We measured the Toshiba UHS-II at 96MB/s read and 92MB/s write performance in UHS-I mode. Also consider the Toshiba Exceria Pro UHS-II card, which is able to provide UHS-II speed in addition to UHS-I SDR104. Compare this with the SanDisk Extreme Pro 95MB/s UHS-I card that performs up to 98MB/s read and 92MB/s write in UHS-I mode. In UHS-I readers, the maximum sequential read speed we recorded was 48 MB/s, while maximum write speed was 46 MB/s. However it does not support the fastest SDR104 (104MB/s bus speed) variant it is limited to 50MB/s bus speed. In UHS-I card readers that do not support UHS-II, the Extreme Pro UHS-II reverts to UHS-I performance.
There was a significant increase in USB 3.0 performance after updating from Windows 7 to Windows 8. The fastest sequential write speed reached 230.9 MB/s.Ĭomputer hardware, drivers and operating system need to be up to date to experience the best performance. After testing the card is several UHS-II readers, the highest read speed benchmark was 279.3 MB/s. Since the initial review, additional UHS-II card readers have been released. They were the SanDisk Extreme Pro UHS-II Reader, the Kingston MobileLite G4 and the Panasonic Micro P2 reader. When the card was introduced only a few readers were UHS-II enabled. Measuring the speed potential of the Extreme Pro UHS-II card requires a UHS-II enabled card reader.
A UHS-II card reader connected through a USB 3.0 connection can provide over 200MB/s actual transfer speed. Even if you don't have a UHS-II camera yet, you can still take advantage of the fast download speed UHS-II can provide. Some recent Panasonic video cameras use microP2 which is the same format as UHS-II.
See the updated list of cameras that support UHS-II for current cameras. As of November 2014, the only digital cameras to support UHS-II are the Fuji X-T1 and Samsung NX1 (announced September 2014). Who should consider UHS-II cards? Primarilly those who have UHS-II devices. The Extreme Pro UHS-II is available in 16, 32 and 64GB capacities. UHS-II cards are reverse compatible with standard SD and UHS-I capable devices, but will operate at lower speed. UHS-II cards have a second row of contacts to provide a 4-lane bus and operate at a maximum 312 MB/s speed. The SanDisk Extreme Pro 280 MB/s UHS-II SD card uses the new UHS-II interface to provide the fastest SD memory card to date. SanDisk Extreme Pro 280MB/s 32GB UHS-II SDHC Memory Card Introduction
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