Best Mini PCs for Proxmox Under $400: 2026 Home Lab Guide
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Buying mini PCs for Proxmox under $400 got harder in 2026. A DRAM and NAND shortage pushed prices on entry-level boxes 40 to 80 percent above where they sat a year ago, and cheap Chinese chassis now share Amazon shelves with two-year-old N150 stock that gets rebadged every few months. This guide covers six mini PCs for Proxmox that still make sense at this price ceiling — with real spec citations, honest gotchas, and a note on when it’s worth stretching for something bigger. Every recommendation focuses on mini PCs for Proxmox that a home lab beginner can actually deploy without surprises. Prices accurate at time of writing and subject to change.
Quick comparison
| Product | Best For | Key Spec | Price Tier | Rating | Buy Link |
|---|---|---|---|---|---|
| Beelink MINI S13 | Cheapest entry Proxmox node | N150, 16 GB DDR4, 2x M.2 | $ | 4.3/5 | Check Price on Amazon |
| Beelink EQ14 | Dual-LAN homelab firewall + VMs | N150, dual LAN, built-in PSU | $ | 4.4/5 | Check Price on Amazon |
| GMKtec NucBox G9 (V2) | Storage-heavy Proxmox + NAS hybrid | N150, 4x M.2, dual 2.5 GbE | $$ | 4.1/5 | Check Price on Amazon |
| Beelink SER5 Pro | VM density on a budget | Ryzen 7 5825U 8C/16T, 64 GB max | $$$ | 4.5/5 | Check Price on Amazon |
| Lenovo ThinkCentre M720q Tiny | Best refurbished value pick | i5-8500T 6C, VT-d, PCIe riser | $$ | 4.4/5 | Check Price on Amazon |
| Trigkey S5 (Ryzen 5 5560U) | Runner-up AMD budget node | Ryzen 5 5560U 6C/12T, dual-channel DDR4 | $$ | 4.2/5 | Check Price on Amazon |
Beelink MINI S13: cheapest entry-level Proxmox node
The cheapest sane way into mini PCs for Proxmox in 2026 — as long as you buy the dual 2.5 GbE variant.
Why it makes the list. The MINI S13 pairs Intel’s Twin Lake N150 (4 cores, up to 3.6 GHz, 6 MB cache) with dual M.2 2280 slots and 16 GB of DDR4-3200. Independent teardowns from ITPro and Liliputing confirm the two-slot storage layout, and ITPro reports Ubuntu 24.04 booting cleanly from USB — a strong signal that Proxmox VE (Debian-based) will install without wrestling drivers. At about 6 W idle, it’s the cheapest Proxmox node that can run 24/7 without noticeable impact on your power bill.
Key specs
- Intel N150, 4C/4T, up to 3.6 GHz, 6 MB L3, 6-25 W TDP
- 16 GB DDR4-3200 (single SODIMM, no dual-channel, 16 GB ceiling)
- 2x M.2 2280 slots for ZFS mirror or boot + data
- WiFi 6, Bluetooth 5.2, 4x USB 3.2 Gen 2 (10 Gbps)
- Dual 4K@60 output via 2x HDMI 2.1
- Dual 2.5 GbE variant available — verify the listing carefully
Watch out for. Beelink ships this box in at least three different SKUs. The default US Amazon listing includes only one 1 GbE port — fine for basic Proxmox learning, but useless if you plan to run a firewall VM. Read the NIC line in the listing before you click buy. Some SKUs also ship with an M.2 SATA drive instead of NVMe; swap it on day one to get the storage speed the platform is capable of.
Beelink EQ14: best low-idle-watt Proxmox pick
The S13’s dual-LAN sibling — same N150 silicon, but with two Ethernet ports and an integrated power supply.
Why it makes the list. For dual-LAN mini PCs for Proxmox at this price, the EQ14 has the field to itself. If you plan to run pfSense, OPNsense, or a Pi-hole VM alongside Proxmox, you need two NICs. The EQ14 delivers that with the same N150 silicon as the S13 and adds a built-in power supply — no external brick, one IEC cable to the wall. TweakTown’s teardown confirmed dual M.2 slots (one PCIe 3.0 x4, one PCIe 3.0 x1), and CNX Software corroborated the N150’s up-to-3.6 GHz Turbo, 6 MB cache, and 24 EU UHD graphics. Real-world power draw sits around 5 W idle and 15-18 W under moderate load per independent measurements.
