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+--- Thread: USB 3.0 (/showthread.php?tid=95850)
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USB 3.0 - sam ward - 04-15-2010
Started to post a question about this upgrade then found this.
USB 2.0 for many applications provides sufficient bandwidth for a variety of devices and hubs to be connected to one host computer. However, with today's ever increasing demands placed on data transfers with high-definition video content, terrabyte storage devices, high megapixel count digital cameras, and multi-gigabyte mobile phones and portable media players, 480Mbps is not really fast anymore. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps theoretical maximum throughput, making data transfer at around 320 Mbps - the actual real-world maximum. Similarly, USB 3.0 connections will never achieve 4.8 Gbps, but even 50% of that in practice is almost a 10x improvement over USB 2.0.
Believe the 3.0 requires new cables but backward compatible with 2.0 input slots.
Re: USB 3.0 - jdc - 04-15-2010
And?
USB 3 is already out, PCI cards, Express Cards and even PC motherboards.
Just not on the Mac. At least this time next year before it happens, maybe later.
Re: USB 3.0 - hal - 04-15-2010
is USB3 ratified? is it real?
Re: USB 3.0 - Filliam H. Muffman - 04-15-2010
(sigh) Yes, it is real.
Four USB 3 enclosures tested and compared to USB 2.
http://www.tomshardware.com/reviews/usb-3.0-superspeed-external-enclosure,2597.html
Unfortunately, they ran up against the SATA 2.0 3 Gbps bottleneck. The next versions in a few months should reach 300 MB/s with SATA 3.0 6 Gbps bridge boards, or when the drives have full speed native USB 3 connectors. Okay, anybody still want to stick with FW800 at 80 MB/s?
Re: USB 3.0 - hal - 04-15-2010
hell no - dump FW and move on!
Re: USB 3.0 - jdc - 04-15-2010
If they could only make USB 3 reliably bus powered (no dual plug dohicky) and daisy-chainable...
Re: USB 3.0 - Fred_Also - 04-16-2010
I thought Light Peak was going to kill USB 3 in it's infancy. From what I've read, Apple and Intel are big on Light Peak.
http://dvice.com/archives/2010/04/light-peak-to-k.php
Fred Also
Re: USB 3.0 - Filliam H. Muffman - 04-16-2010
My laptop has 6 USB ports. If they were all USB 3, why would I need/want to daisy chain two drives and slow down both of them?
Re: USB 3.0 - Doc - 04-16-2010
How the heck do testers squeeze 35MB/s out of USB 2.0?!
I feel lucky when speeds break 26MB/s over USB.
Re: USB 3.0 - M A V I C - 04-16-2010
Filliam H. Muffman wrote:
My laptop has 6 USB ports. If they were all USB 3, why would I need/want to daisy chain two drives and slow down both of them?
Is that a Mac laptop? MBP's only come with 2 USB ports... we need all the daisy chaining we can get.