An energy-efficient always-on homelab for containers, Home Assistant and backups that won't spike your power bill. Prices and availability for Spain.
Recommended build
Architecture: mini build on LGA 1700 + Intel Z790
≈ €1,040
Total
Assessmentbalanced
cpu
4C/8T · 4.7 GHz · 60 W
motherboard
Intel Z790 · ATX · 3× M.2
ram
64 GB DDR4 · 4000 MT/s
case
ATX/MATX/ITX/EATX · 2× 3.5″
cooling
passive · 150 W TDP
psu
1000 W · titanium · modular
storage
NVME · 8 TB
storage
3.5 HDD · 16 TB
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Based on your goals you need roughly 4 CPU threads, 34GB RAM and 4TB of storage. This system runs 24/7, so energy matters. Recommended: the Silent build — acoustics first — 1040€ purchase, ~39W idle, ~135€/year energy (≈404€ over 3 years). Intel Core i3 14100: 8 threads covers the 4 needed with headroom. Motherboard Intel Z790 (LGA 1700): matches the CPU socket and case size. RAM: 64GB DDR4 — meets the 34GB the workload requires. Chose Intel Core i3 14100 over Intel Core i3 14100F: better overall fit for your priorities. Build DNA: performance 100, value 91, efficiency 70, expandability 100, silence 95, longevity 100 — overall 92/100. Heads-up: System idles ~39W vs maxIdlePowerW=35W requested (CPU ~9W + drives/fans). Closest efficient option shown — lower the workload or raise the cap for full compliance. Total (1040€) exceeds your budget (600€) by 440€ (73%). Ranking already prefers in-budget variants — this one is shown for comparison; check the value variant or raise the budget. What limits you first: RAM. Alternatives: Smart build — best all-round — 1040€, DNA 89/100, balanced · Value build — most for your money — 1040€, DNA 91/100, balanced · Long-term build — expandable & future-proof — 1250€, DNA 92/100, balanced · Efficiency build — lowest energy — 1040€, DNA 87/100, balanced.
The system as a whole — before the shopping list.
The system as a whole — before the shopping list.
diy · mini build on LGA 1700 + Intel Z790
We split your build into the performance you need, the performance you're buying, and the performance you're likely to use day-to-day. When the gap is wide, you're overbuying.
BALANCED — the build is sized close to what the workload requires.
| Performance I need | Performance I buy | Likely to use | |
|---|---|---|---|
| CPU threadsoverbuy | 4 | 8 | 2 |
| RAM | 34 | 64 | 23 |
| Storageoverbuy | 4 | 24 | 4 |
| GPU VRAM | — | — | — |
| Network | 2.5G | 1.0G | 1.0G |
What this means
An explainable future-proof score, the Homelab Risk Score, a final pre-purchase audit and what will become the limiting factor over time.
Strong future-proofing
Strong future-proofing (79/100) — this build should stay relevant for years without major surgery.
DIY build — the CPU, motherboard and PSU can each be upgraded independently without replacing the whole system.
Expansion headroom: 2 PCIe slot(s), 2 M.2, 3 SATA, 1 drive bay(s), 2 RAM slot(s) free.
Storage is 15% utilized with 1 free drive bay(s) and 3 free SATA port(s).
2 RAM slot(s) free; memory is 54% utilized.
Networking is 2500 Mbps, and a free PCIe slot can add a faster NIC later.
ATX form factor with standard, socketed components — most parts are easy to replace.
No GPU, but there is room (2 PCIe slot(s), PSU headroom 9.6x) to add one for AI/transcoding.
Moderate risk
Moderate risk (41/100) — a few items are worth fixing before you commit (see checklist).
Single point of failure
Risk: highStorage has no redundancy (2 drives, no mirror/parity) — a single drive failure exposes the array.
Fix: Add at least a mirror (RAID 1/ZFS mirror) for irreplaceable data, or an additional parity drive for larger arrays.
Storage risk
Risk: medium1 desktop hard drive(s) — not rated for 24/7 duty, vibration or heat; higher long-run failure risk.
Fix: For an always-on system, prefer NAS/CMR-rated drives; monitor SMART and replace before the warranty ends.
Data loss risk
Risk: critical2 drive(s), no redundancy, hard-drive media — the worst combination for keeping data safe.
Fix: Add redundancy and an off-site/off-box backup for anything irreplaceable.
Power risk
Risk: lowPSU is 1000W, peak load 104W (10%).
Fix: PSU sizing leaves healthy headroom for spikes and future parts.
Network risk
Risk: lowSingle 2500 Mbps NIC — a switch/port failure takes the box fully offline, and multi-user media can saturate 2500 Mbps.
Fix: Consider a second NIC or a managed switch; for heavy media, plan for 2.5/10G before the build.
Expansion risk
Risk: low2 PCIe, 2 M.2, 3 SATA, 1 bays free.
Fix: Healthy room for future drives, NICs and accelerators.
Upgrade risk
Risk: low2024 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.
Audit found 2 critical and 1 warning item(s) worth fixing before you buy.
Check the balance
CriticalTotal (1040€) exceeds your budget (600€) by 440€ (73%). 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.
Category: balance
No storage redundancy
Critical2 drive(s) with no mirror or parity for the data you plan to store.
Action: Add at least a mirror for irreplaceable data before you migrate anything.
