Intel® Server Board S2600CW Functional Architecture  Intel® Server Board S2600CW Family TPS 
36    Revision 2.4 
 
 
 
 
 
 
 
 
 
 
 
3.4.3  PCIe Non-Transparent Bridge (NTB) 
PCI Express Non-Transparent Bridge (NTB) acts as a gateway that enables high performance, 
low overhead communication between two intelligent subsystems, the local and the remote 
subsystems. The NTB allows a local processor to independently configure and control the 
local subsystem, provides isolation of the local host memory domain from the remote host 
memory domain while enabling status and data exchange between the two domains. 
The PCI Express Port 3A of Intel® Xeon® Processor E5-2600 Product Families can be 
configured to be a transparent bridge or an NTB with x4/x8/x16 link width and 
Gen1/Gen2/Gen3 link speed. This NTB port could be attached to another NTB port or PCI