CCTVPLANNER.IO · NVR · HIKVISION
Hikvision DS-7708NI-K4
8-ch Pro K 4K NVR, 4 HDD up to 10 TB, 16/4 alarm (no PoE)
SPECIFICATIONS · DS-7708NI-K4
Full specifications
Specifications sourced from official manufacturer datasheet (link in hero).
About the Hikvision DS-7708NI-K4
The Hikvision DS-7708NI-K4 is a mid-channel recorder positioned for the most common SMB site — typical retail chains, mid-sized offices, warehouses and clinics that sit between roughly eight and sixteen cameras. Storage capacity sits in the comfort zone for month-long retention at typical channel resolutions, with room to drop archived footage onto cold storage as it ages out. The 2U chassis gives space for additional HDD bays, a fuller fan complement, and a sturdier power supply than a 1U slim case — the cost is one extra rack unit and more weight. No PoE ports are built into the recorder, so cameras connect through a separate PoE switch. That is the preferred architecture on professional installs because a dedicated managed switch gives finer VLAN control, larger PoE budgets, and easier replacement than an integrated switch tied to the NVR chassis.
Best use cases for this recorder
SMB site — office, school, clinic, hotel
The 8-channel/4-bay combination sits in the most-shipped slot for SMB CCTV: enough channels for a mid-sized site, enough storage for 30-60 day retention at typical commercial-camera bitrates.
4K/8MP camera deployments
Native support for 12 MP per-channel recording matches it to current-generation 4K cameras — useful when the install plan calls for fewer-but-higher-resolution cameras (typical of perimeter, parking, and identification-focused layouts).
Strengths
- •Smart H.265+ codec halves storage cost over H.265 at equivalent perceived quality
- •ONVIF compliance lets the unit record from third-party cameras, not just the same-brand catalog
- •16 in / 4 out alarm I/O supports integration with intrusion panels and external sensors
Considerations
- •No built-in PoE — budget for a separate managed PoE switch with appropriate per-port wattage for the planned cameras
- •No RAID support — single-disk failure means losing all footage on that disk; plan retention policy accordingly
Storage planning
Running all 8 channels at the industry-typical 4 Mbps/channel H.265 CBR (15 fps, 4 MP scene complexity), the DS-7708NI-K4 produces roughly 338 GB of footage per day — about 2363 GB/week, 10125 GB/month, and 30375 GB across a 90-day retention window. Fully populated with 4× 10 TB drives the unit holds 40 TB raw — enough for roughly 4.0× the one-month archive at full bitrate before RAID overhead. These figures are deterministic — derived from your bitrate assumption, the channel count, and the calendar — not estimated from a marketing data sheet.
Estimates assume 4 Mbps per channel H.265 CBR continuous recording. Motion-only recording typically reduces storage by 40-70%.
Bandwidth headroom
Input (ingest)
Avg 10.0 Mbps per channel — enough for 4K H.265 at 4 Mbps/channel.
Output (playback)
Sets the ceiling for simultaneous remote playback streams to mobile and web clients.
Installation tips for the DS-7708NI-K4
Install in a standard 19-inch rack cabinet on supported rack rails; allow at least 1U of clearance above and below the 2U for airflow and HDD-bay servicing.
Plan storage at roughly 338 GB/day (≈10125 GB/month) for continuous H.265 recording at 4 Mbps/channel — match HDD capacity to the longest retention window the privacy policy or insurance contract demands.
Pair with a managed PoE switch sized for the camera plan — choose 802.3at (≤30 W/port) for typical IR-equipped bullets, 802.3bt (≤60-90 W/port) when PTZ or heated housings are in scope.
Power & rack
Power draw sits at roughly 50 W idle and around 50 W under full load (4-bay HDD activity). That dissipates approximately 171 BTU/hour of heat into the rack — size the comms-cabinet ventilation accordingly. Allow 2U of cabinet space for the chassis plus 1U of unobstructed airflow above and below; pair with a UPS sized for at least 15-minute hold-up so the recorder shuts down cleanly on mains failure.
