Fujitsu PRIMERGY CX400 M4
The Fujitsu PRIMERGY CX400 M4 is a 2U multi-node chassis housing up to four independent dual-socket CX2550 M4 server nodes. Designed for high-performance computing (HPC) clusters, cloud hosting, and hyperconverged infrastructure, the enclosure provides shared redundant hot-plug power supplies and centralized high-efficiency fan modules.
Specifications
| Brand | Fujitsu |
|---|---|
| Family | PRIMERGY CX |
| Form factor | 2U 4-node |
| Released | Aug 2017 |
| End of sale | Mar 2022 |
| End of support | Mar 2027 |
| Form factor | 2U 4-node |
| Sockets | 8 |
| Processor family | Intel Xeon Scalable (1st/2nd Gen) |
| Memory slots | 64 |
| Max memory | 8TB DDR4-2933 |
| Drive bays | Up to 24x 2.5-inch hot-plug SAS/SATA/NVMe |
| Power supplies | 2x 2400W Redundant Platinum/Titanium |
Generations
- Next generation: Fujitsu PRIMERGY CX400 M6
Works together
How the Fujitsu PRIMERGY CX400 M4 connects to servers, storage and the network: 4 ways, with the parts and products on each path.
Fibre Channel SAN
Match the speed: 16Gb and 32Gb FC HBAs, switches and array ports work together, and each generation also runs one or two speeds below its own (a 32Gb port runs at 16Gb and 8Gb).
Switches
Brocade G-Series G610 1U
Cisco MDS 9132T 1U
Dell Connectrix DS-6620B 1U rack
Dell PowerSwitch S4148U-ON 1U switch
Storage
Fujitsu ETERNUS DX60 S4 2U rack
Fujitsu ETERNUS DX60 S5 2U rack
Fujitsu ETERNUS HB1100 2U rack
Fujitsu ETERNUS HB2100 2U rack
Fujitsu ETERNUS HB2200 2U rack
Lenovo ThinkSystem TS4300 Tape Library 3U rack
Optics
57-1000262-01 Brocade 16G FC SFP+ ELWL 25 km
57-1000333-01 Brocade 32G FC SFP+ SWL
57-1000487-01 Brocade 16G FC SFP+ SWL
iSCSI and NVMe/TCP over Ethernet
Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.
Switches
Arista 7020R 7020TR-48 1U fixed switch
Arista 7060X 7060CX2-32S 1U fixed switch
Arista 7280R 7280CR2-60 2U fixed switch
Arista 7280R 7280SR2K-48C6 1U fixed switch
Storage
NetApp E-Series E5700 2U/4U rack
Dell Isilon A2000 4U 4-node chassis
Dell Isilon F800 4U 4-node chassis
Dell Isilon H400 4U 4-node chassis
Dell Isilon H500 4U 4-node chassis
Dell Isilon H600 4U 4-node chassis
Optics
QSFP-100G-CWDM4-AR Arista 100GBASE-CWDM4 QSFP28 Optical Transceiver Module
QSFP-100G-LR4-AR Arista 100GBASE-LR4 QSFP28 Optical Transceiver Module
QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
Direct-attached SAS
12Gb SAS uses Mini-SAS HD (SFF-8644) connectors; older 6Gb gear uses Mini-SAS (SFF-8088). Adapter cables exist, but the link runs at the slower speed.
Storage
Lenovo Lenovo Storage DS2200 2U rack
Lenovo ThinkSystem DS4200 2U rack
Dell PowerEdge MX5016s blade
Lenovo ThinkSystem DE2000H 2U rack
Lenovo ThinkSystem DE4000F 2U rack
Dell PowerVault ME4012 2U rack
File storage (NFS and SMB)
Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.
Switches
- Arista 7020R 7020TR-48 1U fixed switch
- Arista 7060X 7060CX2-32S 1U fixed switch
- Arista 7280R 7280CR2-60 2U fixed switch
- Arista 7280R 7280SR2K-48C6 1U fixed switch
Storage
Fujitsu ETERNUS DX100 S4 2U rack
Dell Isilon A200 4U 4-node chassis- Dell Isilon F800 4U 4-node chassis
- Dell Isilon H400 4U 4-node chassis
- Dell Isilon H500 4U 4-node chassis
Dell Unity 350F 2U rack
Optics
- QSFP-100G-CWDM4-AR Arista 100GBASE-CWDM4 QSFP28 Optical Transceiver Module
- QSFP-100G-LR4-AR Arista 100GBASE-LR4 QSFP28 Optical Transceiver Module
- QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- SAN transport and NVMe over FC for backup mrplanb.com
Check compatibility with Fujitsu
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Fujitsu has tested with the Fujitsu PRIMERGY CX400 M4.
- Specifications Fujitsu PRIMERGY and ETERNUS product documentation
- Support Fujitsu Support
Equivalent models from other brands
- Dell PowerEdge C6420 · compare
- HPE Apollo 2000 Gen10 · compare
- Supermicro BigTwin Multi-Node System · compare
FAQ
How many server nodes operate within the CX400 M4 chassis?
The CX400 M4 enclosure holds up to four independent half-width 1U server nodes or two half-width 2U nodes.
Can nodes be removed while the rest of the chassis is powered on?
Yes, each server node tray is hot-swappable and independently manageable.
Buying or selling PRIMERGY CX400 M4?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Fujitsu PRIMERGY CX400 M4 Datasheet, checked 2026-10-28