The CRS804 DDQ is a compact and reliable 400 Gigabit switch designed for modern AI workloads and next-generation network upgrades. With four 400G QSFP-DD ports and dual 1/10G Ethernet, it delivers exceptional bandwidth density in a quiet and efficient 1U form factor.
Inside, a Marvell 98DX7335 switch chip works together with a hefty quad-core 2.0 GHz ARM CPU, 4 GB of DDR4 RAM, and RouterOS v7. This provides advanced traffic control, high performance switching, and a familiar management environment trusted by users worldwide.
The CRS804 DDQ is designed for long-term reliability and low cost of ownership, supported by hot-swap power supplies (included!), robust cooling, and low power consumption that reaches only 123 W at full load with optics installed.
Where does it fit
AI and GPU clusters
A perfect building block for small to medium AI installations. It delivers predictable, low-latency performance and full wire-speed switching, keeping GPU nodes and storage traffic flowing without bottlenecks. The compact design and low power usage make it suitable for AI labs, research environments, and smaller rack deployments.
Future proofing for existing networks
The CRS804 DDQ can act as a high speed core oraggregation switch even in older racks. Each 400G QSFP-DDport is built from eight independent data lanes. This enablesflexible breakout options, including two 200G links for AIworkloads or lower-speed connections such as 100G or 40G.You can deploy the CRS804 DDQ in your existing networktoday and upgrade to higher speeds over time withoutreplacing the switch. With the right breakout cables, theCRS804 DDQ can interconnect virtually any device with SFPor QSFP ports, regardless of generation.
All-flash storage fabrics
Use native 400G ports for fast storage uplinks or split them into dual 200G links. Ideal for media production, scientific workloads, and any environment where rapid data movement is essential.
Compact 400G fabrics in limited rack space
Create a powerful spine or backbone fabric using four 400G ports. Perfect for small datacenters, enterprise pods, edge compute installations, and environments where traditional 400G equipment would be too loud, too large, or too expensive.
We have included the RMK-2x10/19 accessory, so you can mount two CRS804 switches in a single 1U slot of a standard 19-inch rack.
With CRS804, 400 Gigabits is no longer out of reach – it’s an affordable way to launch your network into the future, while keeping your existing gear in the loop!
Specification
Specifications
- Product codeCRS804-4DDQ-hRM
- Suggested price$1,295.00
- ArchitectureARM 64bit
- CPUAL52400
- CPU core count4
- CPU nominal frequency2000 MHz
- CPU Threads count4
- Switch chip model98DX7335
- RouterOS license6
- Operating SystemRouterOS v7
- Size of RAM4 GB
- Storage size512 MB
- Storage typeNAND
- MTBFApproximately 200'000 hours at 25C
- Tested ambient temperature-10°C to 60°C
Powering
- Number of AC inputs2
- AC input range100-240
- Frequency (Hz)50-60
- Max power consumption123 W
- Max power consumption without attachments92 W
- Cooling type2 fans
Ethernet
- Number of 1G/2.5G/5G/10G Ethernet ports2 (supported: 10M/100M/1G/10G)
- Number of 400G QSFP56-DD ports4
Peripherals
- Serial console portRJ45
Other
- CPU temperature monitorYes
- PCB temperature monitorYes
- Voltage MonitorYes
Certification & Approvals
- CertificationCE, EAC, ROHS
- IP20
Included parts2x IEC cordsRackmount bracket whiteRackmount rear support ears (2/2)Rackmount bracket (long)K-90 fastening setRMK-2x10/19NoteThe device has an operating system preinstalled and licensed. No separate purchase is necessary and the product is ready to use. The device includes free software updates for the life of the product or a minimum of 5 years starting from date of purchase.