Installer time & cost (rough estimate)
A typical EU integrator quotes 6-8 h of labour to commission the Hikvision DS-7708NI-K4 (approximately €270-€360 excluding hardware), broken down as physical install, HDD population, 8-channel discovery and IP/credential configuration, schedule + retention setup, motion / event rules per camera, mobile-app pairing, and a brief operator handover. Allow extra time for sites with non-standard network topology (multi-VLAN, multi-site bridges) or for migrations from a legacy DVR where camera streams must be re-addressed.
Indicative EU 2024-2025 pricing — actual quotes vary by region, network topology and migration scope. Excludes hardware, HDDs, transport, permits, and VAT.
Frequently asked questions
How many cameras can the Hikvision DS-7708NI-K4 record?
Up to 8 IP camera channels per chassis. Total ingest bandwidth is 80 Mbps, which sets the practical ceiling — running every channel at 4K (typically 8 Mbps each) requires 64 Mbps, so verify whether your camera plan fits inside the bandwidth budget.
Does the Hikvision DS-7708NI-K4 support third-party (ONVIF) cameras?
Yes — ONVIF Profile S/T support means the unit records from third-party cameras as well as the same-brand catalog. Most cameras supporting ONVIF 16.12 or newer plug-and-play; older firmware may require manual stream URL configuration in the NVR web UI.
How much storage does the Hikvision DS-7708NI-K4 need for 30-day recording?
At the industry-typical 4 Mbps per channel H.265 CBR (15 fps, 4 MP scene), all 8 channels recording continuously for 30 days produces approximately 10125 GB (9.9 TB) of footage. Motion-only or event-triggered recording typically cuts that by 40-70 % depending on scene activity. Plan HDD capacity for the longest retention window your privacy policy or insurance contract demands.
What HDDs are recommended for the Hikvision DS-7708NI-K4?
Use surveillance-rated HDDs — WD Purple, Seagate SkyHawk, Toshiba S300, or equivalent. Desktop / consumer drives (WD Blue, Seagate Barracuda) are not validated for 24/7 write workloads and typically fail within 12-18 months in CCTV use. Max 10 TB per bay across 4 bays = up to 40 TB raw capacity; populate matched pairs/sets if planning RAID.
Does the Hikvision DS-7708NI-K4 need its own PoE switch?
Yes — the recorder has no built-in PoE, so cameras connect through a separate managed PoE switch. Size the switch's PoE budget for the planned cameras: 802.3at (≤30 W/port) handles typical IR-equipped bullets and domes; 802.3bt (≤60-90 W/port) is needed for PTZ and heated housings.
What power and cooling does the Hikvision DS-7708NI-K4 need?
Plan for 50 W idle and ~50 W under full load, dissipating roughly 171 BTU/hour into the rack or cupboard. Size the UPS for at least 15-minute hold-up so the unit can flush write buffers and shut down cleanly on mains failure — abrupt power loss is the leading cause of NVR file-system corruption in commercial installs.
Is the Hikvision DS-7708NI-K4 suitable for evidentiary recording?
Depends on the retention and chain-of-custody policy. The 4-bay chassis supports basic mirroring on the install side, but lacks declared RAID 5/6 parity — verify with the vendor whether RAID is supported in newer firmware On the export side, ensure footage is hashed and timestamped before transfer to investigators.
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Helpful Tools & Resources
Storage Calculator
Match HDD capacity to your retention policy
Bandwidth Calculator
Verify your network can carry the ingest load
Camera Quantity Calculator
Match channel count to your site
UPS Sizing Calculator
Hold-up time for clean NVR shutdown on mains failure
System Budget Estimator
Hardware + install + commissioning cost
CCTV Storage Planning Guide
Bitrate, retention, RAID — the full math
Plan your CCTV layout with Hikvision DS-7708NI-K4
Use our free CCTV planner to lay out cameras feeding this recorder, match HDD capacity to retention windows, and generate a professional PDF report — no signup required.
Free until you outgrow it · No card · No install