Am loving macphun too and with every new update theres new toys,I do hope a catalog system is in the works so I can ditch Adobe all together,

Hi,

during my last birds in flight shooting, the buffer of the GH5 ran full very fast and the emptying of the buffer, the storing on the SD card, took long in my eyes.

I use the UHS-I 128 GB Transcend (R95, W60), and the Sandisc Extreme 90 MB/s, also UHSI, cards.

For the 150 Mbit/s for 4K video of the GH5 these cards are by far fast enough
But while taking picturs, the writing of the full buffer on the card seems to be a bottleneck.

Thats why I did a few tests:
Frame size: 3:2 L mode, serial mode H, JPEG and RAW on. Elecronic shutter and after each test, I formated the cards again.
What I did not expect was, that in my tests the ISO had an influence in the speed how fast the buffer was filled. Auto ISO was about 25-30% slower than a fixed ISO value.
Those setting of course had no influence on how fast the cards rote the data from the buffer


I wanted to see how long it takes until the buffer is full and how long it takes to write it on the card.
I am aware, that filling up the buffer has nothing to do with the SD cars used.

All results giving aer tendencies. There might be a few pictures more or less when you test or a second difference. But the overall resulty are clear.

Both cards had pretty much the same speed.
Using AFS and MF, the buffer of the GH5 filled with 70 images in about 6 seconds, the writing on the card took 50 seconds, no matter if Jpeg and RAW was saved on the same card or on 2 different cards.
AFC: 8 - 10 seconds to fill the buffer. Writing on card: 50 Sekunden.


I felt this is too long.

Then I have bought the UHS-II 64 GB Transcend card with R285 and W180 MB/s, which is about as fast a s a V30 card. Costs around 100 € at the moment.

Of course, the times the buffer filled up were the same. But writing the biffer on the card took only 27 seconds, compared to 50 seconds on the UHSI cards.

Better already.

Then I had a look at the UHSII Sandisk Extreme Pro, which, according to the sandisk website has these read/Write speeds:
Read Speed: up to 300 MB/s*
Write Speed: up to 260 MB/s*

Also about V30.

I bought the 64 GB version for about 130 €.

The tests showed, that the Tanscend and Sandisk UHSII cards have exactly the same speeds to write the buffer on the card. The Sandisk had no advantage, even though on the paper the Transcend was with 180 MB/s, compared to the 280 MB/s of the Sandisk, 100 MB/s slower.
That had no effect in my tests.

AFS + MF: 5-6 seconds to fill the buffer. Writing on card: 27 seconds.
AFC: 8-10 seconds to fill the buffer. Writing on card: 27 Sekunden.

As written above, I thought the Sandisc would be faster than the Transcend, but it is not.

So, if you expect a write advandage of the Sandisk, you can save the 30 € and buy the Transcend.
Same speeds.

A difference from the UHS-I cards to the UHS-II cards is, that during the process of writing the buffer on the cards, with the UHS-I card you can continue to take about 1 picture every 2 seconds, while with the UHS-II cards you can make 1 picture per second.
So about twice as fast which is the same speed advantage as 50 to 27 when writing the buffer on the cards.


Then I did further tests, taking only RAW or only JPEG pictures, always MF and fixed ISO

UHS-I cards

Sandisk:
only RAW:
Buffer full after 9 seconds with 76 images, emptying the buffer: 39 seconds
only JPEG:
Buffer full after 22 seconds with 191 images, emptying the buffer: 18 seconds


Transcend:
only RAW:
Buffer full after 7 seconds with 66 images, emptying the buffer: 37 seconds
only JPEG:
Buffer full after 20 seconds with 191 images, emptying the buffer: 18 seconds

So again roughly the same speeds.


The UHS-II cards:

Sandisc:
only RAW:
Buffer full after 10 seconds with 80 images, emptying the buffer: 16 seconds
only JPEG:
The buffer did not fill up. After 30 seconds there were 260 images on the card and when I stopped, the buffer was empty.


Transcend
only JPEG:
Buffer full after 10 seconds with 80 images, emptying the buffer: 14 seconds
only JPEG:
Same as Sandisk: The buffer did not fill up. After 30 seconds there were 260 images on the card and when I stopped, the buffer was empty.


I hope this information is of use for some of you.

Dieter

Hi Joseph, Hi Kevin. Sorry I missed this live :( Darn work responsibilities. Got Luminar Neptune for my daughter as a birthday present this past weekend! Neptune and macphun rocks!!!

Stumptown coffee downtown....the best cappuccino I ever had.