The OSFP-800G-OFLACxxx is a 2x 400Gb/s twin-port OSFP IHS/finned top to 2x 400Gb/s twin-port OSFP RHS/flat top direct attached copper cable. The ACC contains eight high-speed electrical copper pairs, each operating at data rates of up to 100Gb/s using 100G-PAM4 modulation. It complies with CMIS 5.0, IEEE 802.3ck, and OSFP Rev5.0 standards.
The OSFP end has a IHS/finned top for additional cooling, while the other OSFP end is RHS/flat top and relies on the host cage for heat dissipation. It is primarily used to connect an 800Gb/s switch to the DGX-H100 system.
ACC cables integrate a Redriver chip that extends reach up to 5 meters while ensuring latency, enhancing port bandwidth, density, and configurability. These power-efficient links are ideal for medium-distance connectivity in data centers, AI/HPC clusters, and cross-rack deployments.
Note: "Finned top" transceivers are now called "Integrated Heat Sink" (IHS) as the cooling fins are integrated into the OSFP connector metal top. Commonly used in air-cooled switches.
"Flat top" transceivers are now called "Riding Heat Sink" (RHS) as the cooling fins ride on top of the network card or system's internal cages. This is used for both air-cooled and liquid-cooled applications for DGX, ConnectX-7, and BlueField-3 DPUS.
