XQD card

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XQD card
Media type Memory card
Capacity over 2 TB
Developed by CompactFlash Association
Dimensions 38.5 mm × 29.8 mm × 3.8 mm
Usage Digital cameras

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 photo cameras. It offers target read and write speeds from 1 Gbit/s (125 Mbyte/s) to about 4 Gbit/s (500 Mbytes/s)[1] and storage capabilities beyond 2 TB.[2]

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.[3] The final specification was announced in December 2011.[4][1]

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).[5]

Availability[edit]

In January 2012, the first XQD card was announced by Sony, declaring a 1 Gbit/s read and write speed.[6][7] In July 2012, Lexar announced plans to support the XQD format.[8] Currently, Sandisk and Kingston have not announced plans to produce XQD cards[9][10]

Sony has also 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 a DSLR consumer technology, however, the cards will support acquisition in the broadcast quality HD422 50 Mbit/s. On 4 September 2013, they released the PXW-Z100, a 4K prosumer camera that records onto XQD cards. [11]

The Nikon D4 and its successor the Nikon D4s, are the only DSLR cameras to support the XQD format,[12][13] although a Compact Flash UDMA is also provided (dual slots).

See also[edit]

References[edit]

  1. ^ a b "CompactFlash Association readies next-gen XQD format, promises write speeds of 125 MB/s and up". Engadget. Retrieved 2012-09-19. 
  2. ^ "CompactFlash Association Announces the Recently Adopted XQD(TM) Specification as a New Memory Card Format". CompactFlash Association. 7 December 2011. Retrieved 17 January 2012. "Actual Write Speeds Target 125 MB/sec and Higher" 
  3. ^ "Sandisk, Sony, and Nikon propose 500 Mbps memory card with more than 2 TB capacity". Engadget. Retrieved 2012-09-19. 
  4. ^ "CompactFlash Association Announces XQD Card Format". Compactflash.org. 2011-12-07. Retrieved 2012-09-19. 
  5. ^ "The CompactFlash Association Invites Participation on XQDTM 2.0 — The CompactFlash Association". Compactflash.org. 2012-09-15. Retrieved 2012-09-19. 
  6. ^ "Sony Announces World's First XQD Memory Cards". Retrieved 2012-01-08. 
  7. ^ http://presscentre.sony.co.uk/content/detail.aspx?NewsAreaId=2&ReleaseID=7201
  8. ^ "Lexar Announces Support for XQD Memory Card Specification". Retrieved 2012-07-12. 
  9. ^ "Sandisk, Lexar, Kingston not making new XQD cards". Retrieved 2012-01-25. 
  10. ^ Shankland, Stephen (2012-01-13). "SanDisk on new XQD memory card format: 'Meh'". CNET. Retrieved 2012-01-25. 
  11. ^ "Sony XDCAM Micro site". Sony. 2013-09-04. Retrieved 2013-09-03. 
  12. ^ "Nikon announces first camera to use new XQD cards". arstechnica.com. 2012. Retrieved 2012-01-07. 
  13. ^ "When There Is No Second Chance: The New Nikon FX-Format D4 Multi-Media Digital SLR is The Definitive Unification Of Speed And Precision « Nikon Pressroom" (Press release). Nikon Inc. 2012. Retrieved 2012-01-07. 

External links[edit]