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C-LIGHT CLQD8-QD8CU-1.5 is an 800G Direct Attach Copper Cable (DAC) in QSFP-DD form factor, designed for hyperscale data centers, AI clusters, and industrial automation. Leveraging high-performance copper and integrated signal conditioning, it delivers 800Gbps full-duplex transmission over 1.5m with ultra-low latency. Its commercial (0°C~70°C) and industrial (-40°C~85°C) temperature support ensures reliability from data centers to harsh factory floors.
Core Technical Advantages
●Extreme Density & Bandwidth
-800Gbps Full-Duplex: 8×100Gbps NRZ channels, compliant with IEEE 802.3ck for NVIDIA NVLink/AMD Infinity Fabric.
-QSFP-DD Double Density: Backward compatible with QSFP56/QSFP28, enabling 36 ports/RU (20% denser than AOC).
●Power & Cost Efficiency
-≤1.5pJ/bit Efficiency: No optical conversion, total power<5w>
-TCO Advantage: 50% cost savings vs. AOC by eliminating optics and fiber management.
●Industrial-Grade Robustness
-Vibration & EMI Resistance: Gold-plated connectors + shielded cable pass IEC 60068-2-6 tests for robotics/AGV environments.
-Wide-Temperature Operation: Industrial variant suits outdoor基站 and smart factories.
Applications
●AI/GPU Cluster Inter-Rack Connectivity
Links NVIDIA DGX/HGX systems with<100ns latency="" for="" billion-parameter="" model="" training="">
●Cloud Data Center TOR Networks
Delivers 25.6Tbps intra-rack bandwidth for containerized microservices.
●Industrial Control Systems
Ensures real-time signal stability between PLCs and vision systems in noisy environments.
●Enterprise Storage Upgrades
Replaces 40G/100G DACs, enabling 800G migration with legacy QSFP28 switches.
Why Choose C-LIGHT 800G DAC?
●Protocol Flexibility
Supports InfiniBand HDR, 800GAUI-8 Ethernet, and RoCEv2 for heterogeneous computing.
●Deployment Simplicity
Hot-swappable plug-and-play design reduces deployment time by 90% vs. fiber splicing.
●Lifecycle Management
Firmware upgrades and link health monitoring (per SFF-8436) enable predictive maintenance.
Installation & Maintenance
●Cabling Best Practices:
-Maintain bend radius ≥10× cable diameter to preserve signal integrity.
-Use layered cable trays to minimize crosstalk in high-density setups.
●Troubleshooting:
-Diagnose physical layer issues via switch port BER logs.
●Solution Comparison:
Choose DAC for ≤1.5m (cost/latency) vs. AOC for 1.5~30m (EMI resistance/weight)
If you are interested in the 800G DAC, please contact us
800G DAC Cable FAQ
An 800G Direct Attach Copper (DAC) cable is a high-speed copper interconnect designed for short-reach connections in AI data centers and HPC clusters. It delivers 800Gbps bandwidth while offering ultra-low latency, low power consumption, and cost-effective deployment.
Key features include:
800Gbps data rate
QSFP-DD or OSFP form factors
Passive or active copper design
Plug-and-play installation
Typical reach of 0.5–3m
It is ideal for server-to-switch and switch-to-switch connections.
An 800G DAC cable uses high-performance copper conductors to transmit electrical signals directly between network devices without optical conversion.
This design minimizes latency, reduces power consumption, and simplifies deployment, making it an efficient solution for short-distance, high-density networking.
The C-LIGHT 800G DAC is built for next-generation AI and cloud networking.
Key features include:
800Gbps full-duplex bandwidth
QSFP-DD and OSFP options
Ultra-low latency
Low power consumption
Commercial and industrial versions
Broad switch compatibility
These features provide reliable, high-density interconnects for modern data centers.
Compared with optical interconnects, an 800G DAC cable offers several important advantages.
Lower deployment cost
Extremely low latency
Lower power consumption
Simple plug-and-play installation
High reliability for short links
It is an economical solution for rack-level and adjacent rack connectivity.
800G DAC cables are widely used in short-distance, high-bandwidth networking environments.
Typical applications include:
AI and GPU clusters
Hyperscale data centers
High-Performance Computing (HPC) systems
Top-of-Rack (ToR) networking
Enterprise storage networks
These applications benefit from low latency and high-speed copper interconnects.
Both 800G DAC and 800G AOC are designed for high-speed interconnects, but they are optimized for different transmission distances.
DAC advantages include:
Lower cost
Lower power consumption
Near-zero latency
Easy deployment for short links
For links up to approximately 3 meters, DAC is typically the preferred solution, while AOC is better suited for longer-distance connections.
Selecting the right 800G DAC cable depends on several deployment requirements.
Cable Length
Select the required transmission distance.
Connector Type
QSFP-DD
OSFP
Cable Design
Passive DAC
Active DAC
Compatibility
Switch compatibility
Server compatibility
Operating environment and temperature
Choosing the appropriate cable helps ensure reliable performance and efficient deployment.
The C-LIGHT 800G DAC cable combines high bandwidth, ultra-low latency, and low power consumption for modern AI and cloud infrastructure.
It provides:
800Gbps transmission
Reliable copper connectivity
High-density deployment
Excellent compatibility
Cost-effective operation
It is an ideal solution for AI clusters, cloud computing, HPC systems, and next-generation data centers.
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