kingston.com/ash
Flash Storage Device Performance
Flash card storage device performance depends on the following three factors:
• The specic Flash memory chips used: Generally, there is a tradeoff between the
high-speed and more expensive Single-Level Cell (SLC) Flash chips, and the standard
speed and more affordable Multi-Level Cell (MLC) or Multi-Bit Cell (MBC) Flash chips.
Kingston’s high-performance Flash cards (Elite Pro/Ultimate) and DataTraveler II
Plus – Migo Edition, and Secure / Secure – Privacy Edition USB Flash drives all utilize
high-performance SLC Flash memory.
• The Flash storage device’s controller: Today’s Flash storage devices have a built-in
Flash memory controller. This special chip manages the interface to the host device,
and handles all the reads from and writes to the Flash chips on the Flash storage device.
If the host controller is capable of supporting faster data transfer speeds, the use of
optimized Flash controllers can result in signicant time savings when reading or
writing data into the Flash memory. For example, Kingston uses optimized,
high-performance Flash controllers in its Elite Pro/Ultimate Flash cards and DataTraveler
Hi-Speed USB Flash drives.
• The host device to which the Flash storage device is connected to: If the host device
(computer, digital camera, cell phones, etc.) is limited to specic read and write speeds,
using faster Flash storage devices will not deliver higher performance. For example, using
a Hi-Speed USB Flash drive on a computer that supports only the slower USB speeds
will not result in faster transfers. In addition, computers need to be properly congured to
support faster transfers in both hardware and software. In the case of a PC, the system
board will need to have built-in Hi-Speed USB 2.0 connectors, and the Operating System
(e.g., Windows) will also need to have the proper USB 2.0 drivers installed in order to be
able to support Hi-Speed USB transfers.
For details on USB Performance, refer to Appendix A.
Flash memory product manufacturers provide “x-speed” ratings for Flash cards. However,
due to a lack of industry standards, comparing different Flash products may prove difcult for
consumers. For details, see kingston.com/flash/x
Kingston works closely with global semiconductor and controller manufacturers to
ensure that Kingston Flash cards deliver superior price/performance to its customers. For
enthusiasts and advanced customers demanding the highest performance, Kingston offers
the Elite Pro/Ultimate line of CompactFlash and SD cards, and the DataTraveler Hi-Speed
USB Flash drives.
USB Flash drives offers
an easy way to transfer
les from a digital device
to a computer.
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