USB3.0 Technical Detailed

USB3.0 a significant increase in transmission speed, it is based on Full-duplex data Transfer Protocol, the theoretical transmission rate of up to 5gb/seconds (ie, 625mb/seconds), the actual data transmission rate will be up to 3.2gb/seconds (that is, 400mb/seconds), compared to the USB2.0 era has nearly 10 times times the upgrade.

In view of the trend of increasing power consumption of mobile devices, USB3.0 also enhanced the power supply function. Its hard drive to start the current requirements of the phenomenon caused by the failure of the correct recognition will no longer exist. Increased power supply means higher power consumption, so USB3.0 is adding more power management mechanisms. Ability to support standby, Hibernate, and suspend status to ensure that the device can minimize power consumption when idle.

USB3.0 maintains a backward-compatible feature for USB2.0, but is limited to a-type interface in 3 of interfaces. The other B-type interface as well as the MicroB-type interface, have adopted a new shape scheme, so can not be compatible with the USB2.0 era of "square Mouth" and "Mini" mouth. At present, we are more common on the motherboard or notebook computer USB3.0 more use a-type interface, manufacturers use the blue callout to USB2.0 and other interfaces to distinguish.

As a new thing, the current application environment is not mature, how to choose their own USB3.0 equipment, has become a puzzle for many users. First look at the motherboard, as Intel's eHCI1.0 version specification is open soon, the current mainstream chipset products on the market are not yet able to provide native support for USB3.0, only by attaching a separate USB3.0 control chip on the motherboard to provide the USB3.0 interface. The motherboard manufacturer represented in Gigabyte has already started to provide the USB3.0 interface through this method in the P55 chipset's products, but earlier motherboards can only obtain the USB3.0 interface by using a Third-party expansion card.

Standard USB3.0 USB flash drive Interface

At present the common USB3.0 control chip mainly by NEC, Granville Sheng, Asmedia (Cheung Shuo Technology) and frescologic several manufacturers. One of NEC's "PD720200" control chip is the world's first through the USB-IF official certification of the main control chip, is the most widely used, compatibility of the best products. In Gigabyte, ASUS and other high-end motherboards can see the main control of the figure. And Asmedia, the main control because the cost is relatively low and in the two or three-line brand board is more common. Frescologic's fl1000g and subsequent FL1009 are less widely used and are mainly concentrated on the three-tier brand motherboards.

NECUSB3.0 Main control chip

Apart from the main control chip, we should also focus on the motherboard of the South Bridge. Because the full speed USB3.0 interface is based on the pci-e2.0 data channel, the intel® P55 chipset and the AMDSB750 South Bridge provide only pci-e1.0 channels and do not fully perform the USB3.0 interface's speed advantage. Taking NEC's PD720200 master as an example, the velocity loss at the pci-e1.0 interface is nearly 30%. Therefore, choosing the right motherboard chip is an important link to ensure that USB3.0 can fully play its performance. If you choose the Intel platform is recommended to select the latest release of the 6 series chipset products, and the choice of AMD platform is slightly wider, based on SB800 and later models of the South Bridge chip can provide pci-e2.0 channel.

Windows7sp1. But the current WINDOWS7 operating system, still need the user installs the driver manually to be able to use the USB3.0 interface normally.

Many outstanding features so that countless users are waiting for USB3.0, but still immature application environment or make a lot of users choose the cash approach. With the USB3.0 interface of the outside equipment springing up, whether the USB3.0 equipment is worth the ordinary user to buy? is the performance improvement indicated in the specification nearly 10 times times achievable? Is it compatible with traditional USB2.0 devices? A number of questions have plagued many consumers.

Test system hardware Platform

On the hardware device, we selected gigabyte P67A-UD3R hard disk box products, we will use the same hard drive to test the speed difference between the two.

In the HDTuneProv4.60 software test, the performance of the USB3.0 interface is very good, and the performance of the SATA interface directly with SSD is basically the same. The measured read rate is up to 196.8mb/s and the write rate is up to 143.9mb/s. In contrast, the reading and writing speed of USB2.0 interface is only 33.3mb/s and 30.8mb/s, the gap is obvious. Using hdtachRWv3.0.1.0 software for testing, the results are basically similar.

In the compatibility test, we use the USB3.0 interface that supports USB2.0 MB668US-1SB access to the motherboard, and the test scores are basically no different from the Access USB2.0 interface. When the MB668U3-1SB that supports USB3.0 is plugged into the USB2.0 interface, its test scores fall significantly, but slightly higher than the test results of the USB2.0 device.