Choosing a bare metal server means deciding how much hardware you want ready to run and how much flexibility you need to build it yourself. My strongest ready-to-deploy pick is the HPE ProLiant DL380 Gen11: it arrives with ECC memory, two SSDs, RAID, redundant power, and iLO management. For a builder who wants newer desktop-class CPU options and flexible drive bays, the ASRock Rack 1U4LW-X570 is the more adaptable barebone.
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The other two make narrower cases. The Lenovo ThinkSystem ST50 bundle adds a UPS and substantial hard-drive capacity, but it is a renewed tower with a short warranty and installation work still required. The Supermicro SYS-5018A-TN4 is a low-power, compact 1U platform with four LAN ports, though its older Atom platform and 32GB memory ceiling limit its headroom. I rank these by how well their included configuration, platform capacity, management, and tradeoffs suit distinct bare-metal workloads—not by assuming every server is right for every buyer.
Key Takeaways
- The HPE DL380 Gen11 is the most complete business-ready rack option here, with a 12-core Xeon Silver, 64GB ECC RAM, two SSDs, RAID, redundant power, and iLO 6.
- The ASRock Rack 1U4LW-X570 is the most configurable 1U choice for a buyer supplying a compatible Ryzen 5000 CPU, memory, and other build components.
- The Lenovo ST50 bundle is the only tower and includes a UPS, but its three HDDs and memory upgrades require installation, and its warranty is limited to 90 days.
- The Supermicro SYS-5018A-TN4 offers four LAN ports and an eight-core low-power Atom, but it is a barebone platform capped at 32GB ECC memory.
- Rack buyers should weigh the HPE’s redundant power and remote management against the ASRock’s drive flexibility; neither should be mistaken for a fully equivalent out-of-box setup.
| HPE ProLiant DL380 Gen11 Rack Server with Intel Xeon Silver 4410Y |  | Best Overall: the most complete rack-ready business configuration | Processor: Intel Xeon Silver 4410Y, 12 cores, 2.0 GHz | Memory: 64GB DDR5 ECC RDIMM; up to 8TB stated | Included storage: 2 × 960GB SATA SSDs | VIEW LATEST PRICE | See Our Full Breakdown |
| ASRock Rack 1U4LW-X570 1U Rackmount Server Barebone |  | Best Configurable Barebone: flexible drive layout and Ryzen 5000 support | Form factor: 1U rackmount barebone | Processor compatibility: AMD Ryzen 5000 Series desktop processors | Memory: Four DDR4 ECC or non-ECC UDIMM slots; up to 32GB per module | VIEW LATEST PRICE | See Our Full Breakdown |
| Supermicro SYS-5018A-TN4 1U Rackmount Server Barebone System |  | Best Low-Power Compact Option: four LAN ports in a simple 1U platform | Processor: Intel Atom C2750, eight cores, up to 20W TDP | Memory: Four DDR3-1600/1333 ECC SO-DIMM slots; up to 32GB | Expansion: One PCIe 2.0 x8 slot via riser | VIEW LATEST PRICE | See Our Full Breakdown |
| Lenovo ThinkSystem ST50 Tower Server Bundle with APC BR1500MS UPS, Intel Xeon E-2124G, 32GB RAM, 6TB Storage (Renewed) |  | Best Tower Bundle: a UPS and bulk HDD storage for a small office | Form factor: Mini tower | Processor: Intel Xeon E-2124G, four cores, 3.4GHz; up to 4.5GHz Turbo | Memory: 32GB DDR4 2666MHz, with upgrade installation required | VIEW LATEST PRICE | See Our Full Breakdown |
| bare metal server | Memory | Networking | Form factor | Processor |
|---|---|---|---|---|
| HPE ProLiant DL380 Gen11 Rack | 64GB DDR5 ECC RDIMM; up to 8TB stated | Four 1GbE BASE-T ports | 2U rack server; 57.3 lb | Intel Xeon Silver 4410Y, 12 cores, 2.0 GHz |
| ASRock Rack 1U4LW-X570 1U Rack | Four DDR4 ECC or non-ECC UDIMM slots; up to 32GB per module | 2 × 1GbE Intel i210; dedicated IPMI | 1U rackmount barebone | — |
| Supermicro SYS-5018A-TN4 1U Ra | Four DDR3-1600/1333 ECC SO-DIMM slots; up to 32GB | Four RJ45 LAN ports | 1U rackmount | Intel Atom C2750, eight cores, up to 20W TDP |
| Lenovo ThinkSystem ST50 Tower | 32GB DDR4 2666MHz, with upgrade installation required | 1 × 1GbE | Mini tower | Intel Xeon E-2124G, four cores, 3.4GHz; up to 4.5GHz Turbo |
More Details on Our Top Picks
HPE ProLiant DL380 Gen11 Rack Server with Intel Xeon Silver 4410Y
The DL380 Gen11 takes first place because it asks for the least guesswork before becoming a useful business server. It pairs a 12-core Xeon Silver 4410Y with 64GB of DDR5 ECC memory, two 960GB SATA SSDs, an HPE RAID controller, and dual 800W Platinum power supplies. For virtualization, file services, and database duties, that combination gives a buyer a workable starting point rather than an empty chassis that needs a shopping list of core components.
