Refurbished Dell PowerEdge R640 Servers

The Dell PowerEdge R640 is a strong and flexible 1U server that can handle any workload you throw at it. With its high performance, reliability, and scalability, consider it the perfect choice for businesses looking to optimize their data center operations.

Whether you need a custom configuration or replacement part for your current system, we carry a broad array of Used Dell R640 server hardware. At Alta Tech, our technicians are highly trained in all things Dell, so you can always feel confident in the reliability of our equipment.

Contact us today to get a quote on a system or custom configure your Dell server online in minutes. We also buy your excess used Dell servers for cash or trade-in, call and ask for our Dell Product Managers at 800-546-2582.

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Refurbished Dell R640 Information

PowerEdge tower servers are designed to meet the demands of today's office by delivering quiet, concentrated processing in a small footprint. Tower servers are simple to set up, maintain, and automate.

The Dell PowerEdge R640 Server is a 1U server, ideal for most data centers to provide scalable computing and storage featuring a 2-socket platform that ideally combines performance, cost, and density.

A dual-socket platform is ideal for scale-out computing and a storage-dense data center. With Dell PowerEdge R640 Server, you can enjoy the flexibility of 2.5” or 3.5” drives, the performance of NVMe, and embedded intelligence to optimize application performance - all in a secure platform. The R640 Server also provides embedded diagnostics and SupportAssist, delivering maximum uptime without any hassle.

For dense scale-out data center computing and storage, the PowerEdge R640 is the appropriate dual-socket platform. To ensure optimized application performance in a secure platform, take use of the flexibility of 2.5" or 3.5" disks, the optimizing performance of NVMe, and integrated intelligence.

Dell's PowerEdge R640 server platform is a dual-socket server architecture designed for dense software-defined storage, application tier service providers, dense private cloud, virtualization, and high-performance computing (HPC). The PowerEdge R640 was released in 2017 and stood out for being well suited for a variety of users.

The PowerEdge R640 system supports up to two AC or DC power supply units (PSUs). NOTE If system with 1100 W AC or HVDC PSU operates from 100 to 120V, the power rating per PSU is derated to 1050 W. NOTE If system with 1600 W PSUs operates from 100 to 120 V, then the power rating per PSU is derated to 800 W.

The iDRAC is a piece of hardware that sits on the server motherboard and allows System Administrators to upgrade and administer Dell servers even when they are switched off. Administrators can also execute remote management operations using the iDRAC's web interface and command line interface.

Ideal workloads

Dense software-defined storage
Service providers: application tier
Dense private cloud
Virtualization
HPC

DELL 1U SERVER MODELS

Dell R640 Server Specifications

The Dell EMC PowerEdge R640 is one of the 14th generation lines of Dell Inc. servers. It is designed to enable 4x more VMs per server and reduce the total ownership cost by up to 70%. The dell r640 specs make it particularly versatile and well suited for different users. This is primarily because of its 1U form factor. It also supports Intel Xeon scalable processors, which allow for a 27% increase in processing core. Likewise, the optional NVMe and NVDIMMs hard drives allow for optimized application performance by reducing latency.

In terms of processor memory, the Dell EMC PowerEdge R640 allows for flexible configuration, supporting up to 24 RDIMM or LRDIMM. It supports up to 1.5TB, making it perfect for in-memory processes like Hadoop. Additionally, the server can support up to 12 NVDIMM to ensure optimized application performance, maximize storage performance, and create a worry free environment. However, two processors and 12 RDIMM (16GB, 32GB, or 64GB) must be added to augment the NVDIMM. You should bear in mind that the 8GB RDIMM is not compatible with NVDIMM.

The PowerEdge R640 server has a system-erase technology that keeps data safe while allowing the administrator to clear the data from the server efficiently and quickly.

Conclusively, the R640 Dell server has excellent specifications that make it ideal for most data centers. The Intel Xeon scalable processors, NVDIMM, and NVMe drives have impressive specifications that maximize application performance. This makes the PowerEdge R640 server robust to handle even the most demanding computing processes.

You can also read the Dell R640 technical guide if you want to go more into detail about the Dell PowerEdge R640 specs.

However, if you are looking for something more powerful or something cheaper, we have a wide variety of other Dell PowerEdge servers you can check out. You can compare products and go with the one that will suit your specific needs.

Specification Table

Server Type: 1U Rackmount Server

Processors: 2 x Intel Xeon Scalable Processor Family with 38.5MB cache & 26 cores per processor operating system.

Memory: 24 DIMM Slots (Fully expandable up to 7.68TB DDR4 2933 MT/s RDIMM and LRDIMM)

Drives: 4 Drive Slots (Up to 8x 2.5" & 10x 2.5" SAS/SATA HDD/SSD Drives)

I/O Slots: 3 PCIe card slots plus a dedicated PERC slot and dedicated iDRAC network port.

