The Cisco Nexus 9316D-GX Switch (Figure 1) is a 1RU switch that supports 12.8 Tbps of bandwidth and over 4.3 bpps. The switch can be configured to work as 10/25/40/50/100/200/400-Gbps offering flexible options in a compact form factor. Please see feature table below for more information.
The Cisco QSFP-DD800 modules introduce 8x100G and 2x400GGBASE Quad Small Form-Factor Pluggable Double-Density (QSFP-DD) modules, offering customers super-high-density pluggable transceivers along with the flexibility of 400 Gigabit Ethernet and 100 Gigabit Ethernet connectivity options for data centers, high-performance computing networks, enterprise core and distribution layers, and service provider applications.
You can try to see the module information through "show inventory" and "show interface <interface-name> transceiver details".