# ServeTheHome

> We test the MikroTik CRS804-4DDQ-hRM a 4-port 400GbE network switch that we have been using for local AI clusters

- **Website:** https://servethehome.com/mikrotik-crs804-4ddq-hrm-review-marvell-annapurna-labs-400gbe
- **Pricing:** paid
- **Categories:** Developer Tools, Design
- **Tags:** developer-tools, design
- **Platforms:** Web
- **Last verified:** 2026-09-10
- **Canonical page:** https://linkrena.com/tools/servethehome

## About

Today, we are taking a look at the MikroTik CRS804-4DDQ-hRM. We have a number of these now and have been running our RDMA network backend for the 8x NVIDIA GB10 cluster for several months now, using one. We also have an NVIDIA GB300 Station cluster running on another (using DR4 optics). The exciting part of this is that there are four 400GbE QSFP56-DD ports for a total of 1.6Tbps of network bandwidth. The list price is $1295, but these often sell at a street price of $1100 or so, making this under $0.70/Gbps. Putting that into perspective, it is like an 8-port 1GbE switch for only $5.50 per Gbps. While $1100 is not a low number, on a $/Gbps basis, this is actually really cheap for a new switch.

If you want to purchase these, they are in high demand, but we bought ours from B&H ( Affiliate link ).

Starting off, this is a half-width switch at only 218mm wide but 387mm deep. For those with small lab half-width switches, it will be challenging to fit many of them due to the depth. We will show side-by-side mounting options later.

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