MikroTik CRS804-4DDQ-hRM — Professional Enterprise Network Switch

MikroTik CRS804 DDQ is a compact 400 Gigabit 1U switch designed for AI clusters, storage fabrics, and ultra-fast aggregation in environments where bandwidth density and energy efficiency are critical priorities. It is deployed in small and medium data centers, enterprise pods, and edge compute installations where traditional 400G equipment is prohibitive in size or cost. It delivers the most competitive bandwidth density in the ultra high-speed segment in a compact and silent form factor, with full functionality available at no recurring cost.

CRS804 DDQ features 4 QSFP-DD 400G ports built on 8 independent data lanes each, providing maximum breakout flexibility: two 200G links for intensive AI workloads, or 100G and 40G connections for integrating equipment from previous generations. With appropriate breakout cables, the switch ensures compatibility with any device equipped with SFP or QSFP ports, protecting investment in existing infrastructure. Dual 1/10G Ethernet ports enable integration into hybrid topologies without additional intermediate equipment. The Marvell 98DX7335 switch chip, quad-core ARM 2.0 GHz processor, and 4 GB DDR4 RAM form a wire-speed switching platform with advanced traffic management through RouterOS v7 (License Level 6).

Hot-swap power supplies are included in the package, providing complete N+1 redundancy at no additional cost — a significant operational advantage over alternatives in the segment. A power draw of just 123W at full load with optics installed makes the CRS804 DDQ the right choice for environments with energy and space constraints. The included RMK-2x10/19 accessory allows two CRS804 DDQ switches to be mounted simultaneously in a single 19-inch 1U rack slot, doubling port density without occupying additional rack space. Hot-swap replaceable fans ensure maintenance without downtime in active production environments.

Recommended for small to medium AI and GPU clusters requiring 400G interconnects, all-flash storage fabrics with native 400G uplinks, and compact spine fabrics in small data centers and enterprise pods. Also suited for edge compute installations where traditional 400G equipment is prohibitive, and for existing networks requiring a transition to ultra-high speeds without complete infrastructure replacement.