Faster USB 3.0 Is Coming
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USB 3.0, released in November 2008, is the third major version of the Universal Serial Bus (USB) standard for interfacing computers and electronic devices. Among other improvements, USB 3.0 adds the new transfer rate referred to as SuperSpeed USB (SS) that can transfer data at up to 5 Gbit/s (500 MB/s after encoding overhead), which is about 10 times faster than Hi-Speed (maximum for USB 2.0 standard). It is recommended that manufacturers distinguish USB 3.0 connectors from their USB 2.0 counterparts by using blue color for the Standard-A receptacles and plugs,[2] and by the initials SS.[3]
USB 3.2, released in September 2017, replaces the USB 3.1 standard. It preserves existing USB 3.1 SuperSpeed and SuperSpeed+ data modes and introduces two new SuperSpeed+ transfer modes over the USB-C connector using two-lane operation, with data rates of 10 and 20 Gbit/s (1200 and 2400 MB/s after encoding overhead). This specification has been renamed to reflect the evolution of \"generations\" of USB standards (i.e.: USB3.2Gen1 is \"SuperSpeed\", USB3.2Gen2 is also \"SuperSpeed\", but 2x faster, USB3.2Gen2x2 is also marketed as \"SuperSpeed\" but is 4x faster than 3.2Gen1). Nomenclature has been broadly criticized by both experts in the industry and the public at large for its confusing revisions not reasonably or appropriately reflecting the marketing messages that the guidelines prescribe in the standard specification, which is published at usb.org [8]
USB 3.0 has transmission speeds of up to 5 Gbit/s or 500 MB/s, about ten times faster than USB 2.0 (0.48 Gbit/s) even without considering that USB 3.0 is full duplex whereas USB 2.0 is half duplex. This gives USB 3.0 a potential total bidirectional bandwidth twenty times greater than USB 2.0.[10] Considering flow control, packet framing and protocol overhead, applications can expect 450 MB/s of bandwidth.[11]
If faster connections to storage devices are the reason to consider USB 3.0, an alternative is to use eSATAp, possibly by adding an inexpensive expansion slot bracket that provides an eSATAp port; some external hard disk drives provide both USB (2.0 or 3.0) and eSATAp interfaces.[17] To ensure compatibility between motherboards and peripherals, all USB-certified devices must be approved by the USB Implementers Forum (USB-IF). At least one complete end-to-end test system for USB 3.0 designers is available on the market.[19]
In January 2013 the USB group announced plans to update USB 3.0 to 10 Gbit/s (1250 MB/s).[55] The group ended up creating a new USB specification, USB 3.1, which was released on 31 July 2013,[56] replacing the USB 3.0 standard. The USB 3.1 specification takes over the existing USB 3.0's SuperSpeed USB transfer rate, now referred to as USB 3.1 Gen 1, and introduces a faster transfer rate called SuperSpeed USB 10 Gbps, referred to as USB 3.1 Gen 2,[57] putting it on par with a single first-generation Thunderbolt channel. The new mode's logo features a caption stylized as SUPERSPEED+;[58] this refers to the updated SuperSpeed Plus protocol. The USB 3.1 Gen 2 mode also reduces line encoding overhead to just 3% by changing the encoding scheme to 128b/132b, with effective data rate of 1,212 MB/s.[59] The first USB 3.1 Gen 2 implementation demonstrated real-world transfer speeds of 7.2 Gbit/s.[60]
USB 3.2 was launched in 2017. The new transfer speeds boast an impressive 2.4GBps making it almost 2.5x faster than USB 3.0. USB 3.2 is only available on USB-C connectors because it utilizes extra pins that were designed for the reversibility of USB-C. The USB family naming system was updated again which differentiates between the new transfer modes.
We wanted to see if USB 3.0 lives up to its hype, and if Thunderbolt is in fact a faster alternative. So we ran a slew of tests using both spinning and solid-state drives that had a variety of interfaces and were plugged in both directly to a computer and through a USB 3.0 hub. To give the tests the best chance of success, we connected the USB 3.0 drives to a 2012 15-inch MacBook Pro with a 2.7GHz quad-core Intel Core i7 processor, 8GB of RAM, and a speedy internal SSD drive installed. We also tested USB 2.0 and FireWire 800 speeds for comparison.
Our USB 2.0 results were also very consistent, topping out at 41 MBps in each of our six tests. Interestingly, the write speeds for the files on folders tests were faster using the hubs, going from 35.1 MBps when connected directly, to about 41 MBps through the hubs.
FireWire 800 was about half as fast as USB 3.0 in our write tests, turning in scores ranging from 55 MBps and 60 MBps. The read scores were faster, though at 72.3 MBps and 74.5 MBps, they were still considerably slower than USB 3.0.
