I saw it in Everest Home Edition in my PCI devices section and it says "Supported, Disabled" next to the status of it in all of the devices except my X-Fi sound card, of which it says "Not Supported" for the status.  I would like to see what happens when it is enabled though.  Perhaps it could grant a performance boost in gaming?

Does anyone know what it is: a 1-page Google search brought me these:

Other talk of it:
http://www.lavalys.com/forum/lofiversio … t1171.html

http://www.msfn.org/board/index.php?act … mp;t=55898

"Fast Back to Back Transaction

The method of first back to back transaction is defined to use a bus efficiently.

Usually, one clock of idol cycle exists between the bus cycles (transaction) at least. The idol cycle is a buffer time to prevent each output from colliding, however, it can be omitted when device switching is not occured between the bus cycles."