Similar to the requirements of a VMware vSphere solution, choosing the correct hardware is still an important part of any NSX deployment; therefore, you need to follow the same process that you did for vSphere to ensure the hardware you are deploying is on the VMware Compatibility Guide (http://www.vmware.com/resources/compatibility/search.php).
The compatibility guide does not only list the supported servers, but you need to also check if your network interface card (I/O devices) is supported and features such as VXLAN Offload and Receive Side Scaling are also supported.
