Best NAS for 40 TB
A long-term NAS with 40 TB usable capacity, parity redundancy and room to grow.
The request
- File storage · 2 users
- Backup
- Photo storage
- 10GbE network
- Budget €1,400
- 40 TB usable · 1 parity drive
Overview · Value build≈ €2,339
Requirements vs this build
need · used| CPU threads | 8 | 80% | Tight |
|---|---|---|---|
| RAM | 44 GB | 92% | Tight |
| Storage | 64 TB | 100% | Full |
| GPU | Not needed |
Power
- Usage
- 24/7
- Idle
- 39 W
- Typical
- 44 W
- Peak
- 129 W
- Energy / year
- ≈ €97
- Over 3 years
- ≈ €290
Score
Overall41
Performance88
Efficiency70
Value0
Why this variant
Choose it if
The lowest total price (2339€) that still covers this workload properly — best price/quality ratio.
It sacrifices
- No ECC memory — fine for home use, less ideal for bit-rot-sensitive archives.
- Expansion headroom is trimmed: parts are chosen for price per capability.
How the parts were chosen
- Intel Core i5 14400F: 10 cores / 16 threads covers the 8 cores needed with headroom.
- Motherboard Intel Z690 (LGA 1700): matches the CPU socket and case size.
- RAM: 48GB DDR5,DDR4 — meets the 44GB the workload requires.
Why not the others
- All variants are close; the winner matches your priorities best.
Before you buy
3 criticalCritical
Check the balance
Total (2339€) exceeds your budget (1400€) by 939€ (67%). Ranking already prefers in-budget variants — this one is shown for comparison; check the value variant or raise the budget.
Critical
Check the balance
This build may struggle with the stated workload.
Critical
RAM is nearly exhausted
The workload needs 92% of available RAM — swapping will hurt.
cpuIntel Core i5 14400F10C/16T · 4.7 GHz · LGA 1700 · 65 W€148
motherboardMSI Z690 MEG UNIFY-X DDR5 ATXIntel Z690 · ATX · 11× M.2≈ €170
ramCorsair Vengeance Black DDR5-6400 CL36 48GB (2x24GB)48 GB DDR5 · 6400 MT/s€662
caseCooler Master Force 500 ATX Mid Tower BlackATX/MATX/ITX · 7× 3.5″€52
coolingARCTIC Alpine 17 CO Air 77mm Blackair low-profile · 77 mm€9
psube quiet! TFX Power 2 Black TFX 300W Non-Modular 80+ Gold Certified300 W · gold€16
storageSanDisk NAS 800 NVMe SSDNVME · 92 TB · NAS-rated€728
storage× 6WD Red Plus Internal NAS HDD 3.5" - 8TB3.5 HDD · 8 TB · NAS-rated€470
networkTRENDnet TEG-10GECTX 10 Gigabit PCIe Network Adapter 10 Gb/s Ethernet PCIe x410GbE · 1× ports€84
Idle
39W
Typical
44W
Peak
129W
Energy / year
≈ €97
Performance88
Value0
Efficiency70
Expandability100
Silence50
Longevity99
Reliability70
Overall41
Future-proof score
Strong future-proofing71/100
Strong future-proofing (71/100) — 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: 1 PCIe slot(s), 10 M.2, 0 SATA, 1 drive bay(s), 0 RAM slot(s) free.
Storage growth50
Storage is 100% utilized with 1 free drive bay(s) and 0 free SATA port(s).
Memory growth20
0 RAM slot(s) free; memory is 92% utilized.
Networking95
Networking is 10000 Mbps, and a free PCIe slot can add a faster NIC later.
Replacement ease90
ATX form factor with standard, socketed components — most parts are easy to replace.
Workload change70
No GPU, but there is room (1 PCIe slot(s), PSU headroom 2.3x) 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
6 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 300W, peak load 129W (43%).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
1 PCIe, 10 M.2, 0 SATA, 1 bays free.Fix: Healthy room for future drives, NICs and accelerators.
low
Upgrade risk
2024 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 found 3 critical and 0 warning item(s) worth fixing before you buy.
3 Critical2 Optional2 Future
Critical
Check the balance
Total (2339€) exceeds your budget (1400€) by 939€ (67%). Ranking already prefers in-budget variants — this one is shown for comparison; check the value variant or raise the budget.Action: Reconsider the config for the stated workload or budget before buying.balance
Critical
Check the balance
This build may struggle with the stated workload.Action: Reconsider the config for the stated workload or budget before buying.balance
Critical
RAM is nearly exhausted
The workload needs 92% of available RAM — swapping will hurt.Action: Add more RAM now, while slots are still free.memory
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
Drive bays remain
1 drive bay(s) free for future capacity.Action: Expand capacity in pairs (mirror/parity) when needed.storage
Future
PCIe slot available
1 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 maxed out is the most likely thing to date this build within 1-2y.
1-2y
RAM is maxed out
Why: All RAM slots are used and the workload already sits at 92% — the next memory need means replacing kits or a new build.What to do: Buy a single larger kit now, or plan the RAM for the full lifecycle.
1-2y
Storage nearly full
Why: 100% 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.
1-2y
CPU is the next bottleneck
Why: The CPU runs at 80% of capacity — new services or more users will hit the wall first.What to do: Consider a stronger CPU within the same socket generation while it is still cheap.
What limits you first
Storage is the closest to its limit (100% of capacity in use) — it will likely force the next upgrade.
- Upgrade network to Microconnect MC-PCIE5.0X16-CONNECTX-7 network card Internal Fiber 400000 Mbit/s
- Add maxsun Graphics Cards AMD Radeon RX 550 Graphics Card 4GB Graphics Card ITX Computer PC Gaming GPU
- Upgrade cpu to Intel® Core™ i7 Desktop Processor 14700F 20 Cores (8 P-cores and 12 E-cores) up to 5.4 GHz
- Add Rocket Q NVMe SSD
Mission
File storage · primary · 2 usersBackup · primary · 1 usersPhoto storage · secondary · 1 users10GbE network · secondary · 1 users
Constraints- Budget
- €1,400
- Storage
- 40 TB (parity 1)
- Energy priority
- 4/10
- Noise priority
- 3/10
- Expansion priority
- 10/10
Recommended architecture
diy · tower build on LGA 1700 + Intel Z690- Compute
- Intel Core i5 14400F
- Memory
- Corsair Vengeance Black DDR5-6400 CL36 48GB (2x24GB)
- Storage
- SanDisk NAS 800 NVMe SSD, WD Red Plus Internal NAS HDD 3.5" - 8TB
- Networking
- TRENDnet TEG-10GECTX 10 Gigabit PCIe Network Adapter 10 Gb/s Ethernet PCIe x4
- Cooling
- ARCTIC Alpine 17 CO Air 77mm Black
- Power
- be quiet! TFX Power 2 Black TFX 300W Non-Modular 80+ Gold Certified
- Expansion
- 1× PCIe, 10× M.2, 1 bay
Keep going
