[SunnyG.]

Just saw this! Blew my mind! The application for this would be endless! Camera companies are yet to adopt UHS-III, and now this! The rate of adoption and implementation way slower than the rate of innovation! Maybe this will be geared more towards video graphers . Has anyone else seen this?

[stevebrot]

Has anyone else seen this?

The SD Express Bus was announced June of this year and uses the PCIe interface to attain the amazing speed. Legacy support is required for UHS-1 bus and High Speed bus, but at speeds appropriate to those specs.

https://www.sdcard.org/press/thoughtleadership/180705_Change_for_the_Better_...D_Express.html


Steve

[Digitalis]

That is the theoretical speed of the interface, there are a lot of bottlenecks that will have to be eliminated or broadened before we see anything near that kind of performance.

[surfar]

The CF Express is coming maybe later this year or early next year as well....i wonder if the Pentax cameras will progress to need this sort of thing?

[SunnyG.]

The SD Express Bus was announced June of this year and uses the PCIe interface to attain the amazing speed. Legacy support is required for UHS-1 bus and High Speed bus, but at speeds appropriate to those specs.

Articles by Our Experts - SD Association


Steve

Btw does it use pcie1.0 interface? As far as I know PCIe 2.0 and 3.0 and PCIe provides much higher speeds! And why didn't they use SATA express interface? It is really fast as well. 10GBps to be exact. Also the SATA interface is much more established, although it's slower than PCIe. But still 10GBs is really fast!

---------- Post added 09-03-18 at 11:38 AM ----------

That is the theoretical speed of the interface, there are a lot of bottlenecks that will have to be eliminated or broadened before we see anything near that kind of performance.

What are the bottlenecks? Can you elaborate?

[SunnyG.]

The CF Express is coming maybe later this year or early next year as well....i wonder if the Pentax cameras will progress to need this sort of thing?

Look at this!

[stevebrot]

Btw does it use pcie1.0 interface? As far as I know PCIe 2.0 and 3.0 and PCIe provides much higher speeds! And why didn't they use SATA express interface? It is really fast as well. 10GBps to be exact. Also the SATA interface is much more established, although it's slower than PCIe. But still 10GBs is really fast!

Click through and read the article for the implementation details. As for the "why not" questions, the article's author, Yosi Pinto, added his e-mail address at the end for comment/questions. (BTW, Mr. Pinto is Director of Standards at SanDisk and Chairman of the SD Association board.)


Steve

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Last edited by stevebrot; 09-03-2018 at 02:02 PM. Reason: completeness

[surfar]

Look at this!

Yes, i saw that a few days ago.Its easy to understand why Nikon has gone that direction now.

[Rico]

The XQD cards are already using PCIe. SD Association moving towards PCIe is a game changer for SD cards. Moving to PCIe will eliminate a major hurdle to the bottlenecks.

[Digitalis]

What are the bottlenecks? Can you elaborate?

The memory cell architecture itself, controller clock speeds and number of bus lanes, the amount of crosstalk between individual channels, Thermal throttling*...It is better than IDE or SATA but there is still a lot going on with the PCIe interface.


* E.g Computer graphics cards equipped with GDDR6 can obtain a theoretical maximum of 128gb/s - however with a TDP [Thermal Design power] of over 350W [ for overclocked cards] all that heat has to be dumped somewhere otherwise the card will underclock itself, limiting it's performance.