More than 8 network adapters for a VM?

Hi,

We are looking to set up a virtual router using Hyper-V (2012) and are wondering if there is some way we can have more than 8 network adapters assigned to a virtual machine?

I know we could use 4 legacy adapters but we need to additional performance offered by the standard network adapters.

Is there some way to increase the number of network adapters available to a VM to more than 8?

Cheers,

Stephen