Star USB 3.0 Is Ready to Go
Linked by Thom Holwerda on Mon 17th Nov 2008 19:18 UTC
Hardware, Embedded Systems Unveiled on Monday by the USB Implementers Forum, the USB 3.0 spec can theoretically support data-transfer speeds of up to 4.8Gbps - 10 times the speed provided by USB 2.0. The new standard, also known as SuperSpeed USB, is also expected to be more power-efficient than its predecessor. "SuperSpeed USB is the next advancement in ubiquitous technology," Jeff Ravencraft, the president of the USB Implementers Forum (USB-IF), the industry group that promotes USB technology, said in a statement on Monday. "Today's consumers are using rich media and large digital files that need to be easily and quickly transferred from PCs to devices and vice versa. SuperSpeed USB meets the needs of everyone, from the tech-savvy executive to the average home user."
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RE[3]: Comment by Macrat
by umccullough on Tue 18th Nov 2008 00:06 UTC in reply to "RE[2]: Comment by Macrat"
umccullough
Member since:
2006-01-26

Whether or not the B is capitalized makes a factor of 8 difference! bps is bits per second. Bps is Bytes per second. There are 8 bits to a Byte. USB 2.0 supports a theoretical 400 Mbps, therefore a theoretical 50 MBps. So, if you're seeing 12 MBps this is on the order of 25% of the theoretical maximum, and makes good sense.


Realistically though, with overhead of the protocol (control bits, etc.) a serial bus throughput usually boils down to a fraction of 10 anyhow.

Thus, 480Mbps (the actual alleged throughput of USB2, not 400 as was indicated) usually ends up with ~48MB/sec maximum... I'm not sure I've ever seen it hit this amount anyway ;)

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