Dell PowerEdge M640 Blade 2-Bay 2.5" Drives
The Dell PowerEdge M640 is the 14th-generation half-height blade server for the Dell PowerEdge M1000e enclosure — built on dual-socket 2nd Generation Intel Xeon Scalable (Cascade Lake) with iDRAC9 and the same 14th gen platform advantages as the R640 rack server, in blade form factor. The M640 is the current-generation blade for M1000e infrastructure: if you have an M1000e enclosure and need new compute blades, the M640 is the platform to specify over the 13th gen M630.
Critical prerequisite: The M640 requires a compatible Dell PowerEdge M1000e enclosure. It is not a standalone server. Verify M1000e generation compatibility and I/O module versions before ordering. See the M1000e Enclosure page.
Blade vs. rack consideration in 2026: The M1000e blade ecosystem is a mature, well-understood platform — but it's no longer Dell's current blade architecture (that's now the MX7000 modular infrastructure with MX740C/MX840C compute sleds). Organizations with existing M1000e enclosures get good value from the M640; organizations building net-new blade infrastructure should evaluate the MX7000 platform or rack servers. We'll help you think through this at quote time.
Processors
Single or dual 2nd Generation Intel Xeon Scalable (Cascade Lake) — the same processor family as the R640. Up to 28 cores per CPU, up to 56 cores / 112 threads dual-socket. TDP range 85W Silver through 205W Platinum. iDRAC9 with Silicon Root of Trust.
Memory
Up to 24 DDR4 DIMM slots — 12 per CPU in dual-socket configuration. Maximum 3 TB with LRDIMMs. DDR4 at up to 2933 MT/s on Cascade Lake at 1 DPC. Same memory architecture as R640.
Local Storage — 2 SFF Bays
Two 2.5" SAS/SATA hot-swap bays — same local storage constraint as all half-height blade form factors. OS and application data only; primary workload storage via SAN through M1000e switching fabric. PERC H730P for local RAID. BOSS module available on 14th gen blade configurations for dedicated OS boot.
Networking
M640 mezzanine cards connect to M1000e I/O modules. 10 GbE and 25 GbE mezzanine options available. Confirm I/O module compatibility with planned mezzanine at quote time — Gen10+ Virtual Connect modules provide better feature sets than older Flex-10 infrastructure for M640 deployments.
Our Assessment
The M640 is the right blade for M1000e environments — iDRAC9, Xeon Scalable, 24 DIMM slots, current-gen management and security. For organizations with M1000e enclosures deploying new compute capacity, the M640 is the clear upgrade from M630. For organizations building new infrastructure without an existing blade chassis, evaluate whether M1000e/M640 or rack servers (R640, R440) provide better economics for your deployment model.
Navigation: 13th gen blade → M630 Blade [13th Gen]. M1000e enclosure → M1000e Enclosure. Rack alternative → R640 8-Bay. Next-gen modular → MX740C Compute Sled.
Workload Fit
| M640 is appropriate for | Consider rack servers for |
|---|---|
| ✅ Expanding existing M1000e infrastructure (14th gen) | ❌ No existing M1000e enclosure |
| ✅ Upgrading M630 blades to Xeon Scalable | ❌ New infrastructure without blade chassis |
| ✅ SAN-connected compute in M1000e blade form | ❌ Local storage-primary workloads |
Ready to Configure?
Blade configurations require M1000e compatibility verification. Contact our account team with your enclosure details, I/O module versions, workload type, and quantity. We respond within 24 hours.
Configure Your System:
Processor
Memory (RAM)
RAID Controllers
Storage Drives Select up to 2 drives (0/2 Slots Used)
Selecting SATA HDD will disable NVMe selections
Remote Access
Power Supply
If you are planning to add-on a GPU, we recommend selecting the highest TDP power supply to ensure optimization
Network Cards
Selecting a high-speed Ethernet card does not guarantee network speed if the rest of the network is slower
Operating System
Server Warranty
Add Ons
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