I-UHS SDXC Cards / Image Source: Engadget

SDXC memory cards are capable of theoretical read/write speeds of up to 300 megabytes per second. But we know not many of the SDHC cards could achieve their theoretical maximum. The SD Association has unveiled the UHS-I specification for SDXC and SDHC cards capable of transferring data at up to 104 megabytes per second. This will enable HD video recording in real time.

See Also:

• SD Association to Introduce 300 MB/sec Backwards Compatible SDHC, and SDXC Memory Cards
• Panasonic Release Fast New 8GB & 16GB UHS-I SDHC Memory Cards
• SD Memory Cards: Our Pick of the Most Reliable Cards
• 64GB Memory Cards Hit the High Street
• Which Memory Card Do I Need for My HD Camcorder?