CRS804 DDQ
CRS804 DDQ is a compact, affordable 400G switch with 4× QSFP-DD ports, breakout capabilities, dual hot-swap PSUs, and full wire-speed switching — ideal for AI clusters, storage fabrics, and next-gen high-speed networks.
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The CRS804 DDQ is MikroTik’s most compact and cost-effective entry into the 400 Gigabit switching world. Designed for AI clusters, high-performance storage fabrics, and modern data aggregation, this switch delivers full wire-speed performance across all ports thanks to the powerful Marvell 98DX7335 switch chip.
With four 400G QSFP-DD ports, each built from 8 independent lanes, the CRS804 DDQ supports flexible breakout configurations — including 200G, 100G, 50G, 40G, 25G, 10G, 5G, 2.5G, and 1G links. This means it integrates smoothly into new or legacy infrastructure, letting you upgrade at your own pace without replacing existing equipment.
The switch features a quad-core 2.0 GHz ARM CPU, 4 GB RAM, dual 1G/10G Ethernet ports, dual hot-swap power supplies, and dual hot-swap cooling fans, ensuring stability and long-term reliability in demanding setups.
Compact, efficient, and quiet, the CRS804 DDQ fits perfectly into small data centers, research labs, AI development environments, and enterprise backbone networks where traditional 400G solutions are too expensive or power-hungry.
Key Features
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Four 400G QSFP-DD ports with breakout to 200G/100G/50G/40G/25G/10G/5G/2.5G/1G
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Two 1G/10G Ethernet management/uplink ports
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Full wire-speed switching thanks to Marvell 98DX7335
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** Quad-core ARM 2.0 GHz CPU + 4 GB DDR4 RAM**
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Dual redundant hot-swap power supplies included
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Dual hot-swap cooling fans
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Quiet, compact 1U form factor
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Ideal for AI clusters, GPU nodes, NVMe-over-Fabric, storage fabrics, and high-speed aggregation
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Only 123 W max power draw with optics installed
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Breakout-ready — works with SFP, QSFP, and QSFP-DD cables
Deployment Uses
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AI & GPU clusters: Low-latency, predictable switching for interconnected compute nodes
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Storage fabrics: Perfect for ultra-fast NVMe or all-flash architectures
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High-speed aggregation: Backbone switch for edge compute, enterprise pods, and small data centers
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Future-proofing existing networks: Add 400G without replacing older racks or cabling
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Compact 400G fabrics: Build powerful spine/backbone networks in limited rack space
- Product code
- CRS804-4DDQ-hRM
- CPU architecture
- ARM 64bit
- CPU
- Quad-Core AL52400 2000 MHz
- Switch chip model
- 98DX7335
- Operating System
- RouterOS v7, License level 6
- Size of RAM
- 4 GB
- Storage size
- 512 MB, NAND
- Max Power consumption
- 123 W
- Number of AC inputs
- 2
- AC input range
- 100-240 V
- Operating Temperature
- -10°C to +60°C
- RAM type
- DDR4
- Power adapter nominal voltage
- 12 V
- Power adapter nominal current
- 27.5 A
- Number of 1G/2.5G/5G/10G Ethernet ports
- 2
- Number of 400G QSFP56-DD ports
- 4
- Max power consumption (without attachments)
- 92 W
General information
All students who attend the Training can receive a free L4 license from MikroTik. Training should be at least three days long.
Students are allowed to take the certification test ONLY upon the attendance of individual training course, in the class, under the supervision of a MikroTik Certified Training Partner.
Each certification test consists of a pre-defined % of random questions (multiple choice and true/false) from specific question categories. Items also have a difficulty parameter. MTCNA test is generated from more straightforward questions, Advanced tests – from more difficult questions.
Only one attempt is allowed. The test must be finished within one hour. The passing grade is set to 60%. There are 25 questions in the exam.
Certificate numbers and RouterOS L4 licenses are assigned automatically by MikroTik. Students can see their certificates and generate license keys once logged into the account server. Printed documents from MikroTik cost USD 30 per piece. Shipping is not included.
Remote training sessions and certification exams are not allowed.
MikroTik Certification Test without prior attendance of particular MikroTik Training Session is not allowed.
Wireless Netware offers every participant a free RouterBOARD hAP-ac-lite.
The price includes class attendance, course materials, coffee breaks and lunch, "Only for local Training." The amount does not cover travel and accommodation expenses.
Please bring (very important): Laptop, power extension strip (10ft./3m) with five sockets, one long Ethernet cable (16ft./5m+) and several short Ethernet cables.
Cost: Early bird price for the course is $850. It is valid 15 days before the scheduled session, referring to the MikroTik Training website. The price will be $1050 after the early bird date. The price includes class attendance, course materials, coffee breaks and lunch," Only for local Training." The amount does not cover travel and accommodation expenses. Seating is limited to only four students. The seat is reserved and guaranteed just after the payment is received in full amount.
Certificates will only be valid for three years.
Become a consultant: It's simple if you have MTCNA (score 75%+) and at least one valid MikroTik Engineer level certificate (MTCRE, MTCWE, MTCTCE, MTCUME or MEDICINE) with score 75%+, apply by email with your mikrotik.com account name and fields of expertise and MikroTik will add you to the list. To stay on the consultant list, you will have to have valid certificates, participate in the MikroTik Forum and attend the ...M.U.M. events in your country conducting RouterOS case studies or workshops for the rest of the attendees.
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Returns:
All returns to WNT LTD. are handled as exchanges or store credit toward a future purchase. All returns must have a valid ...R.M.A. Number. To request an ...R.M.A. number, log into your account and select. ...R.M.A. from the options menu at the left of your screen. Identify the order and the product you wish to ...R.M.A. and follow instructions on the screen. Once your ...R.M.A. request is received, our ...R.M.A. The team will review your application and respond within two business days or sooner. All products returned for an exchange or store credit must be returned within 30 days of the invoice date. Defective products received by the customer as ...D.O.A. must be reported within seven days. Shipping errors, such as incorrect quantities or incorrect product received, must be reported within seven days. Products purchased from our Clearance Sale, Overstock, Open Box or Special Order (...S.P.O.), or non-stocked items, or custom-assembled products, cannot be returned or exchanged. Order shipments, which arrived damaged, must have a completed. "Damage Parcel Report" with ...U.P.S., USPS, or DHL. All products being returned must be shipped pre-paid. Returns sent C.O.D. will not be accepted and returned to the shipper at the customer's expense. If the repair is under warranty, WNT LTD. will return the product to the customer, within Canada-Post, using Standard Service at no charge. Expedited shipping methods, international shipping costs, customs fees, and duties are the customer's sole responsibility. For non-warranty returns, the customer is responsible for all related shipping costs. All products being returned for store credit must be in the original box with all accessories, warranty cards and instructional sheets, and new, unused condition with the factory seal intact. We do not accept returns for products that have been opened or have missing parts, manuals, warranty cards, or damaged when returned (unless it's ...D.O.A.). A 25% restocking fee will apply. To ensure that the product remains in returnable condition, do not use the product box as the shipping box. You must repackage in another box with appropriate packing materials. Products arriving in a product box will be returned to the shipper at the customer's expense. The customer is responsible for adequately packaging the products returned. Contents of the package not matching the information on the ...R.M.A. form will be cause for the return of ALL equipment.