FireWire vs USB: Which is Faster?

Most modern Macs—except for the MacBook Air and some MacBook models—offer both FireWire and USB connections. When shopping for an external hard drive, then, you have many options for something that will work with your Mac. Today, USB hard drives are more common and less expensive than FireWire or even FireWire/USB combo drives.

But ubiquity doesn’t necessarily equate to superiority. All other areas of comparison aside, what many people want to know is how the two technologies match up in terms of speed. USB 2.0 has a maximum theoretical bandwidth of 480 Mbps, versus 400 Mbps for FireWire 400 and 800 Mbps for FireWire 800. To get a sense of real-world performance, however, we ran drive tests on both a 2.4GHz 17-inch MacBook Pro with a 160GB, 5400RPM internal hard drive and a Mac Pro 3GHz 8-core system with a 250GB, 7200RPM internal drive (each with OS X 10.6.2 and 2GB of RAM installed).