World’s fastest SD cards hit 299MB/s write-speed according to Sony

joe1946

joe1946

Veteran
Sony has announced what it is describing as the world’s fastest SD memory cards with the launch of the new SF-G series. The three cards under the new label are capable of reading out at a rate of 300MB/s, but more significantly for camera performance they can accept data at a write speed of up to 299MB/s. Such speeds equip them to receive high resolution video as well as to cope with the new wave of extreme frame rates in DSLR and mirrorless cameras – such as that produced by the Olympus OM-D E-M1 ll.
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https://www.dpreview.com/news/2238731916

https://www.sony.co.uk/electronics/sd-cards/sf-g-series
sony-sf-g-2-medium.jpg

The new A7s III should support this card.
 
Now THATS!!! what I'm talking about. All of this proprietary card nonsense. This is where things need to go in my opinion.
 
"Up To" speeds are meaningless as far as cameras are concerned. The important factor is what is the Minimum Sustained Write Speed. That's what joe1946 is referencing with the V60, V90 references.

That Sony card does say SDXC UHS-II U3. According to the SD Card Association, that would support a minimum sustained write speed of 30 megabytes (240 megabits) per second. That's all you can really expect this new card to do. It might be able to read off to a computer faster, but as far as camera performance, 240mb/sec is all it shows it supports.

V30 supports 30 megabytes per second (240 megabits). V60 supports 60 megabytes per second (480 megabits) and V90 supports 90 megabytes per second (720 megabits).

The dpreview article even brings that up, saying:
It's interesting to note, however, that the card is still rated as U3 speed class, meaning that it's only guaranteed to be able to sustain a writing speed of 30MB/s, which is significant if you're attempting to shoot video (30MB/s is 240 Mbps). It's unclear whether this is because the card can't dependably write fast enough to earn a V60 rating or if Sony simply hasn't fully adopted the SD 5.0 standard yet.
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True North said:
Now THATS!!! what I'm talking about. All of this proprietary card nonsense. This is where things need to go in my opinion.
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That's what I'm talking about too. But would you mind elaborating what cards you call proprietary? All of the cards in use that I know about are open standards: CF, SD, CFast, XQD, and CFexpress (in order of introduction).

As for SDXC, we have reached the end of the line on that bus, which maxes out at 312 MB/sec. To go any higher, it would have to be a new bus, a new card. It could be the same shape and size, but it wouldn't be called SDXC. It would have to be called something new, like SDUC. Or we could all just move to one of the newer cards already introduced.

Or we could be content with 300 MB/sec. It's fast enough for 120 fps of raw HD --- which I'm fine with. Someone could make something like the Ikonoskop, Digital Bolex, or Pocket, that records to SDXC cards. If it has at least 60 fps, global shutter, and a body like the Canon XA20, I would be happy for a long, long time. </plea>
 
These are probably for the high frame rate stills for a high (mega) pixel sensors which require super high burst rates until the buffer fills up. It will also work for (most of) their XAVC bit rates on the consumer type cameras.

For the mid/pro tier cameras and their 4/6/8K Raw/ProRes HQ video, the options are likely to lie with some new technology (or a couple of QXD's recording in parallel ... or something).

PS. The Intel Optane X-point specs are just coming out and those may not live up to hype.
 
It's funnier when Sandisk puts it as follows on their similarly fast SDXC cards:
This card is also well-suited for video capture, including 4K, 3D, and Full HD video, and can achieve maximum read speeds of up to 300 MB/s and maximum write speeds of up to 260 MB/s. Thanks to its U3 speed class rating, minimum write speeds are guaranteed not to drop below 30 MB/s.
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Anyway, in case anybody wonders: as 5D3+RAW shooters know, uncompressed RAW 1920x1080 at 14 bits and 24 fps takes approximately 83MB/s. There are V90 SDXC cards out there already, so in theory that would be possible on SD just as it is with CF. Take it to 4k and you're at 332 MB/s, so, even if these speeds were sustained... not there yet.
 
combatentropy said:
That's what I'm talking about too. But would you mind elaborating what cards you call proprietary? All of the cards in use that I know about are open standards: CF, SD, CFast, XQD, and CFexpress (in order of introduction).

As for SDXC, we have reached the end of the line on that bus, which maxes out at 312 MB/sec. To go any higher, it would have to be a new bus, a new card. It could be the same shape and size, but it wouldn't be called SDXC. It would have to be called something new, like SDUC. Or we could all just move to one of the newer cards already introduced.

Or we could be content with 300 MB/sec. It's fast enough for 120 fps of raw HD --- which I'm fine with. Someone could make something like the Ikonoskop, Digital Bolex, or Pocket, that records to SDXC cards. If it has at least 60 fps, global shutter, and a body like the Canon XA20, I would be happy for a long, long time. </plea>
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Samsung has the new UFS cards coming that have SSD performance.

http://www.anandtech.com/show/10475...-ufs-cards-ssd-performance-in-card-formfactor
 
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