ASRock
ASRock 1U4LW-B650/2L2T Ryzen 7000 Series 1U Rackmount Server
400W
AM5 Ryzen 7000 processing power, dual 10GbE networking, and IPMI remote management in a 1U chassis — enterprise-grade features at desktop-platform cost.
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Overview
Maximize Performance with the ASRock Rack 1U Server Barebone
The ASRock Rack 1U4LW-B650/2L2T is a high-performance 1U rackmount server barebone designed for general-purpose and storage applications. Featuring a single socket AM5, it supports AMD Ryzen 7000 series processors, providing exceptional power and flexibility.
- Brand: ASRock
- Series: 1U4LW-B650/2L2T
- Power Supply: 1, 80-PLUS Gold, 400W PSU
- CPU Socket: Single Socket AM5 (LGA 1718), supports AMD Ryzen 7000 series processors
- Memory: 4 DIMM slots (2DPC), supports DDR5 ECC/non-ECC UDIMM
- Drive Bays: 4 hot-swap 3.5" SATA drive bays
- Expansion Slots: 1 FH PCIe4.0 x16
- M.2 Slots: Supports 1 M.2 (PCIe5.0 x4)
- Ethernet: 2 RJ45 (10GbE) by Broadcom BCM57416, 2 RJ45 (1GbE) by Intel® i210
- Video Output: 1 HDMI, 1 DisplayPort
- Remote Management: IPMI
- Recommended Use: General-Purpose, Storage
- Material: Alloy Steel
- Power Supply Mounting Type: Rear Mount
- Cooling Method: Air
- Model Name: 1U4LW-B650/2L2T
- Number of Expansion Slots: 1
- Total Internal Bays: 4
- Compatible Devices: Servers
Key Features
1U Rackmount with 1, 80-PLUS Gold, 400W PSU
Single Socket AM5 (LGA 1718), supports AMD Ryzen 7000 series processors
4 DIMM slots (2DPC), supports DDR5 ECC/non-ECC UDIMM
4 hot-swap 3.5" SATA drive bays
1 FH PCIe4.0 x16
Pros & Cons
👍 Pros
- AM5 socket supports the full Ryzen 7000 lineup, delivering up to 16 cores and 32 threads in a 1U footprint at desktop-platform pricing rather than EPYC licensing costs
- Dual Broadcom BCM57416 10GbE ports provide 20Gbps aggregate wired bandwidth — the right NIC tier for NAS, media server, or virtualization host workloads
- PCIe 5.0 x4 M.2 slot enables NVMe boot drives with sustained sequential reads exceeding 10GB/s on current-generation SSDs
- Four hot-swap 3.5" SATA bays allow drive replacement under power without shutting down, which is critical for always-on storage deployments
- IPMI out-of-band management delivers full KVM-over-IP, power cycling, and BIOS access without physical presence at the machine
- 80-PLUS Gold 400W PSU maintains above 87% efficiency under typical load, meaningfully reducing power cost in always-on deployments
👎 Cons
- 400W PSU ceiling constrains CPU selection — TDP-heavy processors like the Ryzen 9 7950X under sustained full load combined with four spinning drives approaches the supply's practical limit
- Single PCIe 4.0 x16 slot forces a hard choice between GPU compute and additional NIC expansion — only one can be installed
- DDR5 ECC UDIMM support is technically excellent but adds meaningful cost to total build versus DDR4 ECC platforms; verify your budget accounts for current DDR5 pricing
- SATA-only front bays mean no native hot-swap NVMe support for front-accessible drives — NVMe is limited to the internal M.2 slot
- 1U chassis height enforces strict CPU cooler height limits — verify your cooler's spec against ASRock's maximum cooler height tolerance before purchasing
Frequently Asked Questions
Which Ryzen 7000 processors are supported, and is ECC memory required?
The AM5 socket supports the full Ryzen 7000 lineup. ECC memory is supported but not required — standard DDR5 non-ECC UDIMMs work equally well, giving you a meaningful cost reduction if data integrity at the ECC level isn't a hard requirement for your workload.
Does the IPMI management interface require a dedicated network connection?
Yes. The IPMI port is physically separate from the 10GbE and 1GbE data ports. Connect it to your out-of-band management network or a dedicated switch port to ensure KVM, power cycling, and BIOS access remain available independent of the host OS state.
Can this server run Proxmox VE or other hypervisors reliably?
Proxmox VE runs cleanly on Ryzen 7000 hardware and is the straightforward choice for open-source virtualization on this platform. VMware ESXi has inconsistent AM5 driver support depending on version; Proxmox or Windows Server Hyper-V are the more reliable hypervisor paths here.
What CPU TDP is practical given the 400W PSU?
The 400W Gold-rated PSU provides comfortable headroom for mid-range Ryzen 7000 processors in the 65–105W TDP range with four spinning drives. High-TDP options like the Ryzen 9 7950X under sustained full load will push close to the PSU ceiling — a Ryzen 7 7700 or Ryzen 9 7900X is a better-matched choice for this chassis.
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