As data center bandwidth demands grow exponentially, choosing the right high-speed transceiver is critical. Here is a comparison of two dominant form factors:
QSFP28 (Quad SFP28): Used for 100G Ethernet, 4 channels of 25Gbps each. Widely deployed in current-generation data centers. Power consumption around 3.5W per modul.
QSFP-DD (Quad SFP Double Density): Used for 400G Ethernet, 8 channels of 50Gbps each. Power consumption 8-12W. Backward compatible with QSFP28 ports (with adapter).
Migration recommendation: For new deployments, consider QSFP-DD switches for future-proofing. For existing infrastructure, QSFP28 remains a cost-effective 100G sol.
MarStars supplies both QSFP28 and QSFP-DD transceivers, along with breakout cables and MPO patch cords for high-density installations.