Best NAS for 40 TB for United Kingdom
A long-term NAS with 40 TB usable capacity, parity redundancy and room to grow. Prices and availability for United Kingdom.
The request
- File storage · 2 users
- Backup
- Photo storage
- 10GbE network
- 40 TB usable · 1 parity drive
Overview · Smart build≈ €2,025
Requirements vs this build
need · used| CPU cores | 8 / 18 | 44% | OK |
|---|---|---|---|
| RAM | 32 / 32 GB | 100% | Full |
| Storage | 41 / 49 TB | 84% | Tight |
| GPU | Not needed |
Power
- Usage
- 24/7
- Idle
- 37 W
- Typical
- 46 W
- Peak
- 200 W
- Energy / year
- ≈ €137
- Over 3 years
- ≈ €412
Score
Overall88
Performance100
Efficiency71
Value73
Why this variant
Choose it if
Balances your priorities with a 2025€ price tag and a 37W idle draw.
It sacrifices
- Not specialized: it does not push any single dimension (value, silence, expansion) to the extreme.
How the parts were chosen
- Intel Core Ultra 5 250KF Plus: 18 cores / 18 threads covers the 8 cores needed with headroom. (2.3× needed — chosen for future expansion)
- Motherboard Intel Z890 (LGA 1851): matches the CPU socket and case size.
- RAM: 32GB DDR5 — meets the 32GB the workload requires.
Why not the others
- Smart build — best all-round beats "Value build — most for your money" on efficiency +5, silence +23 — that is why it is recommended for your priorities.
Before you buy
Nothing critical to fix before you buy.
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Idle
37W
Typical
46W
Peak
200W
Energy / year
≈ €137
Performance100
Value73
Efficiency71
Expandability89
Silence73
Longevity96
Reliability70
Overall88
Future-proof score
Strong future-proofing81/100
Strong future-proofing (81/100) — this build should stay relevant for years without major surgery.
Upgrade path75
DIY build — the CPU, motherboard and PSU can each be upgraded independently without replacing the whole system.
Expansion100
Expansion headroom: 3 PCIe slot(s), 3 M.2, 1 SATA, 3 drive bay(s), 2 RAM slot(s) free.
Storage growth70
Storage is 84% utilized with 3 free drive bay(s) and 1 free SATA port(s).
Memory growth75
2 RAM slot(s) free; memory is 100% utilized.
Networking95
Networking is 10000 Mbps, and a free PCIe slot can add a faster NIC later.
Replacement ease80
MATX form factor with standard, socketed components — most parts are easy to replace.
Workload change70
No GPU, but there is room (3 PCIe slot(s), PSU headroom 5x) to add one for AI/transcoding.
Homelab Risk Score
Low risk10/100
Low risk (10/100) — sensible redundancy and headroom; no single point of failure is exposed.
low
Single point of failure
Storage has redundancy (parity1) — a single drive failure does not take the array down.Fix: Continue a 3-2-1 backup strategy; redundancy is not a backup.
low
Storage risk
7 NAS-rated hard drive(s) — rated for 24/7 operation.Fix: Keep drives cool and monitor SMART health.
low
Data loss risk
Redundancy protects against drive failure, though it is not a substitute for backups.Fix: Follow a 3-2-1 backup rule: at least one copy off the box.
low
Power risk
PSU is 1000W, peak load 200W (20%).Fix: PSU sizing leaves healthy headroom for spikes and future parts.
low
Network risk
Single 10000 Mbps NIC — a switch/port failure takes the box fully offline, and multi-user media can saturate 10000 Mbps.Fix: Consider a second NIC or a managed switch; for heavy media, plan for 2.5/10G before the build.
low
Expansion risk
3 PCIe, 3 M.2, 1 SATA, 3 bays free.Fix: Healthy room for future drives, NICs and accelerators.
low
Upgrade risk
2026 platform — current generation with a forward-looking socket/feature set.Fix: Buy for the workload, not the socket — upgrade paths are a bonus, not a guarantee.
Final build audit
Audit passed (0 critical, 0 warning) — mostly optional and future considerations remain.
2 Optional3 Future
Optional
Add a UPS
An always-on server holding data should survive power blips.Action: Add a line-interactive UPS sized for the build's peak draw (≥ 10 min at typical load for a clean shutdown).power
Optional
Keep a backup off-box
Redundancy inside the box does not survive fire, theft or a whole-array fault.Action: Mirror the important data to an external drive, a second box, or cloud.storage
Future
RAM expansion available
2 RAM slot(s) free for a later upgrade.Action: Leave them free until the workload actually grows.memory
Future
Drive bays remain
3 drive bay(s) free for future capacity.Action: Expand capacity in pairs (mirror/parity) when needed.storage
Future
PCIe slot available
3 free PCIe slot(s) for a NIC, HBA or GPU later.Action: Use it for a 10G NIC, extra HBA, or an accelerator when the need appears.expansion
What becomes the limit
RAM is tight is the most likely thing to date this build within 1-2y.
1-2y
RAM is tight
Why: Memory is 100% utilized — a growing workload will hit the ceiling quickly.What to do: Add the remaining RAM before prices change, while slots are free.
1-2y
Storage nearly full
Why: 84% of raw capacity is already in use — media libraries and backups grow fast.What to do: Expanding is easy: add a drive to the free bays/ports.
What limits you first
RAM is the closest to its limit (100% of capacity in use) — it will likely force the next upgrade.
- Add Microconnect MC-PCIEX4-X520-DA1 network card Internal Fiber 10000 Mbit/s
- Upgrade cpu to Intel Core Ultra 7 270K Plus
- Upgrade storage to Seagate IronWolf NAS 8TB HDD 3.5" 7200RPM SATA
- Add Seagate Constellation ES.3 4TB 3.5" HDD 7200RPM SAS 6.0 Gb/s
Mission
File storage · primary · 2 usersBackup · primary · 1 usersPhoto storage · secondary · 1 users10GbE network · secondary · 1 users
Constraints- Budget
- —
- Storage
- 40 TB (parity 1)
- Energy priority
- 4/10
- Noise priority
- 3/10
- Expansion priority
- 10/10
Recommended architecture
diy · tower build on LGA 1851 + Intel Z890- Compute
- Intel Core Ultra 5 250KF Plus
- Memory
- Acer HT200 32GB (2 x 16 GB) DDR5 6000 CL30 Black
- Storage
- Inland Performance Plus 1TB SSD M.2 PCIe 4.0 NVMe, Seagate IronWolf NAS 8TB HDD 3.5" 7200RPM SATA
- Networking
- 110G onboard
- Cooling
- Thermalright Peerless Assassin 120 SE CPU Air Cooler
- Power
- be quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black
- Expansion
- 3× PCIe, 3× M.2, 1× SATA, 3 bay, 2× RAM
Keep going
