Pi-hole's 512-MB minimum is small, but Home Assistant, VPN, monitoring, databases or other services can consume far more memory and CPU on the same machine.
For users consolidating DNS with many ZimaOS applications.Pi-hole Hardware Requirements: RAM, CPU, Storage & DNS
Learn Pi-hole hardware requirements for RAM, storage, DNS, static IP, DHCP, blocklists and ZimaOS hardware.
Pi-hole hardware requirements at a glance
Pi-hole is one of the few lightweight home-server apps with a clear current upstream hardware floor. The official prerequisites require 512 MB RAM and at least 2 GB free space, with 4 GB free space recommended.
- RAM
- Current official Pi-hole prerequisites require 512 MB RAM. This is an upstream minimum, not a third-party estimate.
- Storage
- Current official prerequisites require at least 2 GB free space and recommend 4 GB. Long-term query logging, larger blocklists, backups and other services can justify more persistent storage.
- CPU
- Pi-hole does not publish a specific minimum CPU model or core count. Upstream calls the software very lightweight, and real-world Pi Zero-class systems demonstrate that DNS filtering itself needs little compute.
- Network
- Pi-hole must have a stable/static IP address or DHCP reservation so clients and routers can reliably use it as DNS. DNS uses TCP/UDP 53; optional DHCP uses additional ports.
- Architecture
- Current Pi-hole FTL binaries are pre-built for x86_64, armv6, armv7, armv8/aarch64 and riscv64. A ZimaOS x86_64 deployment therefore fits the supported upstream architecture path.
- Best Zima starting point
- ZimaBoard 2 832 is dramatically above Pi-hole's official 512-MB/2-GB floor and is the natural choice for Pi-hole plus other lightweight networking services. Larger Zima systems are justified by the rest of the home-server workload, not DNS filtering itself.
From official requirements to the right setup
Pi-hole sizing starts with its official 512-MB/2-GB floor, then checks DNS client count, query logging, blocklists, DHCP use, storage reliability and the other services sharing ZimaOS.
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Official requirements
Use current official prerequisites first: 512 MB RAM, at least 2 GB free space, 4 GB recommended and a stable/static IP address.
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Confirm your needs
Decide whether Pi-hole is DNS-only or also providing DHCP. DNS requires port 53 and reliable LAN reachability; optional DHCP changes the network/port design more than it changes CPU requirements.
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Leave room to grow
Plan persistent storage for configuration, gravity/blocklist data and query history. The official disk floor is small, but more logging and long retention can create more writes than the core DNS workload itself.
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Run it on ZimaOS
Install Pi-hole from ZimaOS, point a test client/router at it, then monitor query rate, memory, storage growth and DNS latency. Upgrade only if the wider server workloadโnot normal Pi-hole DNS filteringโcreates pressure.
Check every playback client
- 512 MB minimum RAM available to the Pi-hole environment
- At least 2 GB free space; 4 GB recommended by upstream
- Stable/static LAN IP or DHCP reservation
- TCP/UDP port 53 availability
- Optional Pi-hole DHCP service and required network access
- Blocklist size and query-log retention
- Reliable persistent storage and configuration backups
- Other ZimaOS networking/home-server apps sharing the host
Official minimum requirements
Pi-hole's current official prerequisites explicitly publish the baseline hardware numbers, so these should override older community guesses or Raspberry Pi model recommendations.
For current Pi-hole, publish 512 MB RAM and 2 GB free space minimum, with 4 GB free space recommended. Do not invent a CPU-core minimum. ZimaBoard 2 832 exceeds these official requirements by a wide margin.
| Requirement | Official minimum | What this supports |
|---|---|---|
| RAM minimum | 512 MB | Current official Pi-hole hardware prerequisite. |
| Free-space minimum | 2 GB | Current official minimum free-space requirement. |
| Free-space recommendation | 4 GB | Current official recommended free space. |
| CPU minimum | No specific official CPU model/core count published | Pi-hole explicitly describes itself as very lightweight and not requiring much processing power. |
| IP addressing | Stable/static IP required | A DHCP reservation is acceptable; clients need a reliable DNS-server address. |
| Supported FTL architectures | x86_64, armv6, armv7, armv8/aarch64, riscv64 | Other architectures require compiling FTL from source. |
When to upgrade your hardware
Pi-hole rarely needs a CPU/RAM upgrade by itself. Upgrades are more often triggered by storage reliability, logging or a larger multi-service home server.
The Pi-hole device is also becoming a multi-service server
Query logging and blocklist data create more persistent writes
You need a more resilient always-on DNS platform
The core DNS service is lightweight, but long retention and persistent logging can make storage reliability and free space more important than processor speed.
