[virtuallynathan]

I understand that, but you can get more powerful ones for not much more money.

[detaro]

NICs or FPGA boards with NICs? If the latter, I'm all ears

[virtuallynathan]

Netronome, http://www.mellanox.com/related-docs/prod_adapter_cards/PB_P..., there are others for more $$ using the Altera Arria 10, or other Xilinx FPGAs with 2x40G or even 4x100G.