Just installed a new Master/Media server running Windows 2008R2. 32GB ram, two dual 8Gbps HBA, Dual 4 core Intel Xeon E5-2609v2.
Connected to the network @ 4Gpbs (4 x 1G) links.
4 Tape library's (IBM 3573) with 4 HH LTO 6 3580 (fibre).
I am running 7.5.1 right now but ...