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RE: UHS-1 SD Cards

Posted by AbeCollins (A) on June 22, 2015 at 10:14:06

In Reply to: UHS-1 SD Cards posted by fmak on June 22, 2015 at 07:23:05:

UHS-1 defines bus-interface speeds up to 104 Megabytes per second (not 100 Megabits per second as you posted). That's an order of magnitude off. If your SD slot is not UHS compatible there will be no benefit to using the faster card. It may not work at all.

Does your Windows 8.1 computer have a UHS-1 compatible SD slot?

And like it or not, these cards are designed for fast large block sequential I/O which is well suited for large files produced by digital still cameras and digital video cameras.

In layman's terms, even if your slot is UHS compatible, your operating system i/o is generally characterized by small random i/o, a lot of it in RAM.

Will you see a performance gain?

For operating system use, probably not much. For backup, probably some.

However, I would never consider using any of these cards for reliable backup or archiving of important data. They do not have the same over provisioning, wear leveling, and reliability of other flash memory implementations (like SSDs)

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