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| Maximum Transfer Rate for USB 2.0 PCI Card | |||||
| Question | |||||
| Hi; If a USB 2.0 PCI card is installed, how could it ever deliver the rated 480MB/sec transfer rates? | |||||
| Answer | |||||
| USB 2.0 has a maximum data transfer rate of 480 megabits per second (Mbps). That's equivalent to 60 megabytes per second (MB/sec). The PCI bus provides up to 133 MB/sec data transfer to devices.
USB 1.1 = 12 Mbps (1.5 MB/sec) USB 2.0 = 480 Mbps (60 MB/sec) USB 3.0 = 4.8 Gbps (600 MB/sec) PCI (32-bit 33 MHz) = 133 MB/sec PCI Express x1 = 250 MB/sec PCI Express x4 = 1000 MB/sec PCI Express 2.0 x1 = 500 MB/sec PCI Express 3.0 x1 = 1000 MB/sec  Date: 2008-05-14 | |||||
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