PowerEdge MX840c
Four-socket MX sled for large databases and memory-heavy VMs.
The PowerEdge MX840c is a previous-generation model, still supported and widely deployed. Four-socket MX sled for large databases and memory-heavy VMs.
Platform facts
| Vendor | Dell |
|---|---|
| Generation | 14G |
| Form factor | sled (double-width, MX7000) |
| Sockets | 4 |
| CPU | 1st/2nd Gen Intel Xeon Scalable (Skylake-SP / Cascade Lake-SP) |
| DIMM slots | 48 |
| Memory | DDR4 RDIMM/LRDIMM, up to 6 TB |
| Storage | 8x 2.5-inch SAS/SATA/NVMe; BOSS-S1 boot |
| RAID | PERC H730P, H745P MX; HBA330 MX; BOSS-S1 |
| Management | iDRAC9 |
| Released | 2018 |
| Status | previous |
Field notes
Takes two chassis slots, so four MX840c fill an MX7000. Memory population across four CPUs must match. Same OME-M ordering rules. Windows Server 2022 / ESXi 8.0 supported. No four-socket MX successor; use an R860 or R960 outside the chassis.
What we do with the PowerEdge MX840c
- Specification and procurement of new PowerEdge servers, configured to order
- Rack, rail and cable installation, iDRAC setup and firmware baseline
- Memory, NVMe, PERC and NIC upgrades with qualified parts
- Out-of-warranty repair: PSU, fan, backplane, PERC battery and motherboard replacement
- OS and hypervisor installs: Windows Server, VMware, Proxmox, RHEL, Ubuntu
- ProSupport case handling and lifecycle refresh planning
Related models
Related services
Frequently asked questions
Do you work on PowerEdge servers you did not sell?
Yes. Most of our Dell work is on servers a business already owns, in or out of warranty.
Can you update firmware without downtime?
iDRAC and some component firmware update live. BIOS, PERC and NIC firmware need a reboot, which we schedule in a maintenance window.
Can the PowerEdge MX840c run a current operating system?
Check the field notes above. As a rule, current models are certified for Windows Server 2022/2025, ESXi 8 and RHEL 9; legacy models usually stop at Windows Server 2019 or ESXi 7 and may need Proxmox or an older Linux to stay useful.
Need a hand with this?
Tell us what you are running and what is slowing you down. You get a straight assessment and a plan, with no obligation. Support desk is staffed 24/7.