Its strongest advantage over both barebone rack options is operational completeness. iLO 6 provides remote management, while TPM 2.0, Secure Boot, and Silicon Root of Trust features speak to buyers who need to manage firmware and access deliberately. The eight SFF bays also leave room to expand beyond the included pair of SSDs. Compared with the ASRock 1U, the HPE starts with storage and memory installed and offers redundant power; compared with the Lenovo tower, it is designed for a rack environment and includes enterprise-style remote management.
That completeness does not mean the configuration is finished for every workload. Only two of eight drive bays are occupied, and the four integrated network ports are 1GbE, which may become a bottleneck for high-throughput storage, virtualization clusters, or data-heavy transfers. Buyers should also plan around a substantial 2U chassis weighing 57.3 pounds, not a compact desktop server. I rank it first for its balance of ready-to-use hardware, expansion, and resilience, while recognizing that faster networking or more drives may be needed.
Pros:- Includes 64GB DDR5 ECC memory, two 960GB SSDs, and an HPE RAID controller.
- Dual 800W Platinum power supplies add power redundancy.
- iLO 6 remote management supports administration without relying on local access.
- Eight SFF bays and a stated memory ceiling of up to 8TB provide substantial expansion potential.
Cons:- Only two of the eight drive bays are occupied in the supplied configuration.
- Integrated networking is four-port 1GbE, not a faster server network interface.
- The 2U rack chassis is heavy and requires suitable rack space and handling.
Best for: Small and midsize businesses, IT teams, and virtualization or file-server buyers who want a rack server with core components, remote management, and redundant power already included.
Not ideal for: Buyers who need high-speed networking out of the box, a compact or quiet desktop system, or an inexpensive barebone platform they intend to configure entirely themselves.
- Processor:Intel Xeon Silver 4410Y, 12 cores, 2.0 GHz
- Memory:64GB DDR5 ECC RDIMM; up to 8TB stated
- Included storage:2 × 960GB SATA SSDs
- Drive bays:8 SFF hot-plug bays
- RAID:HPE MR408i-o, 4GB cache; RAID 0/1/10
- Networking:Four 1GbE BASE-T ports
- Power:2 × 800W Platinum power supplies
- Remote management:HPE iLO 6
- Form factor:2U rack server; 57.3 lb
Our verdict“I recommend the DL380 Gen11 as the strongest all-round bare metal server here for buyers who value a ready business configuration, remote administration, and redundant power over compactness or faster included networking.”
ASRock Rack 1U4LW-X570 1U Rackmount Server Barebone
The ASRock Rack 1U4LW-X570 is my pick for a builder who wants to choose the CPU and memory rather than inherit a fixed configuration. Its support for AMD Ryzen 5000 desktop processors creates a different path from the HPE’s preconfigured Xeon system: you can select a compatible processor and ECC or non-ECC DDR4 UDIMMs to match a particular lab, storage, or general-purpose server build. It offers four hot-swap 3.5-inch bays plus three fixed 2.5-inch bays, an unusually useful combination for a 1U chassis.
Dedicated IPMI is an important point of separation from ordinary desktop components: remote management can help a rack owner administer the machine without treating it like a local workstation. The PCIe 4.0 x16 slot also gives this barebone a newer expansion interface than the Supermicro’s PCIe 2.0 x8 riser. Compared with the HPE, though, the ASRock is not ready to serve as supplied: the buyer must select and install a processor, memory, and the remaining required components. It includes a 400W supply, but no redundant power supply is listed.
