The Importance of Low Voltage in 800G QSFP-DD Optical Modules
As hyperscale data centers continue to scale their AI workloads, power efficiency has become as important as bandwidth. In this context, low voltage design is no longer a bonus—it’s a requirement. At our Taiwan-based optical transceiver factory, we focus on optimizing QSFP-DD 800G modules to meet the lowest power targets while maintaining signal integrity.
Why Low Voltage Is Crucial for Modern Data Centers
1. Reduced Power Consumption
Lower voltage operation directly results in lower power draw per module. In a rack of 32 OSFP or 800G QSFP-DD modules, every watt matters. A module that operates at 0.85V or 1.0V instead of 1.8V can contribute significantly to overall energy savings.
2. Thermal Performance
Low-voltage transceivers generate less heat, allowing for denser deployments without sacrificing thermal stability. This is especially critical in air-cooled or liquid-cooled GPU clusters powered by NVIDIA H100 systems.
3. Enhanced Compatibility
Many newer ASICs and switch platforms (e.g., NVIDIA SN5600, Broadcom Tomahawk 5, Arista 7060X6) are optimized for low voltage signaling. Using modules that match their electrical interface avoids signal integrity issues and simplifies tuning.
How Our Taiwan Factory Designs for Low Voltage Success
As a vertically integrated optical transceiver manufacturer, we design, test, and validate every module against low-voltage compliance standards such as:
- CMIS 5.2 low-voltage I²C operation
- Support for host-side 1.0V or 0.85V VDD
- Compatibility with 800G low-power DSPs and EML/SiPh TOSAs
We also rigorously test with host systems such as:
- Arista 800G DCS switches
- NVIDIA SN5600 and CX7 NICs
- Broadcom NIC BCM957508/608 series
Case Study – 800G QSFP-DD in Low-Voltage AI Cluster
In a recent deployment involving a 10,000-GPU NVIDIA H100 cluster, our low-voltage QSFP-DD 800G FR4 modules reduced power usage by 11% per rack compared to the industry average. This resulted in:
- Lowered cooling costs
- Improved cluster uptime
- Simplified host compatibility
Future-Ready with Low Voltage Designs
With the upcoming shift toward 1.6T transceivers and CPO (Co-Packaged Optics), low-voltage operation will become the default. By building low-power expertise today, we ensure forward compatibility for tomorrow’s data centers.
Conclusion: Low Voltage Is the Foundation of Scalable Optics
Whether you’re building a GPU fabric, Ethernet spine-leaf architecture, or DCI backbone, choosing low-voltage 800G optical transceivers ensures better thermal headroom, lower TCO, and greater deployment flexibility.
Ready to deploy low-voltage 800G QSFP-DD transceivers in your network? Contact our Taiwan-based team today for samples, datasheets, and technical guidance.
About Optech
Optech Technology Co. Ltd was founded in 2001 in Taipei, Taiwan. The company was created with a sole purpose, to provide a wide and high quality portfolio of optical products to a very demanding and fast evolving market.
To respond to the permanent increase of IP traffic, Optech portfolio is constantly growing. Since the beginning, the company has always been up to date with the latest innovations on the market. Today, we are proud to deliver a large selection of 25G SFP28, 40G QSFP+, 100G QSFP28, 200G QSFP56, 400G QSFP-DD, 800G QSFP-DD and OSFP optical transceivers and cables.
Optech has a large portfolio of products which include optical transceivers, direct attach cables, active optical cables, loopback transceivers, media converters and fiber patch cords.
Through its large selection of optical products, that have a range of data speed from 155 Mbps to 800 Gbps and reach distances up to 120km, Optech products are suitable for various industries such as telecom, data centers as well as public and private networks.
Optech’s compatibility brands are available click here.
For additional information about 800G QSFP-DD, or price inquiry, please contact us at sales@optech.com.tw