For users retaining longer DNS history or larger lists.DNS is infrastructure. Moving from an SD-card-style device to reliable SSD-backed Zima hardware can improve operational reliability even when raw performance was already adequate.
For households that depend on Pi-hole for every device's DNS.Plan hardware growth with confidence
Pi-hole scales best through reliable network placement, persistent storage and redundancy rather than raw CPU upgrades.
Use reliable persistent SSD-backed storage
Pi-hole needs little capacity, but an always-on DNS server benefits from dependable storage for configuration and query data.
Use ZimaBoard 2 eMMC only for light system data and add SSD if the host is becoming a broader always-on server.Keep the DNS path simple and wired where practical
A reliable LAN connection and stable IP matter more than high CPU performance. DNS traffic is small, but every household device depends on it.
Use wired Ethernet on ZimaBoard 2 for a fixed network-infrastructure role.Add a second DNS resolver for resilience
If DNS availability matters, a second independently hosted Pi-hole or resolver can be more valuable than a larger single box.
Treat redundancy as a separate node decision rather than simply buying a faster primary server.Upgrade for the other ZimaOS services
Move to more RAM or a multi-drive platform only when VPN, monitoring, storage, automation or other workloads require it.
Choose ZimaBoard 2 1664 or ZimaCube 2 from the complete home-server workload.Can it run on ZimaOS?
Pi-hole is currently listed in the ZimaOS App Store under Networking. Zima hardware substantially exceeds the current upstream minimums.
Install Pi-hole from the ZimaOS App Store
ZimaOS currently provides a Pi-hole App Store entry, avoiding a manual bare-metal installation path for a normal ZimaOS home server.
Open Pi-hole in the ZimaOS App StorePreserve DNS port access and a stable LAN address
Pi-hole must remain reachable on DNS port 53 and have a stable address. Verify that no other DNS service on the ZimaOS host conflicts with the Pi-hole deployment.
Read Pi-hole prerequisites and portsBack up Pi-hole configuration before network changes
Because household clients may depend on this DNS service, test router/DHCP changes carefully and preserve Pi-hole configuration before upgrades or migrations.
Read Pi-hole documentationChoose Zima hardware for your Pi-hole workload
Pi-hole's official 512-MB/2-GB floor is so low that every current Zima system in this guide is oversized for Pi-hole alone. ZimaBoard 2 832 is the default recommendation; larger hardware should be justified by other applications or storage.
Is Pi-hole mainly a network DNS service, or one service inside a much larger home-server/NAS stack?
Pi-hole plus lightweight networking/home apps
Start with ZimaBoard 2 832. Its Intel N150 and 8 GB RAM exceed Pi-hole's official 512-MB minimum by a very large margin. Choose 1664 only when other services independently need more RAM.
- Pi-hole and lightweight network servicesZimaBoard 2 832
- Larger multi-app network/home serverZimaBoard 2 1664
Broader NAS, backup or many-service platform
Choose ZimaCube 2 from storage and wider application requirements rather than Pi-hole. Creator Pack provides no Pi-hole-specific benefit.
- Storage-first home server with Pi-holeZimaCube 2 Standard
- Heavier all-in-one home-lab/NASZimaCube 2 Pro
- Only when unrelated GPU/AI workloads require itZimaCube 2 Creator Pack
This is a workload guide, not a DNS-queries-per-second benchmark. Pi-hole performance also depends on upstream DNS, blocklists, logging, LAN design and the other services sharing the host.
| Zima hardware | Best for | Example workload | Core configuration | Recommended boundary | Next step |
|---|---|---|---|---|---|
| ZimaBoard 2 832 | The default and best-value current Zima option for Pi-hole plus lightweight networking services. | Pi-hole DNS, optional DHCP, Tailscale/monitoring and several lightweight ZimaOS apps. |
|
Pi-hole itself is unlikely to stress this hardware; storage/network reliability and the other services are the real sizing factors. | Get Now |
| ZimaBoard 2 1664 | Pi-hole on a larger all-in-one network/home server with more containers. | Pi-hole plus monitoring, automation, databases, reverse proxy and more services. |
|
Do not claim Pi-hole needs 16 GB. | Get Now |
| ZimaCube 2 Standard | A storage-first NAS where Pi-hole is one lightweight networking service. | Pi-hole plus backups, multi-drive storage and moderate home-server apps. |
|
Choose it only if the broader NAS workload requires multi-drive capacity. | Get Now |
| ZimaCube 2 Pro | A heavier all-in-one NAS/homelab that also provides Pi-hole DNS. | Pi-hole plus many containers, databases, backups, monitoring and storage. |
|
Pro is unnecessary for Pi-hole alone. | Get Now |
| ZimaCube 2 Creator Pack | A Pi-hole-enabled server already required for separate GPU/AI workloads. | Pi-hole plus unrelated local AI/GPU/creator applications. |
|
Extreme overkill for DNS filtering. | Get Now |
What the Press Says
Highlights from trusted reviewers worldwide.
