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This 40G QSFP+ cable delivers what you need most in your network connections: reliable performance. Itâs built to MSA specifications and fully tested to ensure seamless compatibility. This passive twin axial cable is a fully hot-pluggable, direct-attach cable, supporting 40 Gigabit Ethernet applications connected through QSFP+ (Quad Small Form-Factor Pluggable) ports. Designed for short-length, high-speed interconnects, this low-power, low-latency Twinax cable is a cost-effective alternative to fiber-optic cable assemblies, supporting short-distance applications such as point-to-point in-rack and across-rack network switch or server connections. Backed by a StarTech 2-year warranty, the QSFPH40GCU3M is a reliable replacement cable for the CiscoÂ® QSFP-H40G-CU3M.