The 16GB G-Monster 533X Plus is spec'd at read=90MB/sec and write=90MB/sec. The aData 32GB 533X is spec'd at read=80MB/sec and write=50MB/sec. I'll try and do the buffer clearing tests when I have a little time later. There were no measurements behind my comment of about the aData card writing at about half the speed of the G-Monster ... just watching the buffer write light after taking a shot.
Thank you paulfeng for the info. This confirms what I have heard from others that the 16gb Non Plus Gmonster cards are faster than the Sandisk 60mb/s cards. Being just a few bucks cheaper I think thats a great deal.
I have heard some bad stuff about the 32gb version of the non plus.. but that was only one case and it related to shooting video.
I would like to try the A-DATA Speedy CF 533X cards but I have heard too many complaints from Nikon users. Just a few complaints from sports shooters. I have only seen one benchmark and that was from a Nikon user and it performed like a 133x card. Obviously most cards will perform differently in different cameras. If they perform faster than a Sandisk Extreme III 30mb/s card then I'm sold, if not.. then I would be doing my customers a disservice by purchasing slow high capacity cards for sports events.
While I completely dig the mb/s benchmarks.. I think a simpler test is how quickly after you fill up the 7d frame buffer does the image preview come up. Further more how long does it take for the blinking light to stop.
To test this I simply used a stop watch. I hit "start" after the buffer had been filled up (give or take 1 or two extra shots after the initial burst). I ran the test 3 times and rounded to the nearest second just to be sure of my results.
Sandisk Extreme III 8gb 30mb/s
6 Seconds for image preview
16 Seconds total for buffer to completely empty
Sandisk Extreme III 4gb (Non 30mb/s edition)
12 Seconds for image preview
28 Seconds total for buffer to completely empty
Lexar Professional 4gb 133x (Write Acceleration)
14 Seconds for image preview
29 Seconds total for buffer to completely empty
The Sandisk Extreme III 8gb 30mb/s is pretty good but its definitely holding back my camera.
I'm getting read speeds of 59.4mbs on a Photofast 16GB 533x ( not the plus) and 27.6mbs on a Sandisk 16GB Extreme III (30mbs version) using a Sandisk 800 firewire card reader.
I did it..
I just bought 2 16gb G-Monster 533x cards.
I was going to go with the 32gb pro but I noticed that the 16gb non pro version was just hair slower in the benchmarks. This is still faster than the sandisk pro cards.
I would much rather have two cards than one.
Plenty of positive reviews... I only found two users out there that had problems and they where both related to the 32gb non pro card speed issues. Reliability is my only issue now. Since I have heard nothing from anyone out there.. its probably a good sign.
I dont see any reason why they wont work in the 40d.. but previous cameras tend to have maximum memory limitations. I imagine the 5d will be ok. Not sure about the 1d2 though.
Dave Jr wrote:
Anyone tested the aData speedy 533x 16GB?
I recently purchased an A-Data 533x 32GB CF card for use with my 7D. What I found is that the write speeds in camera are only about 150-200x. The write speeds using my Lexar Ultra card reader is about 200x with read speeds of about 266x. These speed measurements are just estimates based on real-world observation. I returned the first card I received and had it replaced just to be certain I didn't have a bad card. Although it would seem that the card's performance doesn't live up to it's claimed speed, I still think it's a bargain (@ $110) for the capacity. As far as the speeds, it's still plenty fast but no where near it's claimed speed. In all honesty, I really doubted it would come close to those speeds with such a huge price difference between the A-Data and the high speed Lexar & Sandisk cards. I e-mailed A-Data about the speed issue and they claim that the card is bench tested at the claimed speeds. I guess the problem is lab bench testing versus real-world device testing...it seems the cheap controllers in the A-Data cards just can't match their speeds outside the lab.
Its because they bench test it by connecting it to a computer. I'm sure it does perform at 533x just not in the camera. Too many variables, data transfer speed, CF ram latency, Camera CF port interface, amongst other things. Even the mighty new Lexar 600x doesn't perform at 600x on the 7d. It can do 52mb /s but it still cant do 90mb /s (600x)
False advertising? Not really. Misleading? Very much so. I bet the Lexar can do 600x with the right card reader. It may be a while before anyone makes a camera that can handle these extreme transfer speeds.