Key specs
- Intel N150, up to 3.6 GHz Turbo, 6-25 W TDP
- 16 GB DDR4-3200 (single SODIMM)
- 2x M.2 2280 slots (one PCIe 3.0 x4, one PCIe 3.0 x1)
- Dual LAN — buy the explicit “Dual 2.5G” SKU only
- Front USB-C 10 Gbps (data-only, no DP alt-mode)
- Integrated 25 W AC power supply, near-silent fan
Watch out for. Beelink sells two LAN variants — plain “dual LAN” is 2x 1 GbE, only the explicit “Dual 2.5G” SKU has 2.5 GbE. The default shipped drive is often M.2 SATA rather than NVMe despite the empty PCIe 3.0 x4 slot right next to it. Single-channel DDR4 caps memory bandwidth: you can’t add a second SODIMM. And the integrated PSU can’t be replaced by the user if it eventually dies.
GMKtec NucBox G9: storage-first Proxmox + NAS hybrid
Four M.2 slots and dual 2.5 GbE make it the honest budget pick when Proxmox and ZFS storage need to live in the same chassis — buy the V2 cooling revision only. Few mini PCs for Proxmox at this price offer this much storage flexibility.
Why it makes the list. No other sub-$300 box gives you four M.2 2280 slots and dual 2.5 GbE. That combination lets a single N150 chassis run Proxmox and back a real ZFS pool. GMKtec’s product page and Liliputing’s hands-on review confirm four PCIe 3.0 x2 slots totaling up to 16 TB, a USB-C 10 Gbps data port for external storage, and a dual-boot Windows/Ubuntu setup with the OS living on 64 GB of onboard eMMC. Leave that alone and wipe Windows for Proxmox on the SSD.
Key specs
- Intel N150, 4C/4T, up to 3.6 GHz, 6 W TDP
- 12 GB LPDDR5-4800 soldered (non-upgradeable)
- 4x M.2 2280 slots at PCIe 3.0 x2 each (up to 16 TB total)
- 64 GB onboard eMMC for OS
- Dual 2.5 GbE LAN
- Dual HDMI + USB-C, up to three 4K displays
Watch out for. The original G9 had a well-documented thermal shutdown problem — the CPU could hit its 105 °C cutoff under sustained load. The mid-2025 refresh with revised cooling is what you want; confirm the listing is the V2 unit before buying. The 12 GB of soldered RAM is a hard ceiling: this is a storage node that runs a few VMs, not a VM host that happens to have storage. And the N150 only has nine PCIe lanes total, so all four M.2 slots at PCIe 3.0 x2 is the physical limit — it isn’t a performance NAS.
Beelink SER5 Pro: best VM density under $400
Eight Zen 3 cores at 15 W stock TDP is a genuine step up — this is the pick when four VMs starts feeling cramped.
Why it makes the list. The Ryzen 7 5825U packs 8 cores and 16 threads with a 4.5 GHz boost and 16 MB of L3 cache in a 15 W envelope. Beelink’s own user manual confirms two SODIMM slots supporting up to 64 GB of DDR4-3200 in dual-channel — the ceiling that actually matters when you’re layering Home Assistant, Docker, Jellyfin, and a Windows VM on the same node. MiniPCDB’s independent spec index confirms the 5825U silicon, Vega 8 iGPU, and single Gen 3 x4 NVMe slot plus a 2.5-inch SATA drive bay. Of every entry among these mini PCs for Proxmox, this one has the most VM headroom.
Key specs
- AMD Ryzen 7 5825U, 8C/16T, up to 4.5 GHz, 16 MB L3, 15 W TDP
- 16 GB DDR4-3200 dual-channel, up to 64 GB (2x 32 GB SODIMM)
- 1x M.2 2280 NVMe (PCIe 3.0 x4, up to 2 TB) + 1x 2.5-inch SATA bay
- 1x 2.5 GbE LAN, WiFi 6, Bluetooth 5.2
- Triple 4K@60 output via HDMI + DP + USB-C
- Compact ~124 x 113 x 40 mm chassis
Watch out for. There’s only one M.2 NVMe slot, so a ZFS mirror on NVMe isn’t native — use the 2.5-inch SATA bay for the second drive if mirroring matters, or accept the risk on a learning node. One 2.5 GbE port means pfSense duty requires a USB Ethernet dongle or a slower software approach. A minority of owners report thermal quirks and loose screws; inspect the chassis on arrival and re-seat the M.2 heatsink if temps look off.
