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How much faster is USB3.1 than USB3.0?
Compared to existing USB3.0 interface, nominal data transfer rate of USB3.1 interface has been doubled from 5Gbps to 10Gbps. However, can it achieve twice transmission speed of existing USB3.0 interface in real-life conditions? Foreign media AnandTech presented us with an actual test, let's see.
However, since USB3.1-based peripherals do not exist, AnandTech used an ASMedia USB3.1 development board in this test. It is equipped with an ASMedia ASM1352R controller, has two SATA6Gbps interfaces, and supports RAID0 arrays. The development board used during test is equipped with two 240 GB Intel Intel530 SSDs for maximum performance.
As for test platform, AnandTech uses an Intel Core i7-5960X ES processor (8 cores, 16 threads, 3.0 GHz base frequency, 3.5 GHz dynamic turbo frequency), 32 GB DDR4-2133 memory, and an ASUS graphics card R7 240 2 GB with video memory. map; 256GB OCZ Vertex 3 SSD; 1250 W OCZ NX power supply; MSI X99A Gaming9ACK motherboard with two Type-A ports. It is inherited from chip provided by ASMedia, uses a PCI-E2.0x2 channel, and theoretical interface bandwidth is 10Gbps. In addition, this motherboard also has a USB3.0 interface based on VIA chip extension, which is used to compare with the USB3.1 interface.
According to test results, actual performance of USB 3.1 is much better than that of USB 3.0. Continuous read and write speeds range from 500MB/s to 600MB/s, and maximum score can even exceed 700MB/s. As for USB3.0 interface, its continuous read and write speed is from 300MB/s to 400MB/s.
Even though USB3.1 interface is rated at 10Gbps, it still reserves some bandwidth to support other functions, so its actual effective bandwidth is about 7.2Gbps and theoretical speed transfer should reach 900 MB/s. Therefore, AnandTech also believes that current USB 3.1 interface still has a lot of room for improvement, at least it should reach 800MB/s.
What is USB3.1? USB3.1 is latest USB data interface specification developed by USB-IF Association. In addition to improving encoding method and increasing transmission speed, it also greatly improves power of interface. The USB3.1 interface is expected to charge devices such as tablets at same time. Its connection interface has three types: Type-A, Type-B and Type-C. It can be backwards compatible with USB 3.0 and USB 2.0 devices, and will provide USB3.1A/V audio and video transmission, support video output up to 4K at 30fps, and support audio transmission at same time.