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Dell PowerEdge MX840c CTO Compute Sled

CTO Servers
ECS Refurbished & Tested


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Server Chassis


Intel Xeon Platinum

Supports up to (4) processors

Intel Xeon Gold

Supports up to (4) processors


12 DIMMs per processor (up to 48 DIMMs in a 4-processor configuration)

RAID Controllers (Optional)

If you plan to connect this Compute Sled to a storage sled in the MX7000. You must select the H745p MX or the HBA330 MX to access those drives.
If you want to have multiple Compute Sleds to have access to the same Storage Sled. You Must select HBA330 MX controller.

Boot Option | Boot Optimized Storage Subsystem (BOSS) (Optional)

Supports up to 2 M.2 SSD's
The PowerEdge MX750c supports either the optional IDSDM or the BOSS S-1 module but cannot support both simultaneously.
You must Select the BOSS Card as well if you choose this option.

Boot Option | Internal Dual SD Module (IDSDM) (Optional)

Supports up to 2 microSD, The second microSD is for redundancy
The PowerEdge MX750c supports either the optional IDSDM or the BOSS S-1 module but cannot support both simultaneously.
You must Select the IDSDM Card as well if you choose this option.

Mezzanine Card for Fabric A

Please Select 2 Identical Items

Mezzanine Card for Fabric B

Please Select 2 Identical Items

Mini-Mezzanine Card for Fabric C (Optional)

If you choose a PERC controller, this Fabric C will be used and you will not need to select one here.
Otherwise, Please Select 2 Identical Items

Select Drive | HDD SATA (Optional)

Select Drive | HDD SAS (Optional)

Select Drive | SSD SATA (Optional)

Select Drive | SSD SAS (Optional)

Select Drive | NVMe SSD PCIe Gen 3 (Optional)

iDRAC Remote Options (Optional)

Default Dell IDRAC9 Express License

Trusted Platform Module (TPM) (Optional)

ECS Warranty

Helpful Tip: Once desired configuration is selected click "Add to Cart". From the cart page you can submit a submit a quote request for best pricing

Dell PowerEdge MX840c CTO Compute Sled

The PowerEdge MX840c is a powerful four-socket, full-height, double-width server that features dense compute, exceptionally large memory capacity, and a highly expandable storage subsystem. It is the ultimate scale-up server that excels at running a wide range of database applications, substantial virtualization, and software-defined storage environments. The MX7000 chassis supports up to four MX840c compute sleds.

Key features of the MX840c include:

  • Dual-width slot design
  • 4 CPU sockets
  • 48 DIMM slots of DDR4 memory
  • Boot options include BOSS-S1 or IDSDM
  • Up to 8 SAS/SATA SSD/HDD and NVMe PCIe SSDs
  • Four PCIe mezzanine card slots for connecting to network Fabric A and B
  • Two PCIe mini-mezzanine card slots for connecting to storage Fabric C
  • iDRAC9 with Lifecycle Controller

Powerful and flexible, four-socket double-width compute sled powered by up to four 28-core 2nd Generation Intel Xeon Scalable processors. PowerEdge MX840c features a large memory footprint with up to 48 DDR4 DIMMs slots. It supports up to eight 2.5-inch SAS/SATA (HDD/SDD) or Express Flash NVMe PCIe SSD drives. The PowerEdge MX7000 chassis supports up to four MX840c servers.

  • Exceptionally broad memory configuration capacities of up to 3TB (RDIMM) or 6.1TB (LRDIMM); support up to 192GB NVDIMM for large in-memory applications
  • Supports up to 24 slots for Intel OptaneTM DC persistent memory DCPMM (12.2TB) with a maximum total capacity of 15.36TB per server
  • Choice of optional M.2 Boot Optimized Storage Solution (BOSS) or Internal Dual microSD Module (IDSDM), to streamline operating system and data storage
  • Option of Express Flash NVMe PCIe SSD for high performing direct attached storage requirements

Dell PowerEdge MX Series

Simplify management and intelligently automate

All PowerEdge server feature the embedded, agent-free integrated Dell Remote Access Controller (iDRAC) 9 with Lifecycle Controller (LC) to simplify server systems management. Dell EMC OpenManage Enterprise – Modular Edition (OME-Modular) provides comprehensive in-system management within the PowerEdge MX7000 server chassis. Delivering key abilities of OpenManage Enterprise systems management, OME-Modular unified web/RESTful API interface manages the entire PowerEdge MX environment, including computer, storage and networking.

  • Deploy, monitor, manage, configure, update, troubleshoot and remediate Dell EMC servers from any location, regardless of operating system or hypervisor presence or state.
  • Speed systems management performance with enhanced iDRAC9 processor, up to four times better performance over the prior generation.

Set the foundation for the modern data center

Designed for Dell EMC’s PowerEdge MX kinetic infrastructure ecosystem, the PowerEdge MX840c server, with dense compute, exceptionally large memory capacity and highly expandable storage subsystem, delivers the flexibility and agility needed in today’s demanding, shared-resource environments.