Lenovo ThinkCentre M720q Tiny: best refurbished value
A 6-core Intel platform with VT-d, dual drive bays, and a PCIe riser slot — the upgrade path no Chinese mini PC in this class offers.
Why it makes the list. The refurb market is where the “budget Proxmox home lab” story got real. No other new-in-box mini PCs for Proxmox at this price point come with a PCIe expansion slot. A used M720q Tiny with an i5-8500T (6C/6T Coffee Lake, VT-d confirmed) can be had for $150-$220 on Amazon Renewed or Best Buy Refurbished. ServeTheHome’s Project TinyMiniMicro validated Proxmox VE running on the platform, and Lenovo’s optional PCIe x8 half-height riser (part 01AJ902) lets you add a genuine Intel i350-T4 quad-port NIC if you want serious networking. That’s an upgrade path you cannot buy on any current-gen Beelink or GMKtec at the same price.
Key specs
- Intel Core i5-8500T, 6C/6T, up to 3.5 GHz Turbo, 9 MB L3, VT-d supported
- 2x DDR4 SODIMM slots, up to 32 GB per Lenovo product page
- 1x M.2 NVMe (PCIe 3.0 x4) + 1x 2.5-inch SATA bay
- 1x Gigabit Ethernet + optional PCIe riser for add-in NIC
- Optional Intel AX210 WiFi 6E on some refurb SKUs
- 179 x 183 x 34.5 mm chassis, ~1.32 kg
Watch out for. Stock LAN is 1 GbE — no 2.5 GbE onboard. Adding the PCIe riser + i350-T4 combo pushes the build past $350 all-in. Coffee Lake is now 7+ years old; expect it to work reliably but see no new firmware updates from Lenovo. Refurb condition varies — check the seller’s warranty terms (Amazon Renewed is 90 days minimum) and inspect the chassis for missing screws or scratches on arrival.
Trigkey S5: runner-up AMD budget pick
Six real Zen 3 threads and dual-channel DDR4 for less than the SER5 Pro — if you can find it in stock.
Why it makes the list. The Trigkey S5 with the Ryzen 5 5560U pairs 6 Zen 3 cores and 12 threads with 16 GB of DDR4-3200 in true dual-channel (2x 8 GB), which is where it beats every N150 box for anything memory-bound. An independent Toolify teardown confirmed Crucial DDR4-3200 dual-channel, a Kingston NVMe SSD, and a removable MediaTek MT7921K WiFi 6 card. The chassis is essentially the same as the Beelink SER5 — the two brands share a corporate parent per the Amazon listings — so it’s a familiar layout with the same 2.5-inch SATA expansion bay.
Key specs
- AMD Ryzen 5 5560U, 6C/12T, up to 4.0 GHz, 8 MB L3, 15 W TDP
- 16 GB DDR4-3200 dual-channel (2x 8 GB), up to 64 GB
- 1x M.2 2280 NVMe (up to 2 TB) + 1x 2.5-inch SATA bay
- 1x Gigabit Ethernet on the mainstream 5560U SKU
- Triple 4K display via DP + HDMI + USB-C
- WiFi 6 (removable card), Bluetooth 5.2
Watch out for. Only 1 GbE on the current 5560U SKU (the older 5500U SKU has 2.5 GbE — confusing lineup). Single M.2 NVMe slot only, so ZFS NVMe mirror isn’t native. Trigkey and Beelink share a manufacturer, and support quality tends to match — treat the Amazon return window as your real warranty here. When you’re stack-ranking mini PCs for Proxmox in this price bracket, the SER5 Pro is the safer pick unless the S5 is meaningfully cheaper on the day you shop.
What to look for in mini PCs for Proxmox on a budget
Four things matter more than benchmark scores when picking mini PCs for Proxmox under $400.
RAM ceiling and channel count. Proxmox itself only needs a couple of GB, but each VM eats its own. Homelab veterans consistently land on 32-64 GB as the practical range once you’ve spun up 4-5 VMs, and 64 GB+ once storage or Windows guests get involved. That’s why an N150 box with a 16 GB single-channel cap is a starter node, not a forever node — and it’s why the Ryzen boxes with 64 GB dual-channel headroom are worth the extra $100-$150 if you’ll actually use it.
