# InfiniBand/fibre optic cable BlueOptics QDD-400G-DAC-1M-BL 1m QSFP-DD Male/Male

**URL:** https://aio.lv/en/product--blueoptics-qdd-400g-dac-1m-bl--8373419
**Data updated:** 2026-03-07 15:17 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QDD-400G-DAC-1M-BL
**EAN:** 4063232288970
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 221.99 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 183.46 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qdd-400g-dac-1m-bl--8373419

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.08.2026 | free |
| Pickup points | 12.08.2026 | 1.89 EUR |
| Courier delivery to door | 12.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics QDD-400G-DAC-1M-BL is a 1 meter InfiniBand/fibre optic cable featuring QSFP-DD connectors on both ends. It is designed for high-speed data transmission and is ideal for connecting devices in data centers and high-performance computing environments. The male/male connector configuration ensures compatibility with a wide range of equipment.

## Long description

The BlueOptics QDD-400G-DAC-1M-BL is a 1 meter QSFP-DD to QSFP-DD direct attach cable (DAC) designed for 400G data transmission in InfiniBand and short-reach fibre optic/copper twinax environments. This male-to-male cable implements 400GBase-CR4 signalling over a 26 AWG twinax conductor and is MSA-compliant for use in racks and adjacent-rack connections within data centers and high-performance computing installations. The cable is intended for linking switches, routers, storage systems and other hardware platforms that support QSFP-DD 400G direct attach connections.
Advantages
The cable provides low-latency, high-bandwidth connectivity suitable for demanding network environments, while its passive twinax design keeps power consumption minimal. Compliance with MSA interconnect standards and use of quality components ensures stable transmission and broad hardware compatibility. The 1 m length is optimized for short connections inside racks or between adjacent racks, offering straightforward installation and low failure risk due to its simple passive construction.
Suitable for
High-performance computing clusters and InfiniBand fabrics
Data center rack-to-rack links and top-of-rack connections
Switch-to-switch, switch-to-router and switch-to-storage short-reach links
Environments requiring 400GBase-CR4 electrical connectivity over 1 m
Key specifications
Connector type: QSFP-DD male to QSFP-DD male
Nominal data rate: up to 400 Gbit/s
Length: 1 metre (approx.)
Cable type: passive twinax (copper) with 26 AWG conductors
Standards: MSA-compliant QSFP-DD form factor and 400GBase-CR4 signalling
Typical use: short-reach, within-rack or adjacent-rack connections
How to use
Install the BlueOptics QSFP-DD DAC by inserting each QSFP-DD plug into the corresponding QSFP-DD port on your hardware until it latches. Ensure that both devices support passive 400G DAC connections and the 400GBase-CR4 electrical protocol. Route the cable to avoid sharp bends and mechanical strain, and verify link status via the attached devices' management interfaces. For best results, perform a link test after installation and confirm negotiated speed and lane configuration in the equipment diagnostics.
Usage recommendations
Use this 1 m passive QSFP-DD DAC for short-distance, high-throughput links inside racks or between adjacent racks. Confirm compatibility with your switch, router or storage vendor and their firmware requirements before deployment. Avoid exceeding the recommended bend radius and keep the cable clear of hot airflow paths to maintain long-term signal integrity.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.15 kg |
| Package weight | 160 g |
| Operating temperature (T-T) | 0 - 70 |
| Cable length | 1 m |
| Data transfer rate | 400 Gbit/s |
| Product colour | Black, Silver |
| Connector 1 | QSFP-DD |
| Connector 2 | QSFP-DD |
| AWG wire size | 26 |
| Warranty period | 5 year(s) |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand/fibre optic cable BlueOptics QDD-400G-DAC-1M-BL cost, and is it available for purchase?

The price is 221.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All BlueOptics products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized BlueOptics service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/8373419/64376430_large.webp