What is XQD
The XQD Specification is the latest memory card format publicly released by the Compact Flash Association on December 7th, 2011. The XQD memory card will exceed speeds of the most advanced current memory card types like Secure Digital UHS-I and UDMA enabled CompactFlash.
XQD Card Features & Specifications
Utilizing an advanced PCIe interface to guarantee unprecedented speed and performance, XQD technology is capable of theoretical speeds up to 2.5Gbps today, with the ability to reach 5Gbps in the future, as noted by the CFA. Actual transfer rates amount to roughly 125MB/s read and write. Offering a robust build and optimized form factor (38.5H x 29.8W x 3.8D mm), the XQD memory card closely resembles the SD card in height & width and CF card in depth.
The XQD Specification is optimized for high end DSLRs and camcorders for professional HD video recording without dropped frames. The Nikon D4, currently the only compatible host on the market,* features a 16.2 megapixel sensor, full HD1080p recording and 10fps for shooting continuously. Launched January 6, 2012, this digital SLR model includes memory slots for both CompactFlash and XQD cards.
*Data valid as of January 27, 2012
What is VPG?
Also introduced December 7th, 2011, the Video Performance Guarantee (VPG) Specification guarantees “sustained capture of video streams at up to 20MB/s for professional video capture,” as stated by the CFA. Products marked with the VPG logo (pictured to the right) indicate superior quality recording capability across file system updates and over several capture files, while eliminating the risk of dropped frames. The VPG Spec also permits sophisticated recording functions in HD 1080p mode, such as under and over cranking. Compliant video cameras and CompactFlash cards are currently shipping.