The NVIDIA/Mellanox MCA4K00-X001 is a 2x 800Gb/s twin-port OSFP to 2x 800Gb/s twin-port OSFP Active Direct Attached Copper cable. Using the Octal Small Form Factor Plug (OSFP) and contains eight high-speed electrical copper pairs, each operating at data rates of up to 200Gb/s. This cable is compliant with OSFP MSA (Multi-Source Agreement), IEEE 802.3df and 802.3dj, CMIS Rev5.0 standards.
Active DACs offer superior mechanical durability and excellent shielding to minimize crosstalk and deliver better signal integrity (SI) performance at a higher Nyquist frequency. Featuring a simple design and minimal components with RHS/flat top (OSFP-RHS) form factors, ACC cables provide power-efficient connectivity erhabling higher port bandwidth, density and configurability at a low cost and reduced power requirement in supercomputers and hyperscale systems.
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.
