USB2.0 vs. USB3.0
USB, an integrated Universal Serial Bus (USB) interface, is a data storage device that includes flash memory. They are typically removable, rewritable and physically smaller than an optical disc with less than 30 grams in weight. They are often used for the same purposes as floppy disks or CDs were used, i.e., for storage, back-up and transfer of computer files.
Most of the USB flash drives have USB2.0 connectivity with a hi-speed specification of 480 Megabit per second (Mbit/s) i.e., 60 Megabytes per second (MB/s). And USB3.0 offers an improved data transfer rates up to 5 Gbit/s (625 MB/s), which theoretically more than ten times faster than USB2.0. All USB3.0 devices are backward compatible with USB2.0 ports. Computers with USB3.0 ports are becoming common, very popular and newer laptops / desktops have at least one USB3.0 port and generally they're colored blue inside.
In above picture, the port at left is USB2.0 and right side port, colored blue, is USB3.0. USB3.0 port expansion cards are available to upgrade older systems, and many newer motherboards has two or more USB3.0 jacks.
We should have to know 'how USB3.0 flash drives actually perform in real world!' Are they, really, faster than USB2.0 drives? Bear in mind that these performances are depend on the specific drive.
Go tom's 2013 hardware charts for USB3.0 and check out their test of charts, which revealed speed of scores (in MB/s) for 2013.
For USB3.0 drives they tested from 11.4 MB/s to 286.2 MB/s.
For USB2.0, showing at the bottom of the chart, between 7.9 MB/s to 9.5 MB/s.
So, there was a huge speed variation between the both. The worst USB3.0 drive is faster than USB2.0, with only by a tiny bit. The best USB3.0 drive is 28 times faster. The prices also seem cheapest to the slowest drives, while the faster ones are expensive.
The fastest drives seem to achieve its speed by using 4 channels flash memory instead of single one. So, USB3.0 allows faster transfer speed, but not every drive will take the same advantage with other factors such as flash memory speed, inside the drive, is critical.
Never believe the speed rates quoted by the manufacturers, as they're often provide exaggerate numbers to mislead. Fake USB flash drives are sometimes sold, claiming to have higher capacities than they actually have. These are typically low capacity USB drives that are modified as to emulate larger capacity (e.g., a 2 GB drive being marketed as an 8 GB drive). When plugged into a computer, they report themselves as being the larger capacity as they were sold, but when data is written on them, either the write fails; the drive freezes up, or it overwrites existing data.
Many types of USB devices wouldn't perform a fast process even it's USB3.0. It's clever not to pay extra amount to the devices, in which you may plug USB2.0 devices into USB3.0 ports, too.
We should have to know 'how USB3.0 flash drives actually perform in real world!' Are they, really, faster than USB2.0 drives? Bear in mind that these performances are depend on the specific drive.
Go tom's 2013 hardware charts for USB3.0 and check out their test of charts, which revealed speed of scores (in MB/s) for 2013.
For USB3.0 drives they tested from 11.4 MB/s to 286.2 MB/s.
For USB2.0, showing at the bottom of the chart, between 7.9 MB/s to 9.5 MB/s. So, there was a huge speed variation between the both. The worst USB3.0 drive is faster than USB2.0, with only by a tiny bit. The best USB3.0 drive is 28 times faster. The prices also seem cheapest to the slowest drives, while the faster ones are expensive. The fastest drives seem to achieve its speed by using 4 channels flash memory instead of single one. So, USB3.0 allows faster transfer speed, but not every drive will take the same advantage with other factors such as flash memory speed, inside the drive, is critical.
Never believe the speed rates quoted by the manufacturers, as they're often provide exaggerate numbers to mislead. Fake USB flash drives are sometimes sold, claiming to have higher capacities than they actually have. These are typically low capacity USB drives that are modified as to emulate larger capacity (e.g., a 2 GB drive being marketed as an 8 GB drive). When plugged into a computer, they report themselves as being the larger capacity as they were sold, but when data is written on them, either the write fails; the drive freezes up, or it overwrites existing data.
Many types of USB devices wouldn't perform a fast process even it's USB3.0. It's clever not to pay extra amount to the devices, in which you may plug USB2.0 devices into USB3.0 ports, too.
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