PC Card-16 cards use an 8- or 16-bit interface that operates at ISA bus speeds (8 MHz) using an ISA-like asynchronous protocol. In contrast, Cardbus provides a 32-bit multiplexed address/data path, which operates at PCI local-bus speeds of up to 33 MHz that yields a peak bandwidth of 132 MB/sec. Besides supporting a PCI-like data rate, Cardbus devices are capable of acting as system-bus masters. They can assume control of the system bus to effect data transfers. This capability contrasts with PC Card-16 devices that can only act as slaves to system-resident master devices.