Remote Access Card: iDRAC8 or iDRAC9 with Lifecycle Controller

Internal Storage: 8x 2.5" - Up to 16TB (NL-SAS/SATA) / 19.2TB (SAS) / 30.72TB (SSD), 10x 2.5" - Up to 20TB (NL-SAS/SATA) / 24TB (SAS) / 38.4TB (SSD)

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About Our Used Dell R640 1U Servers

Looking for high‑performance, cost‑efficient server hardware? The refurbished Dell PowerEdge R640 is one of the most trusted workhorses for IT managers, resellers, MSPs, and data centers. At Alta Technologies, we offer professionally refurbished used Dell PowerEdge R640 machines. These machines undergo our multi-point inspection process, are cleaned & tested in climate-controlled environments, and are backed by an Alta warranty. If you need computing density, flexibility, and excellent value without OEM price tags, our used Dell R640 systems deliver performance you can trust, with savings often ranging from 30% to 80% off the new price.

Key Features of the Used Dell PowerEdge R640 Server

1U Form Factor with Dense Compute Power

Designed for environments where space and performance must go hand in hand, the used Dell PowerEdge R640 delivers robust capabilities in a compact 1U chassis. It’s ideal for high-density deployments, virtualized clusters, or compute-heavy workloads where rack space is at a premium.

Dual Intel Xeon Scalable CPU Support

With support for up to two Intel Xeon Scalable processors (1st or 2nd Gen), the refurbished Dell R640 can provide up to 28 cores per CPU in many configurations. Alta’s in-house testing process ensures these CPUs deliver reliable multi-threaded performance for virtualization, containerization, and application servers.

High-Speed Memory Scalability

The used PowerEdge R640 supports up to 24 DIMM slots (12 per CPU) with RDIMM or LRDIMM modules and offers configurations with Intel Optane Persistent Memory in compatible units. Depending on the model and DIMM type, memory capacity ranges from 1.5TB to beyond, making it ideal for memory-intensive workloads such as database caching or large-scale analytics.

Actual specifications vary per unit; please request a quote for a detailed configuration.

What to Look for When Buying a Used Dell R640

Choose the Right CPU for Your Workload

Processor selection affects performance and licensing. For VMs or multi-threaded applications, consider CPUs with a higher core count (e.g., 20–28 cores). For SQL, SAP, or compute-intensive tasks, clock speed may be more critical. Let Alta help align specs to workload demand.

How Much RAM Do You Really Need?

Many organizations overestimate RAM. If you’re running dozens of VMs, go big (256 GB or more). For file servers or lighter application workloads, 64–128GB is often sufficient. The refurbished R640 offers upgrade flexibility, with unused DIMM slots available in many units.

Storage Type Breakdown

SAS: Good for performance & reliability.
SATA: Cost-effective, large capacity.
NVMe: Exceptional IOPS & latency for high-speed needs.

Some used Dell R640 chassis are NVMe-ready, while others support only SAS/SATA. Confirm the backplane type and controller compatibility before purchasing, or let Alta customize the unit for you.

Why Buy Used PowerEdge R640 from Alta Technologies?

Professionally refurbished by Alta Technologies, never outsourced.
All units undergo a multi-point inspection, comprehensive diagnostic testing, and thorough deep cleaning.
Backed by an Alta warranty, not the OEM.
Custom configurations are available for RAM, CPU, storage, NICs, and RAID.
30+ years in the industry, with global clients from Fortune 500s to data centers.
Inventory in stock and ready to ship. Bulk discounts available.
Sustainability-focused: extend hardware life and reduce e-waste.
We can ship a single unit, or build up hundreds of custom R640 systems for you, with FAST delivery and shipping.

Used Dell R640 Technical Specifications

Below is a breakdown of technical options available across Alta’s inventory of refurbished PowerEdge R640 servers:

Specification	Details
Form Factor	1U rackmount
CPU Support	Dual Intel Xeon Scalable (up to 28 cores per CPU)
Memory	24 DIMM slots; up to 1.5TB+ using RDIMM/LRDIMM; Intel Optane supported in select units
Storage	SAS, SATA, NVMe (varies by chassis); 2.5" or 3.5" bays
Drive Bays	Up to 10 × 2.5" or 4 × 3.5", depending on chassis
RAID/Controllers	PERC H730P, H740P, or HBA options
Remote Management	iDRAC9 with Lifecycle Controller (Enterprise or Basic license options)
Power Supply	Dual redundant PSUs (e.g., 550W, 750W, 1100W)
Typical Use Cases	Virtualization, private cloud, VDI, HPC, application hosting, edge compute