The drive layout makes this a better fit for buyers planning a mixed storage build than the HPE’s two included SSDs or the Lenovo’s three HDDs in a tower. Still, 1U limits the physical space available for cards and cooling choices, and there is only one PCIe expansion slot. Its two 1GbE ports also leave network upgrades on the planning list for bandwidth-heavy use. I rank it below the HPE because flexibility demands more buyer effort and does not bring the same supplied redundancy, but above the older Supermicro for its more current expansion interface and broader drive arrangement.
Pros:- Supports AMD Ryzen 5000 Series processors and ECC or non-ECC DDR4 UDIMMs.
- Combines four hot-swap 3.5-inch bays with three fixed 2.5-inch bays.
- Dedicated IPMI supports remote administration.
- PCIe 4.0 x16 offers a newer expansion interface than the Supermicro’s PCIe 2.0 x8.
Cons:- Barebone configuration requires the buyer to supply compatible core components.
- One PCIe expansion slot limits add-in card options.
- The 400W supply is not described as redundant, and onboard networking is limited to two 1GbE ports.
Best for: Experienced home-lab builders and small-server integrators who want a 1U chassis, hot-swap 3.5-inch storage, Ryzen 5000 CPU choice, and dedicated IPMI.
Not ideal for: Buyers who need a complete server immediately, require redundant power or several PCIe cards, or prefer a vendor-configured Xeon system with memory and storage already installed.
- Form factor:1U rackmount barebone
- Processor compatibility:AMD Ryzen 5000 Series desktop processors
- Memory:Four DDR4 ECC or non-ECC UDIMM slots; up to 32GB per module
- Drive bays:4 hot-swap 3.5-inch and 3 fixed 2.5-inch bays
- Expansion:1 full-height, half-length PCIe 4.0 x16 slot
- Networking:2 × 1GbE Intel i210; dedicated IPMI
- Power supply:400W, 100–240V
- Warranty:3 years
Our verdict“I would choose the ASRock Rack when component choice and a flexible hot-swap drive layout matter more than an out-of-box configuration or redundant power.”
Supermicro SYS-5018A-TN4 1U Rackmount Server Barebone System
The Supermicro SYS-5018A-TN4 has a clear niche: a compact 1U barebone built around an eight-core Intel Atom C2750 with a listed maximum TDP of 20W. That low-power processor profile points toward modest always-on duties such as a lightweight network appliance, basic service host, or lab node—not a modern consolidation server expected to run many demanding virtual machines. Its four RJ45 LAN ports are the main practical draw against the ASRock’s two ports and the HPE’s four 1GbE ports in a much larger, more capable system.
This platform provides multiple SATA connections, four DDR3 SO-DIMM slots, and support for ECC memory up to 32GB. That makes it a comparatively direct fit for a simple build where low component needs and several wired network connections matter more than capacity growth. The ASRock gives a buyer a newer PCIe 4.0 x16 slot, Ryzen 5000 compatibility, and more varied drive bays; the Supermicro answers with a lightweight 1U chassis and a lower-power Atom design. Its PCIe 2.0 x8 riser is much less attractive for newer or bandwidth-hungry expansion cards.
It is also a barebone system, so buyers should confirm which required components are included before planning deployment. The 32GB memory ceiling is its most consequential long-term limit: compared with the HPE’s stated 8TB maximum or the ASRock’s four UDIMM slots, it gives far less room for workload growth. The C2750 and DDR3 platform are also an older generation, so the attraction is its specific compact, low-power role rather than broad performance headroom. I place it third because its network-port count and small chassis are useful, but its capacity and expansion limits make it the narrowest rack recommendation.
Pros:- Eight-core Intel Atom C2750 has a listed TDP of up to 20W.
- Four RJ45 LAN ports suit multi-interface network roles.
- Supports ECC DDR3 SO-DIMM memory and multiple SATA connections.
- Compact 1U chassis weighs 8 pounds.
Cons:- Memory support is limited to 32GB.
- The Atom C2750, DDR3 memory, and PCIe 2.0 interface make this the least forward-looking platform here.
- Barebone configuration may require additional components before operation.
Best for: A technically capable buyer building a low-power 1U network appliance, lightweight service host, or compact lab node that benefits from four LAN ports.
Not ideal for: Virtualization-heavy deployments, memory-intensive applications, buyers seeking current-generation expansion, or anyone expecting a complete server without sourcing additional parts.
