidance | Priority spec | |---|---|---|---| | Light exploration/adventure | 2-4 | 4-6GB | Balanced CPU/RAM | | Moderate kitchen-sink | 4-6 | 6-10GB | CPU clock speed | | Heavy tech/automation | 6+ | 10GB+ | CPU clock speed, SSD storage | | Magic-focused | 2-5 | 4-8GB | Balanced CPU/RAM | These numbers are starting points based on typical usage patterns, not hard rules — a small group that goes all-in on automation in a "light" pack will outgrow these numbers just as fast as a larger group in a heavier one. ## Requirements Change Over Time, Not Just Upfront This is the part most requirement guides skip entirely: a server's needs on day one are rarely its needs by week eight. A modest base grows into a sprawling factory. A quiet exploration server accumulates more loaded chunks as players spread out. Planning for a hosting setup that can scale RAM or CPU without a full server rebuild saves a lot of pain compared to sizing once and hoping it holds. ## Where to Check Specifics for Your Exact Setup Generic sizing tables only go so far, since real requirements depend heavily on the specific mod combination, player habits, and how far into the pack a group has progressed. For a deeper look at matching hosting specs to specific popular modpacks — along with actual configuration steps — there's a full breakdown in this [modded server requirements guide](https://techprim.com/guide-to-modded-minecraft-server-hosting/) that goes further into the specifics than a general overview can. ## The Bottom Line There's no single answer to "what do I need for a modded server," but there is a reliable method: figure out which category your modpack falls into, size for where your group is headed rather than where it starts, and prioritize CPU clock speed and SSD storage over chasing the biggest RAM number on a pricing page. Get those three things right, and most of the guesswork disappears.