Molex has unveiled its Impress Co-Packaged Copper solutions, a new standard in high-performance connectivity tailored for the most demanding data center and AI applications. The technology pushes the boundaries of data transmission speeds, supporting rates up to 224 Gbps PAM-4—a critical threshold for next-generation AI and hyperscale computing workloads.

Key specs and capabilities

  • Data rate: Up to 224 Gbps PAM-4 (with ongoing validation for 336G and 448G applications).
  • Architecture: Co-packaged connector system integrated directly onto ASIC substrates, reducing signal path distances through the PCB.
  • Signal integrity: Full-channel isolation from substrate to interconnect, minimizing loss and crosstalk.
  • Mechanical design: Compression-attached socket for substrate protection, over-molded cable strain relief, and mechanical contact wipe for durability.
  • Scalability: Compact form factor enabling higher density while maintaining power efficiency and upgrade flexibility.
  • Applications: Optimized for AI-driven data centers, LLMs, and cloud computing infrastructures.
  • Availability: Now shipping for 224G applications, with development underway for higher data rates.

A game-changer for AI and hyperscale computing

The Impress system represents a significant evolution from Molex’s NearStack On-the-Substrate (OTS) connectors, which have already delivered over a million units to mission-critical server architectures. By embedding connectors directly onto the ASIC substrate, Impress eliminates unnecessary signal paths through the PCB, drastically reducing latency and improving overall system efficiency. This approach is particularly vital as data centers grapple with the exponential growth of AI workloads, where even marginal gains in performance can translate to substantial cost and power savings.

Beyond raw speed, the design prioritizes reliability and ease of maintenance. The compression-attached socket protects delicate substrates during upgrades or rework, while features like over-molded strain relief and mechanical contact wiping ensure long-term durability in high-stress environments. This makes Impress not just a high-performance solution but also a practical one for data center operators managing complex, high-density deployments.

Future-proofing the data center ecosystem

Molex’s Impress solutions are part of a broader push to standardize 224G connectivity, complementing existing products like Mirror Mezz Enhanced and CX2 Dual Speed. As industries transition from 1.6T to 3.2T networking, the ability to support these speeds without compromising signal integrity or power efficiency is becoming a defining factor in data center architecture. Impress addresses this by offering a scalable, future-proof platform that can adapt to emerging demands—including the validation efforts currently underway for 336G and 448G applications.

The technology will be showcased at DesignCon 2026 (February 24–26 in Santa Clara), where Molex will highlight its broader portfolio of high-speed solutions, from RF testing to thermal management innovations. For data center operators and AI developers, Impress could mark a turning point in how connectivity is integrated into next-generation computing systems—bridging the gap between performance and practicality in an era of unprecedented data demands.