XQD card is a memory card format primarily developed for flash memory cards. It uses PCI Express as a data transfer interface.
The new format is targeted at high-definition camcorders and high-resolution digital cameras. It offers target read and write speeds from 1 Gbit/s (125 Mbyte/s) to about 4 Gbit/s (500 Mbytes/s) and storage capabilities beyond 2 TB.
The cards are not backward compatible with CompactFlash or CFast cards. XQD and CFast were both designed as a replacement of the then-16-year-old (in 2010) CompactFlash standard.
The format was first announced in November 2010 by SanDisk, Sony and Nikon, and was immediately picked up by the CompactFlash Association for development. The final specification was announced in December 2011.
XQD version 2.0 was announced in June 2012, featuring support for PCI Express 3.0 with transfer rates up to 8 Gbit/s (1000 Mbyte/s).
Video XQD card
Availability
In January 2012, the first XQD card was announced by Sony, declaring a 1 Gbit/s read and write speed. In July 2012, Lexar announced plans to support the XQD format. In June 2017, Micron announced it was discontinuing the Lexar brand. This leaves Sony as the only XQD manufacturer. Currently, SanDisk and Kingston have not announced plans to produce XQD cards.
Maps XQD card
Hosts
Sony has said their broadcast camcorders (XDCAM and XDCAM EX) will support the XQD cards. For their broadcast products the XQD card will be classified as a secondary media as XQD is based around consumer technology. Nonetheless, the cards will support acquisition in the broadcast quality MPEG HD422 50 Mbit/s format. On 4 September 2013, Sony released the PXW-Z100, a 4K prosumer camera that records onto XQD cards.
Nikon supports XQD cards in its newer high-end DSLR cameras: Nikon D4, Nikon D4s, Nikon D5, Nikon D850 and Nikon D500.
Successor
At 7 September 2016, the CFA announced the successor of XQD, CFexpress. This new standard uses the same form-factor and interface but uses the NVMe protocol for higher speeds, lower latencies and lower power consumption.
See also
- CFast
- CFexpress
- Comparison of memory cards
References
External links
- CompactFlash Association
Source of article : Wikipedia
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