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1U Rack Servers

Refurbished 1U rack servers — maximum compute per rack unit for virtualization clusters, web farms, and colocation racks, built to your CPU, memory, and drive spec.

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Most popular 1U rack servers

Ready from: complete units in stock. Chassis from: the base price before you choose CPUs, memory and storage.

  • 1-year warranty, 90-day returnsParts, labor and shipping; up to 5 years
  • Tested in MichiganAssembled and tested before shipping
  • Free shipping in the lower 48Most builds ship in 1–2 business days
ModelSpecsBest forReady fromChassis from
Dell PowerEdgeR640 14th gen · 1U Specs2× Xeon Scalable 1st/2nd gen24 DIMM slots · DDR4Up to 10 × 2.5″ or 4 × 3.5″ Best forDense virtualization, web and app servers Ready fromSee builds ›  Chassis fromSee chassis › 
HPE ProLiantDL360 Gen10 Gen10 · 1U Specs2× Xeon Scalable 1st/2nd gen24 DIMM slots · DDR4Up to 10 × 2.5″ or 4 × 3.5″ Best forDense 1U virtualization Ready fromSee builds ›  Chassis fromSee chassis › 
Dell PowerEdgeR630 13th gen · 1U Specs2× Xeon E5-2600 v3/v424 DIMM slots · DDR4Up to 10 × 2.5″ Best forLowest-cost 1U for labs and utility roles Ready fromSee builds ›  Chassis fromSee chassis › 
Lenovo ThinkSystemSR630 ThinkSystem V1 · 1U Specs2× Xeon Scalable 1st/2nd gen24 DIMM slots · DDR4Up to 10 × 2.5″ or 4 × 3.5″ Best forDense 1U virtualization Ready fromSee builds ›  Chassis fromSee chassis › 
HPE ProLiantDL360 Gen11 Gen11 · 1U Specs2× 4th/5th Gen Xeon Scalable32 DIMM slots · DDR5Up to 10 × 2.5″ or 4 × 3.5″ Best for1U for general compute, databases and VDI Ready from—  Chassis fromSee chassis › 
Dell PowerEdgeR440 14th gen · 1U Specs2× Xeon Scalable 1st/2nd gen16 DIMM slots · DDR4Up to 10 × 2.5″ or 4 × 3.5″ Best forValue 1U for general infrastructure Ready fromSee builds ›  Chassis fromSee chassis › 
HPE ProLiantDL360 Gen9 Gen9 · 1U Specs2× Xeon E5-2600 v3/v424 DIMM slots · DDR4Up to 10 × 2.5″ or 4 × 3.5″ Best forDense 1U for general-purpose compute Ready fromSee builds ›  Chassis fromSee chassis › 
Dell PowerEdgeR650 15th gen · 1U Specs2× 3rd Gen Xeon Scalable32 DIMM slots · DDR4Up to 10 × 2.5″ or 4 × 3.5″ Best forNewer 1U platform with PCIe 4.0 Ready fromSee builds ›  Chassis fromSee chassis › 
Dell PowerEdgeR340 14th gen · 1U Specs1× Xeon E-2100/E-22004 DIMM slots · DDR4Up to 8 × 2.5″ or 4 × 3.5″ Best forEntry 1-socket 1U for branch offices Ready from—  Chassis fromSee chassis › 
Dell PowerEdgeR6525 15th gen · 1U Specs2× AMD EPYC 7002/700332 DIMM slots · DDR4Up to 10 × 2.5″ or 4 × 3.5″ Best forHigh core count per rack unit Ready fromSee builds ›  Chassis fromSee chassis › 
Not sure which model fits? Send us your requirements.Request a quote
Price on request

More models, configured to your spec

By generation, newest first. Open a model to pick a chassis and configure it, or send us the spec and we reply with a quote.

Dell 16th gen
HPE Gen11
Dell 15th gen
HPE Gen10 Plus
Dell 14th gen
HPE Gen10

All 1U rack servers

Every listing in this category: units in stock, configurators and quote-only models

Refurbished 1U rack servers — maximum compute in minimum rack space. One rack unit (1.75″) tall, these are the workhorses of virtualization clusters, web farms, and colocation racks: Dell PowerEdge R630, R640, R650, R660, HPE ProLiant DL360, single-socket AMD EPYC platforms, and more — custom-configured, tested, and warrantied.

Shop 1U servers by model

Dell PowerEdge 1U

HPE ProLiant 1U

Why choose a 1U server?

Rack space costs money — colocation is billed by the U. A 1U server delivers two full CPU sockets, terabytes of RAM, and 8–10 NVMe/SAS/SATA bays in the smallest standard footprint. Stack a full 42U cabinet and you get over 40 dual-socket nodes. The trade-off vs 2U servers: fewer drive bays and PCIe slots, and smaller (louder) fans — which is why 1U is the data-center pick, not the office pick (for quiet office servers, see tower servers).

Every PCSP 1U server is custom-configured to your spec, fully tested, backed by a 1-year warranty (extendable to 5), and ships fast from the US.

A 1U chassis gives you eight to ten small-form-factor bays depending on the model, and that ceiling decides the array as much as the workload does. What is a RAID array? shows the minimum drive count for each level, so you can tell before ordering whether RAID 10 fits in the bays you have.

Not every 1U lives in a datacenter. A single-socket or older dual-socket 1U in a store back room, clinic or branch closet is an edge server, and for most such sites remote management matters more than ruggedized hardware. What is an edge server? explains when a standard 1U is enough and when the site calls for purpose-built gear.

Frequently Asked Questions

What is a 1U rack server?

A 1U server occupies one rack unit — 1.75 inches (44.45 mm) of vertical space in a standard 19-inch rack. It is the densest standard server form factor: dual CPUs, up to a few terabytes of RAM, and 8–10 drive bays in a single U.

What is the most popular 1U server?

The Dell PowerEdge R640 and HPE ProLiant DL360 Gen10 are the most-deployed refurbished 1U servers — dual Xeon Scalable CPUs, large DDR4 capacity, and proven reliability at a fraction of new pricing.

When should I pick 1U over 2U?

Pick 1U when rack space is the constraint and your storage is external (SAN/NAS/cloud) — virtualization hosts, web and application tiers, HPC nodes. Pick 2U when you need many local drives, GPUs, or extra PCIe expansion.

How deep and loud are 1U servers?

Most 1U servers are 27–31 inches deep and use small high-RPM fans, so they are designed for server rooms, not offices. If noise matters, choose a tower server or a 2U platform with larger fans.

Can I configure a 1U server that is out of stock?

Yes. Any 1U server not currently in stock is available to configure by quote — we will build it to your CPU, RAM, and storage spec and price it.

Build your own 1U configuration online, or request a quote for a custom spec.

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