Speed
Currently, there are 3 speed modes defined by the latest USB 3.0/USB 3.1 Gen 1 specification. They are Super-Speed, Hi-Speed and Full-
Speed. The new SuperSpeed mode has a transfer rate of 4.8Gbps. While the specification retains Hi-Speed, and Full-Speed USB mode,
commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480Mbps and 12Mbps respectively and are kept to
maintain backward compatibility.
USB 3.0/USB 3.1 Gen 1 achieves the much higher performance by the technical changes below:
•
An additional physical bus that is added in parallel with the existing USB 2.0 bus (refer to the picture below).
•
USB 2.0 previously had four wires (power, ground, and a pair for differential data); USB 3.0/USB 3.1 Gen 1 adds four more for two pairs
of differential signals (receive and transmit) for a combined total of eight connections in the connectors and cabling.
•
USB 3.0/USB 3.1 Gen 1 utilizes the bidirectional data interface, rather than USB 2.0's half-duplex arrangement. This gives a 10-fold
increase in theoretical bandwidth.
With today's ever increasing demands placed on data transfers with high-definition video content, terabyte storage devices, high megapixel
count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps
theoretical maximum throughput, making data transfer at around 320Mbps (40MB/s) — the actual real-world maximum. Similarly, USB
3.0/USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world maximum rate of 400MB/s with overheads. At this
speed, USB 3.0/USB 3.1 Gen 1 is a 10x improvement over USB 2.0.
Applications
USB 3.0/USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where USB
video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's easy to imagine
that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link DVI requires almost 2Gbps
throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps speed, the standard will find its way
into some products that previously weren't USB territory, like external RAID storage systems.
Listed below are some of the available SuperSpeed USB 3.0/USB 3.1 Gen 1 products:
•
External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives
•
Portable USB 3.0/USB 3.1 Gen 1 Hard Drives
•
USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters
•
USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers
•
USB 3.0/USB 3.1 Gen 1 Solid-state Drives
8
Technology and components
Содержание Chromebook 3400
Страница 1: ...Dell Chromebook 3400 Service Manual Regulatory Model P101G Regulatory Type P101G001 ...
Страница 15: ...2 Pry the base cover from the edge using a plastic scribe 1 2 Removing and Installing 15 ...
Страница 18: ...2 Tighten the 11 captive screws to secure the base cover to the computer 18 Removing and Installing ...
Страница 21: ...5 Pry the battery from the bottom edge 1 and remove the battery from the computer 2 Removing and Installing 21 ...
Страница 26: ...4 Unroute the cable from retention clips in the routing channel 26 Removing and Installing ...
Страница 27: ...5 Lift the speakers away from the computer Removing and Installing 27 ...
Страница 28: ...Installing the speakers Steps 1 Place the speakers into the slots on the computer 28 Removing and Installing ...
Страница 29: ...2 Reroute the speaker cable through the retention clips in the routing channel Removing and Installing 29 ...
Страница 44: ...3 Press the keyboard until it clicks into place and then turn the system 1 2 44 Removing and Installing ...
Страница 100: ...1 Click the status area in the lower right corner where your account picture appears 100 Troubleshooting ...
Страница 101: ...2 Click Settings as highlighted from the screenshot below Troubleshooting 101 ...
Страница 102: ...3 Click Show advanced settings to expand the menu 102 Troubleshooting ...
Страница 103: ...4 Click the Powerwash button Troubleshooting 103 ...