- Processor:Intel Atom C2750, eight cores, up to 20W TDP
- Memory:Four DDR3-1600/1333 ECC SO-DIMM slots; up to 32GB
- Expansion:One PCIe 2.0 x8 slot via riser
- SATA:2 × SATA 3 and 4 × SATA 2
- Networking:Four RJ45 LAN ports
- USB:4 × USB 3.0 and 2 × USB 2.0
- Form factor:1U rackmount
- Dimensions and weight:9.8 × 17.2 × 1.7 in; 8 lb
Our verdict“I would select the SYS-5018A-TN4 only for a modest, low-power rack role where four LAN ports and a compact chassis matter more than memory capacity or newer expansion.”
Lenovo ThinkSystem ST50 Tower Server Bundle with APC BR1500MS UPS, Intel Xeon E-2124G, 32GB RAM, 6TB Storage (Renewed)
The Lenovo ThinkSystem ST50 bundle is the outlier in this roundup: it is a mini-tower rather than a rack server or rack barebone. That can be an advantage for a small office without a rack, especially because the package includes an APC BR1500MS UPS alongside the server. The listed Xeon E-2124G, 32GB of DDR4 memory, and three 2TB SATA hard drives give it a different starting point from the SSD-equipped HPE: this bundle emphasizes bulk HDD storage and power backup rather than rack density, hot-swap expansion, or enterprise remote management.
Its four-core Xeon reaches up to 4.5GHz Turbo according to the supplied specification, which suits straightforward office services better than the Supermicro’s older Atom platform when per-core responsiveness is a priority. The 6TB of stated drive capacity is also more immediately substantial than the HPE’s two included 960GB SSDs, though the drive arrangements and workload characteristics differ. The bundled UPS can help keep a small installation powered through short interruptions and protect against some electrical events; it does not change the fact that the server has a single power supply.
The bundle needs careful inspection before purchase. The description says the memory and drive upgrades require installation, despite listing 32GB and 6TB, so the buyer should confirm exactly what arrives installed and what must be fitted. Its three 3.5-inch bays, single 1GbE port, renewed condition, and 90-day limited warranty are less compelling for a rack-based business deployment than the HPE’s eight SFF bays, dual power supplies, and iLO management. I rank it fourth overall because it is useful for a particular small-office tower setup, not because it matches the other products as a rack bare-metal server.
Pros:- Includes an APC 1500VA UPS with battery backup and surge protection.
- Lists 32GB DDR4 memory and three 2TB SATA HDDs for 6TB total storage.
- Xeon E-2124G has four cores and a stated Turbo frequency up to 4.5GHz.
- Tower form factor can suit an office without rack infrastructure.
Cons:- The memory and drive upgrades require installation, so buyers should verify the delivered configuration.
- Renewed condition comes with a 90-day limited warranty.
- One power supply and one 1GbE port limit resilience and connectivity.
Best for: A small office or home business that needs a non-rack tower, sizable HDD capacity, and an included UPS, and can handle installation checks and work.
Not ideal for: Rack deployments, buyers who need redundant server power, high-speed networking, a longer stated warranty, or guaranteed out-of-box installation of the listed upgrades.
- Form factor:Mini tower
- Processor:Intel Xeon E-2124G, four cores, 3.4GHz; up to 4.5GHz Turbo
- Memory:32GB DDR4 2666MHz, with upgrade installation required
- Storage:3 × 2TB SATA HDDs; 6TB listed total
- Drive bays:Three 3.5-inch bays
- Networking:1 × 1GbE
- UPS:APC Back-UPS Pro BR1500MS, 1500VA
- Condition and warranty:Renewed; 90-day limited warranty
Our verdict“I would choose the ST50 bundle for a small office that specifically wants a tower with a UPS and HDD capacity, but not as my first choice for a rack-based or growth-focused server deployment.”
How We Picked
I ranked these servers around the decisions that matter when buying physical hardware for a workload: what arrives in the box, what can be expanded, and what operating risks or setup work remain. A bare-metal server is not just a processor in a chassis. Memory type and capacity, storage layout, management access, power resilience, and network connectivity shape whether a system can serve as a dependable host, storage node, lab machine, or small-office server.
I gave the HPE the top position because it is the most complete enterprise-style configuration in this group. Its ECC memory, included SSDs, RAID controller, two power supplies, and iLO 6 reduce the number of foundational parts a buyer must source separately. I still count its two-drive starting point and four 1GbE ports as real limitations. It is not a substitute for a faster network adapter or a fully populated chassis.