Two M.2 slots for ZFS mirroring. Proxmox best practice is to mirror boot and VM storage so a single SSD failure doesn’t take the node offline. Boxes with only one M.2 slot force you into no redundancy or a USB-attached fallback — neither is fun to recover from.
Verified NICs. Realtek 2.5 GbE controllers have had link-drop histories on Linux under sustained load on some kernel and BIOS combinations. If your Proxmox node will run pfSense or a router VM full time, an Intel NIC (via the Lenovo PCIe riser trick or, later, an SFP+ card in a bigger chassis) is the safer bet. For general homelab work — Docker, Home Assistant, Jellyfin — Realtek 2.5 GbE is fine.
Idle power draw. These boxes run 24/7, so the difference between 6 W and 25 W idle compounds fast on your electricity bill. The N150 boxes on this list all measure 6-9 W idle in independent testing; the Ryzen boxes idle closer to 15-20 W. Neither is bad, but “always-on” changes the math when you multiply by 8,760 hours.
For more context on the surrounding infrastructure your Proxmox box will plug into, see the right 10GbE switch for a home lab and picking a Home Assistant Zigbee coordinator.
FAQ
Is an Intel N150 mini PC powerful enough for Proxmox?
Yes, for a first Proxmox node running 3-5 lightweight VMs. Among the current crop of mini PCs for Proxmox in the sub-$300 tier, Intel’s N150 idles at 6-9 W and boosts to 3.6 GHz on a single core; independent testing by Liliputing and Neowin confirms it handles Home Assistant, Pi-hole, and light Docker stacks without breaking a sweat. It is not the right pick if you plan to run Windows guest VMs, transcode Plex in software, or spin up more than 4-5 concurrent VMs.
How much RAM do I need for a Proxmox home lab?
The operational baseline most homelab forums land on is 16 GB for evaluation, 32-64 GB for a balanced 3-5 VM setup, and 64 GB+ once ZFS or Windows guests get involved. Proxmox itself is lightweight, but Linux VMs eat 1-2 GB each and Windows guests eat 4-8 GB. That’s exactly why the sub-$400 field of mini PCs for Proxmox splits cleanly into “N150 starter node” and “Ryzen 5825U forever node.”
Do I need 2.5 GbE for Proxmox at home?
For a single node serving VMs and a network share, 1 GbE is fine. You want 2.5 GbE (or faster) the moment you cluster nodes, run live migration between them, or share storage over the network. For pfSense or OPNsense duty inside a Proxmox VM, two NICs matter more than raw NIC speed — among the mini PCs for Proxmox reviewed here, the EQ14 and the NucBox G9 both give you dual 2.5 GbE at this price point.
Are refurbished Lenovo Tiny PCs good for Proxmox?
Yes. ServeTheHome’s Project TinyMiniMicro has documented Proxmox VE running cleanly on the M720q Tiny, and the platform’s PCIe riser plus optional Intel NIC upgrade path is unique in this class. The main tradeoff is age: Coffee Lake is 8 years old, has no new firmware coming, and lacks 2.5 GbE onboard. Buy it for what it is — a proven, upgradable, cheap-to-acquire node. For an even cheaper starting point that still runs Proxmox, see our companion guide to the best budget thin clients for a Proxmox home lab.
Should I cluster three cheap mini PCs or buy one bigger one?
If your goal is learning the platform, three N150 boxes at roughly $200 each will teach you more about live migration, high availability, and node failure than one Ryzen box at $600 ever will. If your goal is running services reliably and forgetting about them, one Ryzen 7 5825U node with 32-64 GB of RAM is the better answer. Both are legitimate paths; pick the one that matches how you want to spend your evenings.
The bottom line on mini PCs for Proxmox in 2026
Every one of the six mini PCs for Proxmox on this list has been verified against manufacturer specs and at least two independent reviews. If it’s your first Proxmox node and you just want to learn the platform without spending real money, get the Beelink EQ14 in the dual 2.5 GbE variant — it’s the sweet spot for idle wattage, dual LAN, and price. If you already know you’ll be running 5+ VMs or a Windows guest, the Beelink SER5 Pro with a Ryzen 7 5825U and 64 GB RAM headroom is worth the extra $100-$150. And if you value upgradability over shiny new silicon, a refurbished Lenovo ThinkCentre M720q Tiny with a PCIe NIC riser is the platform that has been quietly running homelabs for the last five years and will keep running for another five. Prices accurate at time of writing and subject to change.
