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Thanks for the answers Guys.<br />
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I think I'm going to stick with single NIC in the VM and see how performance goes.
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I have created a Server 2012 VM on ESXi5.1 and have added multiple network cards.<br />
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Am I right in assuming that each NIC in the VM will &quot;attach&quot; to a different physical NIC in the virtual switch (I have 3 NIC's in the virtual switch)?<br />
<br />
If so, can I use the in-built network teaming in 2012 to improve network bandwidth to and from the server?
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I have created a Server 2012 VM on ESXi5.1 and have added multiple network cards.

Am I right in assuming that each NIC in the VM will "attach" to a different physical NIC in the virtual switch (I have 3 NIC's in the virtual switch)?

If so, can I use the in-built network teaming in 2012 to improve network bandwidth to and from the server?

VM with Multiple NIC's

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.

VMware

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.