Lexar has introduced it’s presently creating a brand new line of SD Categorical and microSD Categorical playing cards, regardless of no digital camera presently supporting the usual.
The playing cards, which use the SD 7.0 specification (PCIe 3.1 x 1 lane), will provide learn and write speeds of 824MB/s and 410MB/s, respectively. The utmost bandwidth for the playing cards is 985MB/s, almost triple that of the present UHS-II SD and microSD playing cards. This growth additionally suggests Lexar (and, maybe, the entire business) is skipping everything of the UHS-III interface and going straight to PCIe/NVMe: the identical interface CFexpress playing cards use.*
Lexar says the brand new SD Categorical and microSD Categorical playing cards might be constructed on Silicon Motion’s SM 2708 controller and are backwards appropriate, albeit with a serious caveat. The controller contained in the SD Categorical and microSD Categorical playing cards is proscribed to UHS-I speeds (SD 6.1 as much as V30, U3), even when utilized in UHS-II card slots. So, despite the fact that these will technically work with cameras that help UHS-II class SD playing cards, you’ll solely get UHS-I speeds (100MB/s).
As for capability, Lexar notes the SD Categorical playing cards will are available capacities as much as 512GB whereas the microSD Categorical playing cards will prime out at 256GB.
It’s an fascinating transfer from Lexar. The press launch saying the event particularly references the photographic and video capabilities of those playing cards, however because it stands there’s nothing in the marketplace that helps them. Might Lexar know greater than we do when it comes to what card codecs future cameras will use? Probably, but it surely is also a wager that the recognition of the SD format (and identify) will prevail over the likes of CFexpress playing cards, at the very least for the majority of the market.
CFexpress Kind-B playing cards utilized by Canon, Nikon and Panasonic for now promise better pace, because of their two-lane design, however Lexar’s SD Categorical playing cards needs to be a match for the smaller CFexpress Kind-A playing cards presently solely utilized by Sony, risking one or the opposite format ending up as one other Reminiscence Stick or xD-style developmental dead-end. The SD Affiliation has already set out a quicker two-lane PCIe 4.0 specification, that would provide CFexpress Kind-B ranges of efficiency, although it will not essentially provide the identical capacities or ranges of sturdiness that the bigger CFe playing cards can provide.
Regardless of the case, we should always know quickly sufficient, as Lexar says it’s planning to launch the lineup in 2022.
* In principle, these playing cards may very well be appropriate with Sony cameras that help CFexpress Kind A, as they use the single-lane PCIe 3.0 interface. However there may very well be different components at play effecting compatibility. We now have contacted Sony for info as as to whether or not a future firmware might, at the very least in principle, make these playing cards appropriate with Sony CFexpress cameras.