What are the alternatives to the Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory…?

Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory… competes with other NAS & Home Servers products on SpecPicks. Use our Compare tool to view specs side-by-side, or browse the full NAS & Home Servers category for alternatives.

Synology

RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 320TB HDD Storage, 2 x 10GbE LAN Ports, Redundant Power, DSM Operating System Bundle with Rail kit

Name: Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 320TB HDD Storage, 2 x 10GbE LAN Ports, Redundant Power, DSM Operating
Brand: Synology
SKU: B0FV97DL53
Price: 15399.00 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-22

$15399.00

Buy on Amazon — $15399.00 Compare to similar nas & home servers

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.

Bottom line: The RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 320TB HDD Storage, 2 x 10GbE LAN Ports, Redundant Power, DSM Operating System Bundle with Rail kit is a niche pick — read recent reviews before buying in the nas & home servers category, priced around $15399.00. Read recent reviews carefully before committing.

Form Factor: NAS Rack ServerInternal File System Format: EXT4, BtrfsPorts: 4 x RJ-45 1GbE and 2 x RJ-45 10GbE LAN Ports (both with Link Aggregation/ Failover support); 2 x USB 3.2 Ports; 2 x Expansion Ports; Btrfs File System for Advanced LUN iSCSI ServiceProcessor: Xeon D-1541 8-Core 2.1GHz CPUMemory: 64GB DDR4 ECC UDIMMStorage: 320TB (16 x 20TB) SATA 3.5" HDDs for High-Capacity StoragePower: Redundant Power SupplyOperating System: Synology DSM SoftwareProvides reliable and safe data security and lightning-fast performance. Supports large multi-user environments while handling data…

SpecPicks Verdict

SpecPicks classifies Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB… as a niche pick — read recent reviews before buying in the nas & home servers category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Synology's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

Common buyer scenarios for nas & home servers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Hard drives and memory upgrades included separately not installed, installation required.
✓ Backed by Synology's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

Xeon D-1541 8-Core 2.1GHz CPU, Up To 2.7GHz Turbo; 64GB DDR4 ECC UDIMM Memory; 320TB (16 x 20TB) SATA 3.5" HDDs for High-Capacity Storage
Securing Your Business Assets: The Synology RS4021xs+ is a 16-bay NAS that prioritizes data security and delivers lightning-fast performance, boasting over 234K 4K random read IOPS and 6,258 MB/s sequential read throughput. With an 8-core Xeon processor, ECC memory, advanced snapshot technology, and built-in dual-port 10GbE connectivity, it ensures robust data security and efficient handling of data-intensive workloads in large multi-user environments.
Engineered for Service Continuity: The RS4021xs+ is designed to ensure mission-critical data availability, even in the face of disasters. With redundant power supplies, hot-swappable fans, and Synology High Availability (SHA) for active-passive clustering with minute-level failover, businesses can maintain uninterrupted operations and maximize service availability.
Storage for Virtualization: Synology iSCSI storage seamlessly integrates with mainstream virtualization solutions such as vSphere, Hyper-V, XenServer, and Cinder. With features like vSphere 6.5 and VAAI integration, Windows Offloaded Data Transfer (ODX), and Synology Storage Console, the NAS enhances usability and simplifies storage provisioning and management in virtualized environments.
Hard drives and memory upgrades included separately not installed, installation required.

Full Specifications

Size	d) 320TB HDD Storage
Brand	Synology
Color	Black
Turbo	Yes
Material	Metal
Unit Count	16.0 Count
Model Number	RS4021xs+
Mounting Type	Rack Mount
Compatible Devices	Server
Enclosure Material	Metal
Is Assembly Required	Yes
Warranty Description	Manufacturer

Ready to buy?

Synology RackStation RS4021xs+ NAS Server with Xeon 2.1GHz CPU, 64GB Memory, 320TB HDD Storage, 2 x 10GbE LAN Ports, Redundant Power, DSM Operating System Bundle with Rail kit is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.