We have X9QR7-TF+; will Windows 7 see all four processors? If no, will Windows Server 2012 Standard support 4 processors?
X9QR7-TF+ can support 4 processors on both Win7 & Windows 2012 64 bit. Please refer to below link;
PCs with multi-core processors:
Windows 7 was designed to work with today's multi-core processors. All 32-bit versions of Windows 7 can support up to 32 processor cores, while 64 bit versions can support up to 256 processor cores.
http://windows.microsoft.com/en-US/windows7/products/system-requirements
http://blogs.technet.com/b/matthts/archive/2012/10/14/windows-server-sockets-logical-processors-symmetric-multi-threading.aspx