Dual-Independent Bus Architecture (DIBA)

Like all IA32 processors starting with the Pentium® Pro, the Pentium® II had a dedicated BSB used to transfer data between the processor core and the L2 Cache and a FSB used to communicate with other system devices. The processor can use both of these buses simultaneously, thereby yielding better overall performance. With the advent of the Pentium® II processor, Intel® started referring to this as DIBA.