4-camera Frigate NVR build
Frigate Hardware for 4 Cameras: CPU, AI and Storage
Four cameras are a small Frigate installation, but four is not automatically easy. A front door, driveway, street and backyard can all become active at the same time, and 4K recording can make storage much larger than the detector workload suggests. The best four-camera build is usually compact and efficient, with hardware decoding, a supported detector and enough storage for the desired retention rather than an oversized gaming PC.
Quick answer
What this Frigate workload needs
A modern Intel N100/N150 class mini PC with 8–16GB RAM can be a strong four-camera starting point when the iGPU handles video decoding and a supported detector handles object detection. Use 16GB if enrichments or other services share the host. Size the recording disk from real camera bitrate and retention, not from camera count alone.
Live Amazon hardware
Current products that fit this decision
These listings come from this sprint's dedicated Amazon catalogue. Barebones systems, accessories, camera kits, enclosures, replacement batteries, unrelated product classes and obvious multipacks are excluded by the normalizer.
Buying decision
Match the hardware to the bottleneck
For four cameras, spend first on correct decoding, detector support and reliable storage. Do not buy a high-end GPU just to compensate for unoptimized streams. A Hailo, OpenVINO or other supported detector path plus a recent iGPU is usually a better power/cost balance for a modest home installation.
Interactive decision tool
4-Camera Frigate Build Planner
Use the workload inputs to size a practical Frigate hardware tier before comparing live products. Results are planning guidance; verify current Frigate support, camera bitrates and the exact hardware configuration before deployment.
Compatibility checklist
Four checks before you purchase
Use hardware video decoding
A detector does not decode camera streams. Verify Intel, AMD or NVIDIA hardware acceleration separately.
Size by simultaneous activity
Busy overlapping cameras can require more detector throughput than a larger but quiet camera count.
Use supported detector hardware
Compare Hailo, OpenVINO, supported GPUs and other current Frigate detector paths before buying.
Calculate storage from bitrate
Retention depends on recording bitrate, duty cycle and days kept—not a fixed TB-per-camera rule.
Four cameras usually favor efficiency
At this scale the goal is not maximum compute density; it is a quiet, low-maintenance NVR that has enough headroom for bursts of activity. Recent low-power mini PCs are attractive because they can decode several streams in hardware while consuming little power at idle. The savings disappear if the host is forced into software decoding or a CPU detector. Configure acceleration correctly before judging whether the system is undersized.
Activity can still overlap
A four-camera home may include multiple views of the same driveway or entrance, causing several cameras to detect movement simultaneously. Frigate's planning guidance emphasizes simultaneous activity rather than simple camera count. If all four views cover quiet indoor spaces, detector load may be light. If they face a street, sidewalk or busy yard, choose more detector headroom than the camera number alone suggests.
Use a low-resolution detect stream
A common mistake is detecting on the full recording stream. Frigate recommends a purpose-sized detection stream and about 5fps for most users. A 720p or similar substream can dramatically reduce decode and processing cost while the high-quality main stream is retained for recordings. This optimization is often more valuable than moving from an entry mini PC to a larger CPU.
Hailo and OpenVINO are strong new-build options
For a new four-camera installation, Hailo-8L and Intel OpenVINO are attractive supported paths. A Coral can still work, especially where power or platform compatibility favors it, but Frigate no longer recommends Coral as the default for most new builds. The practical choice depends on what interfaces the mini PC exposes and whether enrichments also need GPU resources.
Eight gigabytes can work, sixteen is easier
Frigate's memory guidance allows a basic small system to operate with modest RAM, but 16GB is inexpensive insurance when the NVR also runs Home Assistant, semantic search or face recognition. Mini PCs often have limited expansion, so buying the larger memory configuration can prevent an unnecessary host replacement later. Memory headroom also reduces the chance that bursts of activity cause swapping and sluggish UI behavior.
Storage is often the largest cost
Four cameras recording continuously can consume several terabytes over a multi-week retention window, especially at higher bitrates. Event-focused recording can reduce that significantly. Use the storage calculator with the camera's actual configured bitrate if available. A surveillance HDD is usually the value choice for longer retention, while an SSD-only design can be appealing for a quiet, compact system with shorter retention.
