Mellanox ConnectX-5 Ex Ethernet Adapter Card with Breakout Cable 4 x 25Gbps

I have the following scenario:
Network Aggregator with 4 x 25Gbps ports that i want to connect into 100Gbps Mellanox ConnectX-5 Ex Ethernet Adapter connected into a Dell PowerEdge R760XL. Only RX on the Mellanox will be used.
Does anyone knows if this is supported by the NIC card?