ricardo00
Well-known member
There is also the possibility that the Delkin Power cards run at a higher temperature than the Delkin Black cards? And this could be more of a problem with the Z8.
Delkin Power vs Delkin Black Cards?
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John Navitsky
Well-known member
they do. and different ones (sizes, generations) run at different temps. note there are two power entries here for different sized cards: https://www.thessdreview.com/our-re...ld-2tb-cfexpress-type-b-memory-card-review/3/
Delkin recently announced a major update to the Delkin Power cards. They refer to them as Delkin Power G4. Their launch announcement had a very brief promo in conjunction with B&H only. The full production and distribution of the cards is in process and should be shipped shortly. I have an order for a 1TB G4 card placed through Hunt's Photo. MSRP on the cards is $349 for the 1TB card. The 650 GB card is priced at $269. The slower 512 GB card is priced at $179. All these prices and more for other sizes are posted at B&H.
The card speed of the G4 cards has two stages - a slower speed and low price for 512GB and lower, and a high speed card that almost matches the current Delkin Black starting at 650GB and higher. The price of all these cards is much lower than historical pricing - probably because the cost of memory has dropped significantly and the technology is maturing.
There is a new version of the Delkin Black on the horizon, but it has not been announced or produced yet. It will re-establish the higher performance of the Delkin Black cards over the Delkin Power. Meanwhile you'll probably see some promotions and sales on the older Delkin Power and Delkin Black cards to blow out inventory in advance of the new cards. The Delkin Black cards are more robust with a tougher physical case and upgraded components - just understand they are about to be upgraded.
My strategy on cards is to make sure I have a fast card - so I'm using the 1TB Delkin Power G4. It's a good price per GB and supports Rre-release Capture, Auto Capture, and video. The write speed in the camera was already good and it did not overheat. With the faster card, I have that benefit as well as great pricing.
Keep in mind that with downloads, you need not only a good card reader but also a fast transfer cable. Any bottleneck is prone to overheating.
Here is a link to the Delkin G4 cards:
www.delkindevices.com
The card speed of the G4 cards has two stages - a slower speed and low price for 512GB and lower, and a high speed card that almost matches the current Delkin Black starting at 650GB and higher. The price of all these cards is much lower than historical pricing - probably because the cost of memory has dropped significantly and the technology is maturing.
There is a new version of the Delkin Black on the horizon, but it has not been announced or produced yet. It will re-establish the higher performance of the Delkin Black cards over the Delkin Power. Meanwhile you'll probably see some promotions and sales on the older Delkin Power and Delkin Black cards to blow out inventory in advance of the new cards. The Delkin Black cards are more robust with a tougher physical case and upgraded components - just understand they are about to be upgraded.
My strategy on cards is to make sure I have a fast card - so I'm using the 1TB Delkin Power G4. It's a good price per GB and supports Rre-release Capture, Auto Capture, and video. The write speed in the camera was already good and it did not overheat. With the faster card, I have that benefit as well as great pricing.
Keep in mind that with downloads, you need not only a good card reader but also a fast transfer cable. Any bottleneck is prone to overheating.
Here is a link to the Delkin G4 cards:
Delkin POWER CFexpress™ Type B G4 Memory Cards - Delkin Devices
PCIe 3.0 Interface Records 8K, 6K & 4K Video at HighFrame Rates & Bitrates Max Transfer Speed: Up to 1780 MB/sMax Write Speed: Up to 1700 MB/s Sustained Write Speeds128GB – 512GB: 805 MB/s650GB – 2TB: 1490 MB/s Fully Compatible in All Modes ofAll Current CFexpress™ Type B Hosts Overview: POWER...
www.delkindevices.com
Pxlwz
Member
I believe, the first generation Delkin Black cards were not quite as fast as advertised. The current crop (like your 150GB) has higher sustained write speads. My 256Gb Black cards were around 40 shots to buffer at 20fps lossless compressed, the newer 325GB are closer to 80 shots to buffer lossless compressed and I did not hit the buffer yet wit HE*.
John Navitsky
Well-known member
@EricBowles it's good to hear there is a new Black on the horizon. i've told myself that i should not buy any more of the current "fast" cards until the next gen comes
John Navitsky
Well-known member
i've heard that as well, but at least with my gen1 512GB card and gen2 640GB card, performance did benchmark to be about on par:
note this is in a pci to nvme cfe adapter, not in-camera, so in-camera may still have had issues (i will note that my prograde cobalt is less consistent once it hits the buffer even though it's similar speed. i think this is because the cards have different random access speeds, and my guess is the camera has to do a combination of operations, like updating the file catalog so raw write speed doesn't always translate directly to better in-camera performance). also note SSD review benchmarked this same card slower, so it's possible my 512GB card was a different version than theirs
ricardo00
Well-known member
Yes I have seen that chart but never knew how to interpret it (and didn't have that much faith in it?). How come there are no error bars? Did they only check one card of each kind? One time? And there seems to be large differences between different size cards. Does one really believe there is a difference between a score of "39" (the Delkin Black 512 card) and "45" (the Delkin Power 128 GB card)? To me, that is the same. And then the 256 GB Delkin Power card jumps to "56"?