  • Double-width; up to four sleds per PowerEdge MX7000 chassis.
  • Two or four, up to 28-core second-generation IntelXeonScalable processors per sled, up to 448 cores per chassis.
  • Up to 48 DDR4 DIMMs slots, 6 TB max memory and speeds up to 2933MT/s; up to 192 DIMMS per chassis for up to 24.5TB max memory.
  • Supports up to 24 DIMM slots for IntelOptane DC persistent memory DCPMM (12.2TB) with a maximum total capacity of 15.36TB per server.
  • Up to 8x2.5" drive bays for SAS/SATA (HDD/SDD) and NVMe PCIe SSD support plus optional M.2 boot.

Dynamically configure for optimal workload performance and efficiency

PowerEdge MX architecture disaggregates and granularly reassigns resources, maximizing utilization, minimizing overprovisioning and stranded infrastructure. PowerEdge MX840c fully configurable, no compromise compute maximizes scalability to enhance workload performance and optimization.

  • Scale compute resources with second-generation Intel Xeon Scalable processors and tailor performance based on your unique workload requirements.
  • Flexible memory configurations from capacities of 8GB to 6TB; RDIMMs and LRDIMMs for reduced memory loading and greater density.
  • Large, high-performance onboard storage footprint with double the HDD drives per compute sled.

Product Information for Dell MX840c

Base Server Standard Capabilities

FeaturePowerEdge MX840c Technical Specifications
ProcessorTwo or four 2nd Generation Intel™ Xeon™ Scalable Processors, up to 28 cores per processor Intel® C628 Chipset with optional Intel® QuickAssist Technology
MemoryFront bays: 48 DIMM slots in total; supports DDR4 RDIMMs, LRDIMMs; up to 2933 MT/s speeds, 3TB maximum (RDIMM), 6TB maximum (LRDIMM)
Persistent Memory12 DIMM slots support NVDIMM-N; up to 2933 MT/s, 192GB maximum
Supports up to 24 slots for Intel® OptaneTM DC persistent memory PMem (12.2TB) with a maximum total capacity of 15.36TB per server
ControllersInternal controllers: S140 Software RAID, HBA330 Internal SAS HBA, PERC H730P Adapter, PERC H745P Adapter, HBA330 mini-mezzanine SAS HBA
Internal boot options: Choice of optional Boot Optimized Storage Solution (BOSS) (2 X M.2 SDDs) or
Internal Dual SD Module (IDSDM)
Drive BaysFront: Up to 8 x 2.5” SAS/SATA (HDD/SDD) or NVMe PCIe SSD
Power SuppliesMX7000 chassis: OpenManage Enterprise Modular Edition (OME-Modular); MX7000 chassis: up to 6 3000W; PSU and grid redundancy support
FansMX7000 chassis: 5 rear and 4 front-accessible hot-swap fans
Dimensions (LxWxD)610.39mm (24.03 inches) x 250.2mm (9.8 inches) x 85.5mm (3.37 inches)
Embedded mgmtMX7000 chassis: OpenManage Enterprise Modular Edition (OME-Modular); up to 2 redundant MX9002m management modules Unified control: single management point for server, storage and networking Intelligent automation: Operational template methodology and comprehensive RESTful API Quick Sync 2 Bluetooth Low Energy (BLE)/wireless module

On compute sled: As with every other PowerEdge server, the integrated Dell Remote Access Controller (iDRAC) 9
iDRAC Direct
iDRAC RESTful API with Redfish
OpenManage™ SWOpenManage EnterpriseOpenManage Mobile (OMM)
OpenManage Power Center (OMPC)
Integrations & ConnectionsIntegrations:
Microsoft® System Center
VMware® vCenter™
BMC Software (available from BMC)
Ansible by Red Hat
Nagios Core and Nagios XI
Oracle Enterprise Manager
Microfocus Operations Manager (OM) and
Operations Manager i (OMi)
IBM Tivoli Netcool/OMNIbus
SecurityTPM 1.2/2.0 (optional)
Cryptographically signed firmware
Silicon Root of Trust
Secure Boot
System Lockdown (requires iDRAC Enterprise or Datacenter)
System Erase
Embedded NIC 
Networking Options (NDC)MX7000 chassis Fabric options: up to 2 pair redundant general-purpose switch or pass-through modular bays (Fabrics A and B);
redundant pair of storage-specific switch bays (Fabric C) Up to 25Gbe, 32Gbps Fibre Channel, 12Gbps SAS
GPU Options 
Front Ports1 USB 3.0 port external port
Internal Ports1 x USB 3.0 internal port
VideoIntegrated VGA controller in iDRAC, VGA over LAN
  • 4 PCIe 3.0 x 16 mezzanine slots (Fabric A and B)
  • 2 PCIe 3.0 x 16 mini-mezzanine slots (Fabric C)
  • Canonical Ubuntu Server LTS
  • Citrix Hypervisor
  • Microsoft Windows Server with Hyper-V
  • Red Hat Enterprise Linux
  • SUSE Linux Enterprise Server
  • VMware ESXi/vSAN

Spec Sheet

Technical Guide

Shipping Information

Express Computer Systems can ship to virtually any address in the world and provides you with the best shipping rates possible. Cost of shipping varies depending on what service you require, your destination and size of the shipment. Shipping costs will be calculated separately from your order and billed to you post purchase. In the notes section of your order please provide us with your preferred shipping method and we will get back to you.

