ExpressCards featuring PCIe 1X technology are capable of 2.5Gb/s per direction, giving an ExpressCard operating in full duplex mode an approximate throughput of 250MB/s x 2, or 500MB/s of throughput, nearly quadrupling the effective speed of 32-bit PC CardBus. Differences between ExpressCard and PC Card ExpressCard features new interconnect technology ExpressCard utilizes two interconnect technologies, the most important of which is PCI Express ( PCIe). ExpressCard holds several advantages over PC Card some of which are enumerated below.
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