FireWire 800 results were flat compared to the hard-drive tests except for the 10GB folder write test: At 62.8 MBps, it was 7.7 MBps faster than it was with the spinning drive. Results were much faster than USB 2.0, but could not keep up with USB 3.0, which was always at least twice as fast as FireWire 800, and in the case of our 10GB file and Aja Write tests, USB 3.0 was three times as fast as FireWire 800.
Thunderbolt was much faster on these SSD tests than it was with the hard drive, and it was faster than USB 3.0 in all six tasks, though to varying degrees. It was 35 percent faster than USB 3.0 at writing our 10GB folder of files, 17 percent faster at reading those files, 14 percent faster at reading our large 10GB file, and a scant 6 percent faster at writing that file. Aja System Test showed more differences, though. The Thunderbolt-connected drive posted a write score of 355 MBps and a read score of 370 MBps, as compared to the 193.2 MBps write and 167.6 MBps read scores USB 3.0 posted using Aja System Test.
The theoretical transfer speed of USB 3.0 (or maximum bandwidth rate) is 5Gbps (gigabits per second). This speed translates into 640 MBps (megabytes per second), which is theoretically ten times faster than USB 2.0.
It wasn't until 2000 that USB 2.0 was unveiled, offering a 40 times faster data transfer speed, at 480 Mbps. Compare that to the third generation of USB, USB 3.0, which can transfer at a rate of 10 times faster still, at 4,800 Mbps. There is one more generation of USB -- USB 4 -- which was announced in August of 2019, but this technology is still not yet widely available.
It's safe to say USB 3.0 out performs USB 2.0 in every category that matters. However, it may come at a price. As you might expect, you will pay more for USB 3.0 devices than USB 2.0 devices, so it's important to figure out if you actually need the faster option for your specific application. If you're not working with a huge amount of data, there's no reason to pay extra for the faster speeds. For example, if you're ordering custom USB drives as promotional giveaways or to share a few files with employees, you may decide to prioritize budget over speed. However, USB drives for photographers are usually USB 3.0, as transferring hundreds of high-resolution images on a USB 2.0 drive would be a painstaking task.
The CPU throughput is larger than the RAM, so no it would be hardly the CPU or RAM limiting the USB interface of any kind. Even Core 2 generation CPU from close to 8 years ago can handle 32 lanes of PCIe traffic, the faster USB 3.1 interface is less than 2 lanes of PCIe traffic.
The final issue is whether the drive or interface manufacturers are using a decimal 1,000,000 for a Mega or a binary 2^12 (1,048,576) for a Mega. Manufacturers obviously prefer the decimal version because it make drives seem faster and bigger. However, the file sizes might be referring to the binry version and again will appear slower.
i use my dell laptop for my disc jockey business looking ot see if i upgrade from a usb 2.0 4 port hub to this 3.0 4 port hub will it work and will it make my stuff work better and faster can i also just plug and play with any usb port on my labtop. i have vista 32bit.thanks
While some manufacturers sell docking stations that are made for a specific computer model or family, they are becoming a rarity. An alternative is to get a generic dock, like the $350 Anker 777 Thunderbolt Docking StationRemove non-product link. Based on Thunderbolt 4, it provides a sneak preview of what to expect in the future from USB4.
> Would have been nice if the people who manage the USB specifications had insisted that the only way to be allowed approval to mark and market a storage device as USB 3.x is if it had a minimum sustained write speed faster than the maximum possible by USB 2.0.
I have a 1TB WD My Passport external HDD. It supports USB 3.0 and has an USB 3.0 cable. Whenever I connect it to my laptop, the message \"This device can perform faster. This USB mass storage device can transfer information if you connect it to a Super-Speed USB 3.0 port.\" appears even though I inserted it in my USB 3.0 port.
On the other hand, since Macs generally don't support USB 3.0, which has been out for a long time and is becoming more and more popular in the PC world, Mac users have also been missing out quite a bit. Many people are wondering which is better, Thunderbolt or USB 3.0. This is a hard question, as Thunderbolt is about more than data storage; it's also about video transport, connectivity, expandability, and synced audio. However, strictly in terms of storage applications, neither is better. Consumers should really have both. The current separation of the two standards is a lose-lose situation for Windows and Mac users alike.
Thunderbolt is slated to offer a speed of 10Gbps (which is about 1.2GBps). Real-world storage products generally offer much less than that, but still boast very fast data throughput. The Pegasus R6, for instance, is much faster than even a SATA 3 solid-state drive. And that's not a surprise, because the top speed of the SATA 3 standard, which is currently the fastest standard for an internal storage controller in a consumer-grade computer, is just 6Gbps (768MBps). 153554b96e
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