Custom configured orders ship within 2 business days after all required products are in stock.

Please allow 3 business days for products that are not in stock to arrive to our facility in Irvine, California.

Domestic Shipments

Standard Ground Shipping time: 2-7 business days
Order processing time: 0-3 business days
Delivery time after order is placed: 2-10 business days
Excludes weekends, holidays or weather delays.
3 Business Days Shipping time: 3 business days
Order processing time: 0-3 business days
Delivery time after order is placed: 3-6 business days
Excludes weekends, holidays or weather delays.
2 Business Days Shipping time: 2 business days
Order processing time: 0-3 business days
Delivery time after order is placed: 2-5 business days
Excludes weekends, holidays or weather delays.
Overnight / Next Business Day Shipping time: 1 business day
Order processing time: 0-3 business days
Delivery time after order is placed: 1-4 business days
Excludes weekends, holidays or weather delays.

International Shipments

International Economy Shipping time: 4-6 business days
Order processing time: 0-3 business days
Delivery time after order is placed: 5-9 business days
Excludes weekends, holidays or weather delays.
International Priority Shipping time: 1-3 business days
Order processing time: 0-3 business days
Delivery time after order is placed: 2-6 business days
Excludes weekends, holidays or weather delays.


For more information on shipping view our Shipping Information page or send us a message

ECS Warranty Information

Express Computer Systems (ECS) provides a 1 year parts warranty against defects in material or workmanship that will affect the products functionality. All refurbished items are tested prior to shipping to guarantee up-time upon arrival. If you are having issues with an item we provided please Contact Us and we will do our best to assist you.

What does our ECS warranty cover?
We offer 1 year warranty as standard and additional years can be added to fit your needs. Please reach out to a sales associate via the Contact Us page or live chat for more information on extended coverage options. During the coverage period if your product fails we will offer a Next Business Day replacement. If we are unable to replace the product we will refund its original selling price. Shipping costs and tax are not refundable. Express Computer Systems retains the right to decide whether the goods will be replaced or refunded.

What is not covered by our warranty?
Our warranty does not cover any problem caused by the following conditions:

  1. accidents; misuse; carelessness; electrostatic discharge; shock; temperature or humidity beyond the specifications of the product; improper installation; operation; modification;
  2. any improper use that contravenes the instructions in the user manual;
  3. problems caused by other equipment. Our warranty is void if the product is returned with damaged, removed, counterfeit labels, or any modifications (including any component or external cover removal). Our warranties do not cover data loss or damages to any other equipment. In addition, our warranties do not cover incidental damages, consequential damages, or costs related to data recovery, removal, and installation.

Important notes:

  • Please ask for additional warranty/coverage that you may require in addition to the standard 1 ECS warranty prior to final purchase. Requesting additional warranty after your purchase can be denied.
  • FREE technical support is provided on purchased items via phone, email, or live chat.

About Express Computer Systems

Express Computer Systems is committed to transforming our customers’ IT infrastructure with high quality products at affordable costs. Our sales reps and customer support engineers understand our customers rely heavily on advanced technology to run their business but need to do so without breaking the bank.

We specialize in building custom server configurations, custom storage solutions, networking solutions, and components from top manufacturers including HPE, Dell, Cisco, NetApp, Dell EMC, HPE Nimble and many others.

Same-Day Shipping
At Express Computer Systems, we know hardware emergencies can happen at anytime. We also understand that you want to receive the best hardware as quickly as possible. At Express Computer Systems we'll ship the majority of our orders out the same day payment is made. Curious if the item you need will make it out on time? Feel free to contact us directly via the Contact Us link at the bottom, Live Chat feature or (800) 327-0730.

Buy, Sell, Rent, Lease, Trade-In
At Express Computer Systems we not only will sell you equipment at a great value, but we'll also purchase your used Dell, Cisco, NetApp or other networking equipment. Feel free to contact us with the model of the items you're looking to sell and we'll get you a quote ASAP. We also have flexible financing options for your purchasing needs.

In-House Configuration and Testing Lab
Every item we sell is tested on-site in our state-of-the-art hardware engineering lab. We use certified technicians to test every piece of equipment as well as updating all necessary firmware. The highest quality of testing and certification is guaranteed. We warranty all of our items we sell. Ask us today about warranty for a specific item.