The ASRock ranks second because it offers a stronger build-your-own path than the older Supermicro: Ryzen 5000 compatibility, a PCIe 4.0 x16 slot, four hot-swap 3.5-inch bays, and dedicated IPMI give a technically capable buyer useful choices. That flexibility comes with component selection and assembly work, and the single expansion slot and 400W power supply narrow some configurations. The Supermicro follows as a more specialized low-power barebone with four LAN ports, but its Atom C2750, older DDR3 platform, and 32GB cap make it less suitable for growing workloads.
I placed the Lenovo fourth overall, not because a tower cannot be useful, but because it serves a different buying situation: a renewed small-business server bundle with a UPS and hard-drive storage rather than a rack-first, upgrade-ready platform. Its quad-core Xeon and 1GbE connection are modest beside the HPE, while the supplied upgrades need installation and the listed warranty is short. I treat each product description as the basis for comparison and do not assume unlisted parts, performance results, or accessories.
| bare metal server | Processor |
|---|---|
| HPE ProLiant DL380 Gen11 Rack | Intel Xeon Silver 4410Y, 12 cores, 2.0 GHz |
| ASRock Rack 1U4LW-X570 1U Rack | — |
| Supermicro SYS-5018A-TN4 1U Ra | Intel Atom C2750, eight cores, up to 20W TDP |
| Lenovo ThinkSystem ST50 Tower | Intel Xeon E-2124G, four cores, 3.4GHz; up to 4.5GHz Turbo |
Factors to Consider When Choosing Bare Metal Servers
I would choose among these systems by starting with the workload and physical environment, then checking what the listing actually supplies. A server that looks capable on paper can still require memory, storage, or installation work before it is usable.
Match the chassis to the room and rack
The HPE DL380 Gen11 and both barebone Supermicro and ASRock systems are rackmount designs, while the Lenovo is a mini tower. Rackmount equipment makes sense when you already have a rack, suitable rails or shelves, and a plan for airflow and noise. The HPE is 2U and weighs 57.3 pounds, so allow for its size and safe installation. The two 1U barebones use less rack height, but their compact format does not mean they include everything needed to build a working server.
If the server will sit in an office or home workspace without rack infrastructure, the Lenovo tower avoids the rack requirement and adds a UPS. That convenience comes with a less expandable-looking role in this lineup: one listed network port, three drive bays, and a single power supply. I would not choose a chassis only because it is smaller; check the cooling, maintenance access, and future card or drive needs as well.
Separate ready-to-run configurations from barebones
A configured server reduces parts selection and assembly work. The HPE includes CPU, 64GB ECC memory, two SSDs, and RAID, making it the clearest starting point for a business deployment. By contrast, the ASRock and Supermicro are explicitly barebone systems. Buyers should verify the exact supplied parts and budget time to select compatible processors, memory, storage, and any operating-system or rack accessories not listed.
The Lenovo bundle lists memory and storage but says those upgrades require installation. I would treat that distinction as a delivery and setup question, not assume everything is fitted and ready. Ask what is installed, what is shipped separately, and whether the system boots in the advertised configuration. This check matters especially when the server must be brought into service on a fixed schedule.
Plan memory and processor headroom
For virtual machines, databases, and concurrent services, memory capacity can become a limit before the CPU does. The HPE’s 64GB ECC starting configuration gives it a clear advantage over the 32GB maximum on the Supermicro. The ASRock offers four DDR4 UDIMM slots and Ryzen 5000 compatibility, but the buyer must choose and install the parts; confirm the exact supported memory configuration for the processor and board before ordering components.
The Lenovo’s four-core Xeon E-2124G and 32GB listing suit simpler workloads more naturally than dense virtualization. The Supermicro’s eight-core count should not be read as proof of higher overall capacity: its Atom C2750 platform, low listed TDP, DDR3 memory, and 32GB ceiling point toward lighter always-on duties. Match server selection to the application, concurrent users, and expected growth rather than comparing core counts alone.
Compare storage capacity, drive types, and serviceability
The HPE arrives with two 960GB SATA SSDs and has eight SFF hot-plug bays, leaving room for expansion while requiring buyers to add drives for a larger array. The ASRock offers a different mix: four hot-swap 3.5-inch bays and three fixed 2.5-inch bays, useful for builders who want to combine larger drives and smaller devices. The Supermicro lists six SATA connections across SATA 3 and SATA 2, but check the physical drive support and included accessories for a specific build.
The Lenovo’s three 2TB HDDs provide 6TB of stated storage, but the bundle describes JBOD RAID and says the upgrades need installation. HDD capacity is not interchangeable with SSD responsiveness, and JBOD is not the same as a protected array. If a server will hold important data, decide how you will handle redundancy, backups, drive replacement, and recovery before treating raw capacity as usable protection.
