5d markiii officially wont use SDHC UHS-1?

[Sinsear]

Even if the camera doesn't specifically support UHS-I, it'll still make a difference. Here's a review for the SanDisk Extreme Pro 95MB/s SDXC 64GB card on B&H:

"My testing:
5GB Blackmagic file R/W test (limited by my Clevo laptop's card reader) 76MB/s read, 72MB/s write.

In my 60D:
Previous Sandisk card has 45MB/s read, 41MB/s write. This allowed a burst of 8x continuous shots @ 5.3 shots per second, then 1 shot per second thereafter capturing RAW+JPG each shot, ie 33MB per shot. (will also allow 50x shots continuous JPG only).

But, this new 90MB/s Write card has transformed my 18Mpix CANON 60D camera. Allows 8x RAW+JPG shot initial burst, then a just perceivable pause (eg 0.25sec), then another 6x RAW+JPG shot burst before slowing down. Effectively 14x RAW+JPG shot continuous bust now = 460MB captured to the camera's buffer just in 3.5 seconds ! This is a huge improvement. And the camera is ready for another shorter burst after another second pause. I had found the 8x shot burst limiting for kids sports.

18Mpix RAW only – now is 15x shot continuous burst (no pause) before slowing down.

VIDEO: The change here is the recovery time when banging of still shots during video. The cycle time is much shorter and little of the video is lost now (was typically 1sec of video lost – intrusive for sports).

From 8x shot burst (also CANON's specs) to 15x shot burst."

I have personally confirmed this fact when using my 60D with the card aforementioned in the review. On a slightly different note, I also have a Lexar Professional line SDXC card (LSD64GCRBNA133), and even though it's guaranteed to have a min. write speed of 20MB/s, my 60D stutters like crazy while recording video and randomly stops while recording. The number of RAWs it can burst is also quite inferior. I also have a Transcend photo SDHC card, and it too can't hold a candle to SanDisk (and they were all expensive cards, none of them were $30 cards from Walmart). From personal experience, the IMCs used in the Sandisk cards are most certainly better than IMCs used by other brands.

[kdsand]

Even if the camera doesn't specifically support UHS-I, it'll still make a difference. Here's a review for the SanDisk Extreme Pro 95MB/s SDXC 64GB card on B&H:

"My testing:
5GB Blackmagic file R/W test (limited by my Clevo laptop's card reader) 76MB/s read, 72MB/s write.

In my 60D:
Previous Sandisk card has 45MB/s read, 41MB/s write. This allowed a burst of 8x continuous shots @ 5.3 shots per second, then 1 shot per second thereafter capturing RAW+JPG each shot, ie 33MB per shot. (will also allow 50x shots continuous JPG only).

But, this new 90MB/s Write card has transformed my 18Mpix CANON 60D camera. Allows 8x RAW+JPG shot initial burst, then a just perceivable pause (eg 0.25sec), then another 6x RAW+JPG shot burst before slowing down. Effectively 14x RAW+JPG shot continuous bust now = 460MB captured to the camera's buffer just in 3.5 seconds ! This is a huge improvement. And the camera is ready for another shorter burst after another second pause. I had found the 8x shot burst limiting for kids sports.

18Mpix RAW only – now is 15x shot continuous burst (no pause) before slowing down.

VIDEO: The change here is the recovery time when banging of still shots during video. The cycle time is much shorter and little of the video is lost now (was typically 1sec of video lost – intrusive for sports).

From 8x shot burst (also CANON's specs) to 15x shot burst."

 I'm glad you broke it down 
 This seems to be what I'm getting also. It's nice to have something actually exceed specifications. Depending upon your budget these  are a very good investment when you can find them at a good price. I figure with another couple years everything's gonna need of these faster speeds and then slow cards will be sitting in the drawer.

 Regardless of whether you'd like or dislike sd cards these are fast enough, plentiful, dependable and tend to be less expensive.

 If indeed the hardware is not limiting the speed there could be a possible write speed increase with a firmware update.?.

 It just seems odd to limit the speed - the new rebels write faster. What about the times when all you have is a sd card 4 whatever reason? Yup at that point you are crippled.

Many devices actually have built in sd card readers like my laptop and my tablet. Not that an external card reader is that big but it is 1 more thing to drag along.
 

[feigenbaum]

From the manual:


I got this SD card
http://www.bhphotovideo.com/c/product/828326-REG/SanDisk_SDSDRX3_032G_A21_32GB_SDHC_Memory_Card.html
I wanted a 32GB, but didn't want to spend over 60$ Just seems wrong somehow spending that much on an SD card 

[briansquibb]

Why use SDHC cards when you can get supercharged CF cards?

[wamsankas]

Why use SDHC cards when you can get supercharged CF cards?

because they are super expensive compared to SD and gotta load up both slots with solid SPEED

[kidnaper]

SD cards for jpeg and video, CF for RAW.

[briansquibb]

Why use SDHC cards when you can get supercharged CF cards?

because they are super expensive compared to SD and gotta load up both slots with solid SPEED

Dont see why? the slower SDHC can can be used for video + jpeg and CF for RAW. Nobody is moaning from the 7D club - and their requirement is the same as the 5DIII

[wamsankas]

Why use SDHC cards when you can get supercharged CF cards?

because they are super expensive compared to SD and gotta load up both slots with solid SPEED

Dont see why? the slower SDHC can can be used for video + jpeg and CF for RAW. Nobody is moaning from the 7D club - and their requirement is the same as the 5DIII

right but 7D doesnt have the SD option. I would rather pay 70$ for a 16gb 95mbps SD card compared to a 120$ 16gb  90mbps CF card. that is if canon allowed for those 95mbps to be used

[briansquibb]

Why use SDHC cards when you can get supercharged CF cards?

because they are super expensive compared to SD and gotta load up both slots with solid SPEED

Dont see why? the slower SDHC can can be used for video + jpeg and CF for RAW. Nobody is moaning from the 7D club - and their requirement is the same as the 5DIII

right but 7D doesnt have the SD option. I would rather pay 70$ for a 16gb 95mbps SD card compared to a 120$ 16gb  90mbps CF card. that is if canon allowed for those 95mbps to be used

Quite simply 90mbps is overkill for a 5DIII. I am using a 30mpbs for my 5D4 and I get the expected number of images before buffer full. I haven't noticed an issue with buffer write delays.