• SD Express is a new Memory Card with NVMe and PCIe
    15 replies, posted
https://www.techpowerup.com/245534/sd-express-is-a-new-memory-card-standard-that-leverages-pcie-and-nvme transfer speeds of 985MB/s Max capacity of 128 TB still works with every other SD card reader ever (larger sizes and faster speeds may not work)
This'll really only be good for high end cameras and high-speed recorders. SD Cards typically don't have the best reliability or wear leveling compared to a proper NVMe/SATA SSD.
This is great for anything portable. Theres a lot of tablet pcs that use sd cards as added storage.
This is gonna go missing easy af
It should help out with SBCs that rely on SD cards for storage/booting, too.
Provided that newer smartphones incorporate a PCIe/NVMe controller. AFAIK there's no consumer grade flagship smartphone on the market currently that even has the basic infrastructure built-in for PCIe/NVMe. Most internal phone storage is just Quad SPI base for interfacing.
Hopefully it improves the random read/write throughput as much as it improves the sequential read/write throughput.
Ooh, very nice. Looks like all non-volatile storage will soon be using PCIe lanes at this rate. One step closer to universal memory!
Waiting for the day that my PC is just a brick where all internal ports are m.2 slots of various protocols and all external ports are TypeC ports/TB.
It does seem like things are getting more consolidated, doesn't it? It's gotten to the point where a Mini-ITX motherboard has all the stuff I need for my next PC build, and I can easily see the legacy-free motherboards of ten years from now having nothing but USB-C/TB3 (or whatever their successors are) for the rear I/O. After all, even some laptops nowadays have nothing but USB-C, even in place of a dedicated power jack.
Let me tell you about true universal memory (if we could ever get either technology dense enough): FRAM or MRAM.
is there any reason in particular you wouldn't want to use something like this for desktop storage and daily use?
Theoretically I guess there's nothing stopping you on the technical level. It being on PCIe means you're gonna have even faster access speeds than SATA, and a theoretical limit of 128TB means there shouldn't be a storage problem once storage density advances enough. The problem is price. Even a 512GB SD card will run you around $250 at the moment according to Newegg. For that kind of cash you can get a several-terabyte WD Gold mechanical drive that's built to last for a decade or more. We're not going to see SD cards with "Steam library" capacity any time soon, especially not at a price that would be wildly out of reach for consumers.
Most importantly what will be the write endurance of these SD cards? At the moment it's my understanding that SD cards have a lesser write endurance than an SSD.
I don't think it's really intended to replace SSDs.
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