http://blogs.technet.com/b/gmarchetti/archive/2008/06/19/i-ll-be-there-in-2-microseconds.aspxFantastic news! Mellanox has released the beta 2 version of their WinIB 1.4 stack , which works with HPC Server 2008 beta 2 and has Network Direct providers for their latest ConnectX cards. The results announced at ISC 08 are outstanding: - 2 microsecondsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)