Dell 2950 PowerEdge
Can a Dell 2950 PowerEdge 2 Server support an Intel X540T2 10GbE network card?
I have resolved this myself. I registered on Intel's site and posted my questions on the network forum for which I received a superb reply to this and other questions I had. The answer is yes it is supported on older PCI Express 1.0 bus types but runs a slight bit slower. There are also NetEffect 10GbE models that were built for PCI Express v1.1 that support iWARP and offloading that can also run on those nodes but obviously you need a host OS that is capable of using RDMA which Windows Server 2012 supports fully.