Next-Gen SD Cards Set To Achieve Top Speed Of 2GB/s
Next-Gen SD Cards Set To Achieve Top Speed Of 2GB/s
SD Association, the body overseeing the specification of the SD cards, has recently announced the SD Express version 9.1 specification that mantades memory cards abiding to this standard must be connected via PCIe 4.0 x1 connection. This protocol provides a theoretical maximum bandwidth of around 2GB per second, doubles the previous standard which used the preceding PCIe 3.0 x1 protocol.
The new standard also introduces a new name, “SD Express Speed Class”, to the next-gen memory cards. These range from Speed Class 150 to 600, splitting into four tiers – the number represents both the read and write speeds (so 600 means 600MB/s read and write, for example).
Aside from that, the SD Express 9.1 standard also covers power management and heat dissipation features. Exactly how this is implemented is not entirely clear, though it should involve SD card readers integration some sort of temperature sensing and passive cooling designs to accommodate the extra heat involved in ever-higher speeds involved.
In the future, there’s also plans to push the speeds even further by adopting PCIe 4.0 x2 standard, which pushes the maximum bandwidth up to 4GB/s. That said, it’ll be some time away before SD cards of this speed enters the market.
Source: PCWorld
Pokdepinion: This should pave the way for even higher resolution video recording on mirrorless cameras, which demands plenty of bandwidth.