Category: storage
Review
WarningSystem idles ~39W vs maxIdlePowerW=35W requested (CPU ~9W + drives/fans). Closest efficient option shown — lower the workload or raise the cap for full compliance.
Action: Weigh this trade-off against your priorities.
Category: balance
Use NAS-rated drives
OptimizationDesktop drives in an always-on NAS/server role have higher long-run failure rates.
Action: Prefer NAS/CMR-rated drives for 24/7 duty.
Category: storage
Keep a backup off-box
OptionalRedundancy 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.
Category: storage
RAM expansion available
Future2 RAM slot(s) free for a later upgrade.
Action: Leave them free until the workload actually grows.
Category: memory
Drive bays remain
Future1 drive bay(s) free for future capacity.
Action: Expand capacity in pairs (mirror/parity) when needed.
Category: storage
PCIe slot available
Future2 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.
Category: expansion
Nothing obvious becomes a limiting factor in the near term — this build should age well.
RAM is the closest to its limit (54% of capacity in use) — it will likely force the next upgrade.
Runner-up variants the engine generated for the same scenario — tap one to see its parts.
mini build on LGA 1700 + Intel Z790 · Idle 39 W · balanced
≈ €1,040
| Role | Component | Qty | Price | Buy |
|---|---|---|---|---|
| cpu | Intel Core i3 14100 | 1 | €164 | … |
| motherboard | Gigabyte Z790 AORUS ELITE AX DDR4 ATX | 1 | ≈ €139 | … |
| ram | Corsair Vengeance LPX Black DDR4-4000 CL18 64GB (2x32GB) | 1 | ≈ €137 | … |
| case | Geometric Future Model 5 Fanless ATX Mid Tower White Tempered Glass Side Panel | 1 | €18 | … |
| cooling | Thermalright Le Grand Macho Air 159mm Fanless | 1 | ≈ €35 | … |
| psu | be quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black | 1 | €73 | … |
| storage | Rocket Q NVMe SSD | 1 | €122 | … |
| storage | Seagate Exos X18 16TB HDD 3.5" SAS 12.0 Gb/s | 1 | ≈ €352 | … |
| Total: | ≈ €1,040 | |||
mini build on LGA 1700 + Intel Z790 · Idle 39 W · balanced
≈ €1,040
| Role | Component | Qty | Price | Buy |
|---|---|---|---|---|
| cpu | Intel Core i3 14100 | 1 | €164 | … |
| motherboard | Gigabyte Z790 AORUS ELITE AX DDR4 ATX | 1 | ≈ €139 | … |
| ram | Corsair Vengeance LPX Black DDR4-4000 CL18 64GB (2x32GB) | 1 | ≈ €137 | … |
| case | Geometric Future Model 5 Fanless ATX Mid Tower White Tempered Glass Side Panel | 1 | €18 | … |
| cooling | Thermalright Le Grand Macho Air 159mm Fanless | 1 | ≈ €35 | … |
| psu | be quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black | 1 | €73 | … |
| storage | Rocket Q NVMe SSD | 1 | €122 | … |
| storage | Seagate Exos X18 16TB HDD 3.5" SAS 12.0 Gb/s | 1 | ≈ €352 | … |
| Total: | ≈ €1,040 | |||
mini build on AM5 + AMD B850 · Idle 37 W · balanced
≈ €1,250
| Role | Component | Qty | Price | Buy |
|---|---|---|---|---|
| cpu | AMD Ryzen 5 9600 | 1 | €286 | … |
| motherboard | ASRock B850M PRO-A WIFI AM5 DDR5 Micro ATX | 1 | €195 | … |
| ram | TEAMGROUP T-Create Expert Black / Gold DDR5-6400 CL32 48GB (2x24GB) | 1 | ≈ €169 | … |
| case | Geometric Future Model 5 Fanless ATX Mid Tower White Tempered Glass Side Panel | 1 | €18 | … |
| cooling | Noctua NH-U12P SE2 Air 158mm 54.36 CFM | 1 | ≈ €35 | … |
| psu | be quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black | 1 | €73 | … |
| storage | Rocket Q NVMe SSD | 1 | €122 | … |
| storage | Seagate Exos X18 16TB HDD 3.5" SAS 12.0 Gb/s | 1 | ≈ €352 | … |
| Total: | ≈ €1,250 | |||
mini build on LGA 1700 + Intel Z790 · Idle 39 W · balanced
≈ €1,040
| Role | Component | Qty | Price | Buy |
|---|---|---|---|---|
| cpu | Intel Core i3 14100 | 1 | €164 | … |
| motherboard | Gigabyte Z790 AORUS ELITE AX DDR4 ATX | 1 | ≈ €139 | … |
| ram | Corsair Vengeance LPX Black DDR4-4000 CL18 64GB (2x32GB) | 1 | ≈ €137 | … |
| case | Geometric Future Model 5 Fanless ATX Mid Tower White Tempered Glass Side Panel | 1 | €18 | … |
| cooling | Thermalright Le Grand Macho Air 159mm Fanless | 1 | ≈ €35 | … |
| psu | be quiet! Dark Power 13 Fully Modular ATX Power Supply - 1000 Watts ATX 3.1 - Black | 1 | €73 | … |
| storage | Rocket Q NVMe SSD | 1 | €122 | … |
| storage | Seagate Exos X18 16TB HDD 3.5" SAS 12.0 Gb/s | 1 | ≈ €352 | … |
| Total: | ≈ €1,040 | |||
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