The power consumption of QSFP-DD (Quad Small Form-Factor Pluggable Double Density) transceiver modules can vary depending on the specific module type, its configuration, and the optical technology used. QSFP-DD modules are designed to support higher data rates, such as 200 Gbps and 400 Gbps, compared to their predecessors.

400G QSFP-DD

As of my knowledge cutoff date in January 2022, the maximum power consumption for QSFP-DD modules is generally higher than that of previous QSFP modules due to the increased data rates and additional electronics required for the double-density design. However, the exact power specifications can vary based on factors such as the module type (e.g., SR4, DR4, FR4), the type of optics (e.g., optical transceivers, DAC - Direct Attach Copper, or AOC - Active Optical Cable), and the specific manufacturer.

It's important to refer to the datasheets provided by the module manufacturer for the most accurate and up-to-date information on power consumption. The datasheet typically includes details about the power consumption under different operating conditions, including when the module is transmitting, receiving, or in a low-power mode.

Additionally, the power consumption of QSFP-DD modules can be influenced by features such as Forward Error Correction (FEC), the use of optics (e.g., single-mode or multimode), and the specific requirements of the networking equipment with which they are used.

As technology advances and new generations of optical transceivers are developed, power efficiency is often a focus to address the energy consumption concerns in data center environments. Therefore, it's advisable to check the datasheets of specific QSFP-DD modules or consult with the module manufacturer for the most accurate and current information on power consumption.