John Navitsky
Well-known member
SSD Review is pretty much the only source i trust to have done the tests carefully enough for them to be meaningful. I did a bunch of testing and it took me quite a while to figure out how to get good tests (and i'm a computer systems guy) including buying a pile of card readers until i realized that NONE were going to work and buying a special pci to nvme cfe adapter (and if you read their their site, you'll see they use a similar device, but theirs was custom built). Once I got my tests dialed in, they line up pretty well with the ones done by SSD Review.
Note that's not a "score", it's temperature in centigrade .
And I do believe the different sized cards will perform differently. They will have different chip configurations based on size. This is why almost all the smaller cards are slower than the bigger cards of the same "model". It stands to reason that heat performance will be impacted as well.
However, as you note, I do think they are just a snapshot in time; one specific card of one specific size of whatever model generation was coming off the line at the time. I do wish they'd test each size, multiple samples, each generation and more cards, but obviously that's a whole big and expensive proposition.
I do appreciate that Delkin is adding the "G4" to their new version of the Power. I don't think it's super cool for these manufacturers to have different revisions of the card under the same model name.
BigIUFan
New member
Could you please confirm that you are talking about the latest version, G4, of the Delkin Power CF cards?
Thanks.
No, I am referring to the previous version Delkin Power cards.....mine is NOT a G4 card. (I don't believe the G4 card in 512GB is even available yet, but I could be wrong)
ricardo00
Well-known member
Some G4 cards (the 2TB and 325GB) appear to be in stock at BH (though not the 512GB).
agrumpyoldsod
Well-known member
I have both a stack of Delkin Black Cards including the NEW 650GB card AND also NOW the Delkin Power G4 card also 650GB
The packaging indicates:
650 GB Delkin Black - sustained write speed 1530 MBps
650 GB Delkin Power G4 - sustained write speed 1490 MBps
TheSSDReview folk's testing indicates slightly slower speeds - 1430 -vs- 1320 -- but these are for the OLDER versions of the cards. G4 is NEW and so are the slightly larger 650GB -vs- 512GB DB cards.
So far the Delkin Power G4 seems fine but I have not stress tested it with crazy video codex and data rates. NOR do I intend to
The packaging indicates:
650 GB Delkin Black - sustained write speed 1530 MBps
650 GB Delkin Power G4 - sustained write speed 1490 MBps
TheSSDReview folk's testing indicates slightly slower speeds - 1430 -vs- 1320 -- but these are for the OLDER versions of the cards. G4 is NEW and so are the slightly larger 650GB -vs- 512GB DB cards.
So far the Delkin Power G4 seems fine but I have not stress tested it with crazy video codex and data rates. NOR do I intend to
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BigIUFan
New member
I think the sustained write speed increases between the 512GB (805 MB/s) and the 650GB (1490 MB/s) cards. However, they do specify that the 512GB cards are capable of 8K recording. Of course there are different "flavors" of 8K as well.
The 512GB cards were in stock at B&H as I had added them to my cart. They have since gone into backorder status.
The 512GB cards were in stock at B&H as I had added them to my cart. They have since gone into backorder status.
BigIUFan
New member
Yes, and the 128GB and 1.3TB as well. I don't pretend to understand the hit or miss aspect of that.
Calson
Well-known member
The Delkin Power cards have increased in price by more than 40% over the past two months so no longer a great deal. I found them adequate for 20 fps stills and for 4K60p video with the Z9 camera. A card only has to be fast enough in real world use and test measurements are often not reliable. I found this with my D500 and the early batches of XQD cards that would have timing issues and result in the camera locking up completely. I needed to remove the card to be able to boot the camera. Both the Sandisk and Lexar XQD cards were replaced by their manufacturer and fortunately I had the problem while shooting near my home.
There are minimum throughput and data timing and buffering requirements for longer bursts at 20 fps than for shooting video which in turn depends on the shooting rates and resolution. One can pay a lot more for higher speed cards that provide capabilities most users will never need to utilize.
There are minimum throughput and data timing and buffering requirements for longer bursts at 20 fps than for shooting video which in turn depends on the shooting rates and resolution. One can pay a lot more for higher speed cards that provide capabilities most users will never need to utilize.
DJinVT
New member
This is REALLY helpful info @Wade Abadie. Thank you for taking the time to circle back.
