vt-d

Ive purchased a used C6100 for a very good price. I've read alot on these forums for this server. I'm a bit late to the game but it will still serve me quite well for what I need. I'm having issues, though, with VT-D. Has anyone succeeded in fully enabling VT-D? Everything suggests it should...

I have Dell Optiplex 790. I bought it for $40. It has an i3-2120, 250 GB HDD, and 2 X 2 Gb of DDR3. I'm planning on using it for an ESXi box for Zoneminder and pfSense. I'm wanting to utilize VT-d so I could pass a network card to pfSense. I am looking at buying an i5-2390T for lower wattage...