Treat networking and remote administration as workload features
For a server that moves files, hosts virtual machines, or connects to several networks, network speed and port count can shape everyday performance. The HPE has four integrated 1GbE ports, while the ASRock has two 1GbE ports and the Lenovo lists one. The Supermicro’s four LAN ports may suit a compact network appliance, but port count alone does not establish the link speed or replace a check of the intended switch and network design.
Remote administration also differs. HPE iLO 6 and the ASRock’s dedicated IPMI are useful when the server will be tucked into a rack or managed without a local display. The supplied information does not list equivalent dedicated management for the Lenovo or Supermicro, so I would not assume it exists. If remote console access or out-of-band recovery matters, confirm the exact management features and licensing before choosing.
Check resilience, warranty, and support expectations
The HPE is the only option here with two listed power supplies, a meaningful distinction for a service that should remain available if one supply fails. The Lenovo includes a UPS, which helps with external power interruptions, but its single server power supply is not redundant. The ASRock’s 400W supply is listed as a single unit, and no redundant supply is specified for the Supermicro. A UPS and redundant server power solve different problems; neither replaces a tested backup and recovery plan.
Warranty terms also affect the purchase. The ASRock lists a three-year warranty, while the renewed Lenovo specifies a 90-day limited warranty. No warranty duration is supplied here for the HPE or Supermicro, so check the seller and manufacturer terms rather than infer coverage. For business-critical use, verify service availability, replacement parts, return conditions, and the support path before relying on a listing alone.
Frequently Asked Questions
Which of these bare metal servers is the best general-purpose business choice?
I would start with the HPE ProLiant DL380 Gen11 for general business use because it includes a 12-core Xeon Silver, 64GB ECC memory, two SSDs, RAID, iLO 6, and redundant power supplies. It is the most complete rack configuration in this group. Its four 1GbE ports and two included drives may still call for upgrades, so match the networking and storage to the workload before deployment.
Which option is best for a buyer who wants to assemble a custom server?
The ASRock Rack 1U4LW-X570 is the strongest custom-build choice here for a buyer comfortable selecting components. It supports Ryzen 5000 processors, ECC or non-ECC DDR4 UDIMMs, and a mix of hot-swap 3.5-inch and fixed 2.5-inch drive bays, with dedicated IPMI. It is not a complete server as supplied, and its one PCIe slot and single listed 400W power supply should inform the build plan.
Is the Supermicro SYS-5018A-TN4 suitable for virtualization?
It may suit a small lab or a few light services, but I would not choose it for memory-heavy or growth-focused virtualization. Its eight-core Atom C2750 and four LAN ports can fit modest always-on tasks, yet the 32GB ECC memory ceiling is restrictive beside the HPE’s 64GB included and much higher stated maximum. Its older DDR3 platform and PCIe 2.0 x8 expansion also narrow upgrade options.
Does the Lenovo ST50 bundle arrive ready to deploy?
I would confirm that with the seller before ordering. The listing specifies 32GB memory and three 2TB HDDs, but also says the memory and drive upgrades require installation. Clarify which parts are installed, whether the operating system is configured as expected, and what setup work remains. The included APC UPS is useful, but it does not remove the need to check the renewed server’s condition and its 90-day limited warranty.
Does an included UPS make the Lenovo more resilient than the HPE?
Not in every sense. The Lenovo’s APC UPS can provide battery backup and surge protection for external power events, while the HPE’s dual power supplies provide redundancy within the server if one supply fails. Those features address different risks. A robust setup may need both forms of protection, plus reliable backups and a tested recovery process; neither product description alone establishes a complete resilience plan.
Conclusion
My recommendation depends on where the server will run and how much setup work you want to own. For a business rack, virtualization host, or file server, I would choose the HPE DL380 Gen11 first: it has the strongest ready-to-use foundation, iLO management, and redundant power, although faster networking and additional drives may be needed. For a custom 1U build, the ASRock Rack is the more flexible pick if you are comfortable sourcing compatible components and can work within one PCIe slot.
Choose the Supermicro for a modest, low-power network or lab role where four LAN ports and a compact chassis matter more than memory growth. Pick the Lenovo ST50 when you need a tower rather than a rack server and value the included UPS and listed HDD capacity; verify installation details and accept the short renewed-product warranty. If neither the physical format nor the included configuration fits your workload, I would keep comparing rather than treating these four as interchangeable bare metal servers.