โZimaCube 2: Not just another NAS, tested with 25TB storage, local AI agents, 4K transcoding, and real homelab workflows.โRead full review
โThe ZimaBoard 2 is a compact x86 server board that can be turned into a mini NAS, home server, media box, or self-hosting hub.โRead full review
โZimaCube 2: A modern, high-performance NAS with plenty of room to growโbuilt for users who want more than basic storage.โRead full review
โCoverage focused on ZimaCube 2's open hardware foundation, no monthly fee, and self-hosting flexibility.โRead full review
Loved by the Community
Stories and reviews from people who build with Zima every day.
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Zima Blade Little yet Powerful
Maybe I am not digital natives but I live with PCs since 12 years old in 1984 when IBM PC clone come to my home. Many years have passed and many operating system I've tried. For me Zima blade and CasaOS was a quantum leap for home PC enthusiast and server lab machine to make me stay curious and relevant for this era.
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Very good!!
I use ZimaCube Pro as 5th Proxmox cluster node. It runs several VMs and containers, including a VM with GPU passthrough to run a self-hosted LLM. A specific LXC container runs a Samba server for NAS capabilities using four of six RAID 6 SATA HDDs with ZFS.
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It is very useful and makes a powerful mini server for many purposes, including university and college students in engineering and electronics. Thank you so much for making this server.
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Avaliaรงรฃo ZimaBoard 2
Construรญ um servidor de uso pessoal. O desempenho estรก muito bom e funciona perfeitamente onde quer que eu esteja. A surpresa รฉ nรฃo dependermos de grandes estruturas para termos nosso prรณprio servidor de dados. Como iniciante, estou gostando bastante do ZimaOS, pois ele รฉ simples e eficiente.
Frequently asked questions
The supplied Pi-hole sources are mostly consistent with current official requirements, but older community device recommendations should remain secondary to the current prerequisites page.
How much RAM does Pi-hole need?
Current official Pi-hole prerequisites require 512 MB RAM.
How much disk space does Pi-hole need?
Current official prerequisites require at least 2 GB free space and recommend 4 GB. Longer query-log retention and other applications may need more.
Does Pi-hole need a powerful CPU?
No specific CPU model or core-count minimum is published. Pi-hole calls itself very lightweight, and real-world Raspberry Pi Zero deployments show that normal DNS filtering is low-compute.
Can a Raspberry Pi Zero W still run Pi-hole?
Yes for at least some real workloads. The supplied April 2026 Ian Wootten article reports years of successful Pi-hole use on a 1-GHz, 512-MB Pi Zero W. That is a personal field report, not a current official hardware recommendation.
What does the 2018 Pi-hole forum thread prove?
It shows community members using/recommending Raspberry Pi Zero-class hardware for basic Pi-hole and emphasizing reliable power and quality microSD storage. It predates current official documentation and should not override today's 512-MB/2-GB requirements.
Is Privacy International's 512-MB/2-GB guidance still valid?
Its guide explicitly says it is based on official Pi-hole documentation and may become outdated. In this case, its 512-MB RAM and 2-GB free-space figures still match today's official minimums, while the current official page additionally recommends 4 GB free space.
Do I need a Raspberry Pi 4 or Pi 5 for Pi-hole?
No. The supplied Linus Tech Tips discussion considers even a Pi 3B sufficient, and current official requirements are far below Pi 4/5 resources. Newer hardware is mainly useful when you run additional services.
Can ZimaBoard 2 832 run Pi-hole?
Yes. Its Intel N150 and 8 GB RAM are far above Pi-hole's official 512-MB RAM requirement. It is better viewed as a platform for Pi-hole plus other home-server apps.
What sources and further reading informed this Pi-hole hardware guide?
The current official Pi-hole prerequisites page is authoritative and explicitly requires 512 MB RAM, at least 2 GB free space, recommends 4 GB, requires a stable/static IP and lists supported architectures. The supplied 2018 Pi-hole forum thread documents Raspberry Pi Zero-class community deployments and emphasizes power/storage reliability but is historical. Ian Wootten's April 2026 field report says his 1-GHz/512-MB Pi Zero W has run Pi-hole for years; this supports low-resource feasibility but not a recommendation. Privacy International repeats 512 MB and 2 GB from official documentation and warns readers to verify current docs. The supplied Linus Tech Tips discussion treats a Pi 3B as adequate, which is useful community context but unnecessary for defining the official minimum.
