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DayZ server requirements

What a DayZ server needs in CPU, memory, disk and bandwidth, by player count. Change the numbers for your own server; the sources are listed below.

Mods (Steam Workshop)
Assumptions

What it needs

CPU
10 coresSingle-thread heavy: clock speed matters more than core count.
Memory
11 GB
NVMe storage
33 GB
Traffic per month
680 GB
Busiest upload
6 Mbit/s

On Clouduxe

Room to grow

VDS UltraCore

16 dedicated cores, 64 GB DDR5, 1.5 TB NVMe, 30 TB traffic

₹39,761$418.99/mo

  • 4 more dedicated cores, 16 GB more memory, 500 GB more NVMe.
  • Headroom for busy evenings, more players, and the mods and updates you add later.
Deploy UltraCoreAbout UltraCore

By player count. Without mods (steam workshop); each step up in the calculator adds memory, disk and sometimes a core.

PlayersCPUMemoryNVMeTraffic a monthFits your loadRoom to grow
103 cores8.5 GB33 GB113 GBVPS ProVDS FusionCore
204 cores9 GB33 GB227 GBVPS ProVDS FusionCore
407 cores10 GB33 GB454 GBVDS PrimeCoreVDS TitanCore
6010 cores11 GB33 GB680 GBVDS TitanCoreVDS UltraCore
8013 cores12 GB33 GB907 GBVDS UltraCoreBare metal
10016 cores13 GB33 GB1.1 TBVDS UltraCoreBare metal

Traffic assumes 35% of the player cap online on average across the month; change it under Assumptions in the calculator.

Where the numbers come from. Published figures first, then how the calculator turns them into a model.

Published requirements

How the model is built

Memory
8 GB plus 50 MB per player. Base 8GB matches both Bohemia Interactive's own minimum ('at least 6 to 8 GB of RAM', per IONOS) and hosting guides that put a 10-20 player vanilla server at 8GB. Per-player growth is kept small (50MB) because every source agrees mods, not player count, are the dominant driver of RAM use; the mods multiplier (1.7x some, 4.0x heavy) is what pushes the model from ~9-11GB vanilla up to the 16-32GB and 32-64GB tiers hosting guides cite for modded/AI-mission servers.
CPU
2 cores, one more for every 7 players. Bohemia's own minimum is a dual-core CPU. Every source stresses single-core/single-thread performance over core count (the server simulates world state, infected AI and physics on limited threads). playersPerExtraCore=7 climbs from the 2-core floor to about 4 cores by 15-20 players and 8-9 cores by 50-60, matching the 4-core minimum and 6-8+/8+ core recommendations from hosting guides at those tiers.
Disk
3 GB for the server plus 30 GB for saves and backups, on SSD or NVMe. installGB rounds up Bohemia's own quoted server storage figure ('storage space: 2.5 gigabytes' for the base install, per IONOS). growthGB reflects real-world usage once persistence data, logs, and mission files are running, landing near the 30GB SSD figure hosting guides give for a small vanilla server; heavily modded servers with custom maps/textures can need 250-500GB+, noted separately. SSD is called essential by every source, both for install/log speed and to avoid desync during loot respawns.
Bandwidth
100 kbit/s of upload per player. IONOS explicitly recommends planning for 80-120 Kbit/s per player for a DayZ server (noting this is higher than Valve's general 53.4 Kbit/s per-player guideline for other dedicated server games); 100 kbps is the midpoint.
Mods (Steam Workshop)
Memory times 1.7 for some and 4 for heavy; a heavy load also adds a core.

Bohemia Interactive's own published minimum (dual-core CPU, 6-8GB RAM, ~2.5GB disk) is very low by modern standards and is not tied to a specific player count; it predates most community servers' actual usage. Real-world sizing above the minimum comes from hosting-provider guides, not a single official developer table. Mod load (Steam Workshop) causes the widest swings in actual resource use of any factor covered.

Before you set it up. The ports it listens on and what the guides say drives its load.

Ports

PortProtocolUsed for
2302UDPgame
2303UDPadditional/query (default range 2302-2306)

Game server hosting: every game we size, the protection each one gets, and the plan for it.

DDoS protection is on every Clouduxe plan. How Prism handles game traffic.

What drives the load

  • Mods are the single biggest driver of RAM and CPU load, not raw player count; a heavily modded server can need 4x or more the resources of vanilla at the same population.
  • DayZ is single-core bound: infected AI, physics and world simulation run on limited threads, so a fast CPU core matters more than extra cores.
  • SSD or NVMe storage is treated as essential; HDDs cause slow startup, loot-respawn lag and desync.
  • Custom maps (Deer Isle, Namalsk, etc.) and large mod packs can multiply disk use well beyond a vanilla install.

DayZ server questions

Talk to us
How much RAM does a DayZ server need?

About 8.5 GB for 10 players and 13 GB for 100, before mods (steam workshop). Base 8GB matches both Bohemia Interactive's own minimum ('at least 6 to 8 GB of RAM', per IONOS) and hosting guides that put a 10-20 player vanilla server at 8GB. Per-player growth is kept small (50MB) because every source agrees mods, not player count, are the dominant driver of RAM use; the mods multiplier (1.7x some, 4.0x heavy) is what pushes the model from ~9-11GB vanilla up to the 16-32GB and 32-64GB tiers hosting guides cite for modded/AI-mission servers.

How many CPU cores does a DayZ server need?

3 for 10 players, 16 for 100. The server is single-thread heavy, so the clock speed of one core matters more than how many cores it has. Bohemia's own minimum is a dual-core CPU. Every source stresses single-core/single-thread performance over core count (the server simulates world state, infected AI and physics on limited threads). playersPerExtraCore=7 climbs from the 2-core floor to about 4 cores by 15-20 players and 8-9 cores by 50-60, matching the 4-core minimum and 6-8+/8+ core recommendations from hosting guides at those tiers.

How much bandwidth does a DayZ server use?

About 100 kbit/s of upload per connected player, so 6 Mbit/s with 60 players online and about 680 GB a month if 35% of that cap is online on average. IONOS explicitly recommends planning for 80-120 Kbit/s per player for a DayZ server (noting this is higher than Valve's general 53.4 Kbit/s per-player guideline for other dedicated server games); 100 kbps is the midpoint.

Which Clouduxe plan should I pick for DayZ?

For 60 players, VDS TitanCore fits the load and VDS UltraCore leaves room to grow. Every plan includes DDoS protection: 17 Tbps of upstream mitigation plus Clouduxe Prism on the server.

Other games. The same calculator, sized from each game's own documentation.

All calculators

Host DayZ on VDS TitanCore.

Sized for 60 players, with DDoS protection included. Or talk to us about a bigger server.

See VDS TitanCoreSize another server