![]() In 2003, USB 2.0 connectors were introduced on computers. Since USB-compliant devices can draw power from a USB port only a few power drawing devices can connect at the same time without the computer system complaining. It can transfer data to a speed of 12 megabits per second, but those 127 devices have to share that speed. If you use a USB hub, (example: 4 port hub), you can connect as many as 127 devices to a USB port. Another view of a USB port can be seen here. Sometimes there are USB ports built into a hatch on the front of a computer. There are normally two half-inch long USB ports on the back of computers built since 1998. It's used to connect all kinds of external devices, such as external hard drives, printers, mice, scanners and more. USB Port A universal serial bus port, introduced around 1997, is the gateway to your computer. IEEE 1394 connectors can be used to connect up to 63 external devices to a machine. Creative Labs which incorporated it into their SoundBlaster Audigy Platinium products call it SB 1394 (pictured on the right). It was also adopted as an industry standard and is called IEEE 1394 on non-Apple computers. Apple invented this technology and had branded it Firewire. Data can move across the port at up to 400 megabits per second. Usually camcorders and other video equipment use this port to get data onto a computer. This is not the only example of why answering a question like this by citing theoretical maximums does not provide a correct answer.Firewire - IEEE 1394 - iLINK This port is used to transfer large amounts of data very quickly. So in data throughput FireWire 400 will beat USB 2.0, even though USB 2.0 has a higher theoretical maximum. That is, control signals are sent through the same pipe that is used to move data.įirewire does not have this restriction to consider. This is because 20% is used for controlling the bus. This means that the theoretical maximum throughput data rate is closer to 384 Mbps. HOWEVER, the USB bus charges you approximately 20% overhead. USB 2.0 can push (theoretical maximum) 480 Mbpsįirewire 400 can push (theoretical maximum) 400 Mbps My choices for vehicle are:Ī School bus, top speed 70 miles per hourĪ Lamborghini, that can do 220 miles per hour I have 80 people that I need to move one mile as fast as possible. This is a perfect example of an incredibly poorly worded question arriving at the incorrect "popular" answer. ![]() (poorly designed or cheap component, etc., causing a bottleneck) We really need more real world comparisons with various different hardware components. as long as there's nothing choking your chain, so to speak. It's probably relatively safe to go with eSATA or USB 3.0 and get speeds that are close to optimal. (we need more variety to be sure, and even then, your system (or any given system) may not produce comparable benchmarks)Īnother seems to suggest USB 3.0 "Turbo" (whatever that is?) has a bit over eSATA, at :īut I have to question that, suggesting ~200 MB/s hard drive read/write speeds - unless hard drives have dramatically improved recently, I don't believe those speeds are physically possible, and suspect those speeds are just cached. There's one at :īut even this leaves some question, as perhaps their specific USB 3.0 implementation is not optimal. Theoretical maximum and real-world speeds can vary wildly, and only some significant actual testing will give meaningful answers. ![]() Intel Thunderbolt, as per the Wikipedia SATA link just above, is 10Gbit/s.Īlso, none of these answers so far give any practical/useful information. When considering throughput the list looks entirely different.įor the speed/throughput/bandwidth of more devices have look at this article on wikipedia USB 2.0 sends command and control data through the same connection the data uses limiting the 480 Mbps connection to 380 to 400 Mbps. The entire 400 Mbps is available for data transfer. As an example, FireWire 400 is a serial connection. However, this does not provide the actual answer.
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