We would like to use 748TQ-R1400B with X8QB6, but on your website it does not mention if air shroud is needed, what kind of air shroud can I use with such?
http://www.supermicro.com/products/chassis/4U/748/SC748TQ-R1400.cfm
You may use MCP-310-74803-0B ( Mylar air shroud for SC748 (X8QB6) ).