Though the UHS-I specification, which described the means to create SD memory cards that can work at speeds of up to 104 MB/s, wasn't released overly long ago, the SD Association has revealed that the SD 4.0 specification will describe a new design capable of reaching all the way up to 300 MB/s.

According to the official press release issued by the SD Association, the SD 4.0 specification is promising much higher speeds than those currently achievable.

The main asset that will enable the aforementioned data rates of 300 MB/s will be a new, dual-row pin memory card design.

This new design will be applicable to SDHC and SDXC cards, as well as their microSDHC and microSDXC variations.

This design is, of course, still under development and, even while boosting speeds to that level, will retain backwards compatibility.

"Our innovative dual-row pin design ultimately lets consumers using equipped products to manage the massive storage capacity found on SDXC memory cards at incredible speeds," said Norm Frentz, chairman of the SD Association.

"SD can now support high definition video from Hollywood movie studios, television broadcasts, or HD videos taken on your latest vacation,” Frentz added.

“SD is a very popular, extremely portable and easy-to-use storage medium that has enhanced the enjoyment and portability of music, photos and data. The Association remains committed to helping consumers maintain the value, usefulness and longevity of all of their SD products," he went on to saying.

Cards constructed with dual-row pins will retain the size and shape currently employed by this type of very small form factor storage solution.

The SD 4.0 Specification will be released during the early pats of 2011. In the meantime, consumers will be able to enjoy the variety of existing cards, some new models having even been unveiled at IFA 2010, in Berlin.