A small PoE switch should still have spare capacity
An eight-port PoE+ switch is often a good fit for four cameras because it leaves room for expansion and avoids filling every port. Check the total PoE budget as well as the port count. Four fixed cameras may draw little power, but PTZ units, heaters or bright IR illuminators can change the requirement. Keep the uplink and Frigate host on the same reliable wired network segment when practical.
A modest UPS protects the complete chain
Four cameras do not require a huge UPS, but the battery should power the NVR host, recording storage, PoE switch and router if continuous security during brief outages matters. Estimate the combined wattage rather than sizing from server power alone. A 1000VA class UPS may be ample for many small systems, but actual runtime depends on load and the specific UPS design.
Home Assistant can share the machine
A four-camera Frigate instance and a modest Home Assistant installation can share a capable mini PC, especially with 16GB RAM. The design becomes less predictable when many additional add-ons, databases or media services are added. Monitor CPU, memory and disk latency after deployment. If one workload begins to affect the other, move the heavier service or upgrade before camera count grows.
Keep local recordings simple
Local storage reduces the number of systems that must be healthy for Frigate to save footage. A small external DAS or internal SSD/HDD can be simpler than a network share. If recordings must live on NAS, use wired networking and verify sustained write behavior. The reliability target for security footage should be higher than the tolerance for a media-library inconvenience.
Plan the path to eight cameras
Four cameras often become six or eight after the user discovers blind spots. Leave detector capacity, Ethernet ports, RAM and storage expansion room if that growth is likely. Buying a slightly more capable 16GB host and an eight-port switch now can cost less than replacing both pieces later. The page's live listings intentionally include products that can remain useful after a modest expansion.
Verify the exact Amazon configuration
Mini PCs and accelerators often share product pages across several variants. Confirm the CPU, RAM, SSD, accelerator interface and included accessories before checkout. A listing title may mention multiple options that are not all part of the selected variant. Cloudzat filters obvious mismatches but cannot replace the final configuration check on Amazon.
Questions people ask
Frigate Hardware for 4 Cameras questions
Is an N100 enough for four Frigate cameras?
Often yes when hardware decoding and a supported detector are configured. Busy cameras, enrichments or additional services may justify N305 or Core-class hardware.
How much RAM do I need for four Frigate cameras?
8GB can work for a modest system. 16GB gives better headroom for enrichments, Home Assistant and future cameras.
Do four cameras need a Coral?
No. Frigate supports Hailo, OpenVINO, supported GPUs and other detector options. Coral is no longer the default recommendation for most new builds.
How large a hard drive for four cameras?
It depends on bitrate, recording mode and retention. Use the storage calculator with real camera settings rather than a fixed TB-per-camera rule.
Can I use SSD storage for four cameras?
Yes. SSDs can work well for smaller retention windows and quiet systems. Compare endurance, price and required capacity.
What detection FPS should I use?
About 5fps is Frigate's usual recommendation. Higher values may help fast motion but increase processing demand.
Do I need an 8-port PoE switch for four cameras?
Not strictly, but an 8-port switch leaves expansion room and can be better value than filling a smaller switch immediately.
Can Home Assistant and Frigate share an N100?
They can for lighter workloads. Use enough RAM and monitor CPU, memory and storage pressure as add-ons grow.
Should recordings be local?
Local storage is the simplest reliability baseline. NAS recording is supported but adds network and storage dependencies.
Do four cameras need a discrete GPU?
Usually not. A modern iGPU plus a suitable detector can be more efficient for this scale.
Official references and methodology
Verify current Frigate support before deployment
Cloudzat treats 4 cameras as a workload tier, not a guarantee of performance. Recommendations combine Frigate's official guidance on simultaneous activity, hardware decoding, detector support, RAM and storage with a dedicated Amazon catalogue. Verify exact camera bitrates, supported accelerators and seller configurations before deployment.
- Frigate - Planning a New Installation
- Frigate - Recommended Hardware
- Frigate - Video Decoding
- Frigate - Object Detectors
- Frigate - Camera Setup
- Frigate - Enrichment Hardware Acceleration
- Frigate - Installation
As an Amazon Associate, Cloudzat may earn from qualifying purchases. Prices, seller terms, exact configurations, camera firmware and Frigate support can change.