I know the S3420GP had to be tested for VMware with an additional add-in NIC card. It could be the same for the S1200BTL.
I guess I thought when a MB was listed on the VMware HCL that ALL components on the MB were compliant. I don't see why Intel choose two different NICs to install on the S1200BTL and especially one not listed on the HCL?
Do the two NICs on the board you mention work with vSphere 5?
If they're not on Vsphere's HCL, I wouldn't spend too much time trying to get them to work - it might be faster to just get a second PCIe NIC to make it work.
Dan_O appreciate the reply's. I've already added extra NICs so I'm happy with the network config I have. I just think when Intel says a board is on the HCL that ALL components should work. How much could it have cost Intel to install TWO NICs that are on the VMware HCL?