There's been a lot of buzz on the internet in the past few days about the speed of USB 3.0. Some sites are reporting that recent tests of the new standard are producing slower-than-expected results, and many readers are confused about how realistic the touted theoretical bandwidth of 5000 megabits/sec really is. We spoke with Jeff Ravencraft, President of the USB Implementer's Forum, (who also gave us our first look at USB 3.0 back at last year's IDF conference) to set the matter straight and get a demo of the latest SuperSpeed hardware in action.
Read on to find out what speeds you can really expect from USB 3.0!
Though many people are keenly awaiting the commercial launch of USB 3.0, it is advisable that they subdue their alacrity a touch as it will take some time for the technology to warm-up. A prototype USB 3.0 hard drive being showcased at the ongoing Consumer Electronics Show is only able to manage read speeds up to 1320Mb/s and writes speeds of up to 1000Mb/s, which is around a quarter of what is possible with USB 3.0.
A representative for the USB Implementers Forum also confirmed to TG Daily that it will take a bit of time before devices begin to fully tap the potential of the new technology.
We know, you just got your rig right where you want it, complete with a primo CPU, a kick-ass videocard config, and seemingly limitless storage. So forgive us if we dangle the temptation of better, faster hardware in front of your face. We’re just doing our job. Over the last few weeks, we’ve been grilling our industry contacts for news of what computing delights await power users in the months and years to come. And delightful the future is: CPUs with eight cores, GPUs that run games as a pastime, mobos with both SLI and CrossFire support, and hard drives so large your data will feel puny and inadequate. And that’s just part of it.
Look at it this way: Our 2009 technology preview gives you advance warning about the hardware that will soon occupy your dreams, so you can start saving your pennies and plotting your next upgrade path today.
This week marks a double whammy for PC I/O standards. With the USB Promotor Group announcing the final 1.0 version of the USB 3.0 standard, it has paved the way for the PCMCIA trade association to finalize its ExpressCard 2.0 standard, which it has done today.
"ExpressCard technology is closely tied to the PCI Express(r) and USB specifications, and the 2.0 release of our standard takes full advantage of recent advancements in both interface technologies," said Brad Saunders, chairman, PCMCIA. "Now that the new SuperSpeed USB specification is ready, PCMCIA can move forward to finalize the ExpressCard 2.0 release and make it available to members in early 2009."
Saunders went on to say that new products capable of taking advantage of the new standard will materialize in 2010. ExpressCard 2.0 gives the spec a considerable speed boost by supporting transfer rates up to 10 times faster than ExpressCard 1.2. The new 2.0 standard is also backwards compatible with products compliant with any previous standard.
No doubt you’re familiar with the Universal Serial Bus – we ranked it as our top PC innovation of all time. But what do you know about the next version of this ubiquitous interface? USB 2.0 (otherwise known as USB Hi-Speed) boosted the original 12Mbps data rate to 480Mmb/s over eight years ago, and now USB 3.0 (dubbed USB Superspeed) is set to multiply that bandwidth tenfold. The USB Implementers Forum (led by Intel) released the USB 3.0 spec to hardware partners last week after some reported disputes with AMD and Nvidia (who, afraid Intel would have a jump start in incorporating the tech in chipsets, threatened to develop their own USB standard). But how does this affect you? We dug up some new information about USB 3.0, got our hands on the new connectors, and even took a look inside the new cables.
Click through for the five reasons why we’re excited about USB 3.0
Toms Hardware reports that Intel’s "Extensible Host Controller Interface (xHCI) draft specification revision 0.9 in support of the USB 3.0 architecture, also known as SuperSpeed USB" is now available. This is a good indicator that we might see the first USB 3.0 demonstrations at next week’s IDF in San Francisco.
xHCI draft specification provides hardware component designers, system builders and device driver developers with a description of the hardware/software interface between system software. It is being made available under RAND-Z (i.e. royalty free) licensing terms to all USB 3.0 Promoter Group and contributor companies that sign an xHCI contributor agreement.
It doesn’t appear that the new spec will be backward compatible past USB 2.0. I find it hard to believe that USB 1.1 devices will be out of luck, so I plan to keep an eye on that aspect. USB 3.0 at 600 MB/s will offer a ten-fold increase in the bandwidth of USB 2.0 at 4.8 Gb/s. That is pretty impressive if it approaches it’s spec yield. USB 2.0 spec rate is 480 Mbit/s but typical USB PC-hosts rarely exceed sustained transfers of 280 Mbit/s.
Will you be wanting USB 3.0 on your future system?