ASRock
ASRock 1U4LW-X470 1U Rackmount Server - AMD AM4 Barebone
★★★★★
AM4 server performance in 1U — the ASRock 1U4LW-X470 delivers ECC memory support and hot-swap storage in a rack-dense barebone.
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Overview
ASRock Rack 1U4LW-X470: A Powerful Foundation for Your Server Needs
The ASRock Rack 1U4LW-X470 is a high-performance 1U rackmount server barebone system, designed for demanding applications. Featuring an AMD Promontory X470 chipset, DDR4 memory support, and ample storage options, it provides a robust and scalable platform for your server infrastructure.
Specifications:
- Motherboard: Support X470D4U(mATX, 9.6'' x 9.6'')
- Processor: AM4 PGA 1331
- Chipset: AMD Promontory X470
- Memory: 4x 288-pin DDR4 Slots, Dual Channel, Support ECC and non-ECC UDIMM, max. 128 GB
- Slots: 1x PCI-Express 3.0 x16 Slots, 1x PCI-Express 3.0 x8 Slot
- SATA: 6 x SATA3 6.0 Gb/s (1x SATA DOM port), support RAID 0, 1, 10
- Video: Aspeed AST2500 Graphics DDR4 16MB
- LAN: 2x RJ45 GLAN by Intel i210AT, 1x Realtek RTL8211E for dedicated management GLAN
- Drive Bays: External (Hot-swap 3.5 HDD x 4 or 2.5 HDD x4 . Slim ODD x1 or 2.5'' HDDx 1 (optional)), Internal (2.5" HDD x 2), 2x Internal side Backplane: N/A
- Ports: 1x D-Sub VGA port, 2x USB 3.1 Gen1 port, RJ45:2+1(IPMI), LAN Ports with LED (ACT/LINK LED and SPEED LED), 1x Serial port
- Power Supply: 400W, Single PSU
Key Features
Motherboard
Support X470D4U(mATX, 9.6'' x 9.6'')
Processor
AM4 PGA 1331
Chipset
AMD Promontory X470
Memory
4x 288-pin DDR4 Slots, Daul Channel, Support ECC and non-ECC UDIMM, max. 128 GB
Slots
1x PCI-Express 3.0 x16 Slots, 1x PCI-Express 3.0 x8 Slot
Pros & Cons
👍 Pros
- ECC UDIMM support via AMD Ryzen Pro on AM4 brings enterprise-grade memory error correction to a cost-effective 1U platform that consumer motherboards can't match.
- Four hot-swap drive bays enable storage swaps without taking the server offline, critical for small business NAS and always-on storage applications.
- Dual Intel i210AT NICs provide enterprise-class network reliability with a separate dedicated IPMI port for out-of-band management — a three-NIC configuration in 1U.
- RAID 0/1/10 native support across six SATA3 ports allows flexible redundancy configurations without requiring a separate controller card.
- The PCIe 3.0 x16 slot accommodates GPU passthrough, 10GbE NICs, or NVMe expansion cards, extending the platform's capability well beyond basic storage-only workloads.
👎 Cons
- The 400W single PSU is a single point of failure — there is no redundant PSU option in this chassis, which limits deployment in environments requiring five-nines uptime.
- AM4 with X470 is a previous-generation platform; no PCIe 4.0 support means NVMe storage is capped at Gen 3 speeds, a meaningful bottleneck for high-throughput workloads.
- As a barebone, the system ships without CPU, RAM, or drives, requiring additional component sourcing and configuration time before deployment.
- 1U chassis depth and the single fan arrangement create a concentrated thermal environment — sustained high-TDP Ryzen configurations may require careful airflow management in dense rack deployments.
- The x8 PCIe slot runs electrically as x8, not x16, which limits bandwidth for dual-port 10/25GbE cards compared to purpose-built server platforms with additional PCIe lanes.
Frequently Asked Questions
What processors are compatible with this barebone system?
The 1U4LW-X470 uses the AM4 PGA 1331 socket with the X470 chipset, which supports AMD Ryzen 2000 and 3000 series desktop processors, as well as AMD Ryzen Pro variants. It does not support Threadripper — that requires TR4 socket platforms. Verify your specific CPU's TDP against the 400W PSU headroom before configuring.
Does this system support ECC memory, and what's the maximum RAM configuration?
Yes — this is one of its key differentiators from consumer AM4 boards. The four DDR4 UDIMM slots support both ECC and non-ECC memory in dual-channel configuration, up to 128GB total. ECC support requires a compatible AMD Ryzen Pro or Athlon Pro processor; standard Ryzen CPUs will run non-ECC only.
What storage options does this chassis support?
The system offers considerable flexibility: four external hot-swap 3.5" or 2.5" drive bays, two internal 2.5" bays, six SATA3 6.0 Gb/s ports with RAID 0/1/10 support, and one SATA DOM port for a bootable OS module. An optional slim ODD or additional 2.5" bay is available in the external bay configuration.
What remote management capabilities does this server include?
The system includes an Aspeed AST2500 BMC with a dedicated IPMI management LAN port (Realtek RTL8211E) separate from the two Intel i210AT data NICs. This allows full out-of-band management including KVM-over-IP, power control, and hardware monitoring without requiring the host OS to be running.
Is the included 400W PSU sufficient for a fully loaded configuration?
For most AM4 workloads — a mid-range Ryzen processor, 64GB RAM, and four spinning drives — 400W provides adequate headroom. A high-TDP Ryzen 9 combined with four drives and a PCIe card could approach the limit under sustained load. Budget builders should account for this before maxing out the PCIe slots.
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