Buenas Raul
El throughput soportado es d 1GB
http://www.cisco.com/c/en/us/products/collateral/routers/3900-series-integrated-services-routers-isr/data_sheet_c78-553980.html
Table 7 Traffic between modules is switched by the router MGF switch. Each module has a 1-Gbps-per-second link to the MGF.
Espereo esto responda su consulta