I have several Intel Dual NICs that I am using in desktop boards. In total I have 3 cards, 2 are HP NC360T's and one is an actual Intel branded card. All of them work just fine. My main file server here at home has a MSI 890GXM-G65 motherboard that I have tested all the cards in. Then my main desktop has a MSI P55-GD65 motherboard and all the cards work just fine in it too.
Note: I am using the latest Intel NIC driver that supports the Intel PRO/1000 PT Dual Port Server NICs
00Roush