I have two 512GB Power cards that I am really happy with for now... but—if I'm on Safari in Africa, I'm investing in some Blacks ;-) //dj
I heard that the minimum retailer order from Delkin was 1000 CFExpress cards. With that order was a B&H only promotion on the 1TB cards that included an email program. I don't know what kind of flexibility they had on card sizes, but I'm sure they did not order all sizes given all the choices.
With the Delkin Power G4, the 512GB cards and smaller have a slower minimum sustained write speed - 805 MB/s. The 650 GB and larger cards had a minimum sustained write speed of 1490 MB/s.
The actual speed in the camera will be something slower as you have not only the write speed, but the image processing and a check function to make sure images are correctly written. The speeds will vary by camera. The same card in a Z9 may be slightly slower in a Z8, and significantly slower in a Z7ii. There are a lot of components involved as well as software in the card and the camera, and the slowest component can throttle speeds - especially with bursts at high frame rates or for 8k video or high frame rate video. If you have a bottleneck, the camera and card are more likely to operate at higher temperatures or overheat.
If you plan to use Pre-Release Capture, Auto Capture, or similar features that generate a lot of data, the larger cards and fast speeds are going to be important.
At this time I have no need at all for a 1TB card, and was initially going to get a 650 GB card which is the smallest with the higher speeds. But the cost per GB continues to drop as card size gets larger, so the incremental cost is relatively low.
With the Delkin Power G4, the 512GB cards and smaller have a slower minimum sustained write speed - 805 MB/s. The 650 GB and larger cards had a minimum sustained write speed of 1490 MB/s.
The actual speed in the camera will be something slower as you have not only the write speed, but the image processing and a check function to make sure images are correctly written. The speeds will vary by camera. The same card in a Z9 may be slightly slower in a Z8, and significantly slower in a Z7ii. There are a lot of components involved as well as software in the card and the camera, and the slowest component can throttle speeds - especially with bursts at high frame rates or for 8k video or high frame rate video. If you have a bottleneck, the camera and card are more likely to operate at higher temperatures or overheat.
If you plan to use Pre-Release Capture, Auto Capture, or similar features that generate a lot of data, the larger cards and fast speeds are going to be important.
At this time I have no need at all for a 1TB card, and was initially going to get a 650 GB card which is the smallest with the higher speeds. But the cost per GB continues to drop as card size gets larger, so the incremental cost is relatively low.
agrumpyoldsod
Well-known member
This performance is for the OLD/original Delkin Power card.
What is important for those wanting performance is to buy the NEW G4 version of the power card not the older version.
As noted above -- the packaging for the G4 Power 650 states sustained write speed 1,490 MBps
The 650GB, 325GB, 150GB are all either the NEW Delkin BLACK cards OR the NEW Delkin G4 Power cards
The packaging for the NEW Delkin Black 650GB states 1530 MBps
BigIUFan
New member
The 512GB G4 cards at B&H again show that they are "In Stock".
ricardo00
Well-known member
Crazy only $175 for a faster card! Wish I hadn't bought the Delkin Black cards for $500.
BigIUFan
New member
Keep in mind that the sustained write speed for the 512GB Power G4 is still quite a bit lower than than the Delkin Black cards. The Power G4 is rated for 805 MB/s. The Black can sustain from 1240 - 1530 MB/s depending on the capacity of the card.
However, the 512GB Power G4 @ $175 will work just fine for me.
ricardo00
Well-known member
And wonder if the Delkin black operates at a lower temperature?
Yes - you can make the call on whether you want the faster card which is 650GB and up, or the lower priced card which is slower - and that's 512 GB and smaller.
The Delkin Black is a lot faster than the slower cards. So there is a difference.
Probably so - if you have sustained video or sustained bursts my guess is the slower card speed will result in a warm card.
Douglas L
Member
Hi folks, newbie here. I am getting a Nikon Z9 so I need two Type B cards. I am looking at 325 GB Delkin Black cards for continuous burst shoots, video is not my thing. On B&H website I saw two different Black cards for very different price:
1. $424.99, MFR #DCFXBBLK325,
2. $279.99, MFR #DCFXBB325,
I chatted with B&H this morning and was told the more expensive card is "faster and can withstand temperature extremes". I don't even see the more expensive one (MFR #DCFXBBLK325) on Delkin's website anymore.
I emailed Delkin to ask but no response yet. Can anyone clarify?
Thanks.
1. $424.99, MFR #DCFXBBLK325,
2. $279.99, MFR #DCFXBB325,
I chatted with B&H this morning and was told the more expensive card is "faster and can withstand temperature extremes". I don't even see the more expensive one (MFR #DCFXBBLK325) on Delkin's website anymore.
I emailed Delkin to ask but no response yet. Can anyone clarify?
Thanks.
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