Found this on the Intel support site:[URL]   Which basically says that the a the PRO/1000 PT Quad port card will not work with PCIe 2.0 slots, it only works with PCIe 1.0a and earlier (the T110II has PCIe 2.0 slots)
Hi, We have recently got a Dell Poweredge T110ii server. When trying to install an Intel PRO 1000 PT PCI-E Quad EXPI9404PTBLK network card, it doesn't show in Windows 2008 R2 or ESXi? I have put the card into a different machine and it is working fine. I have updated Dell BIOS to the latest version. It's like the Dell doesn't see the card? Is it compatible? Any help appreciated.  
Intel PRO 1000 PT PCI-E Quad EXPI9404PTBLK T110