Application:
I used the card for video recording. If the card is too slow or interrupt the write speed for a short time a strong, there is stuttering and problems in the video itself.
1. Delivery:
Writing with 8, then after a few seconds only with 5-6 Mbyte / s.
(Format NTFS + FAT tested)
After several attempts, the card was not recognized and returned.
2. Delivery:
Writing with 7-8, after a few seconds with only about 5 8 Mbyte / s.
(Format NTFS + FAT tested)
Tested both cards in the same drive with the same data.
Now the amazing thing:
have been exactly the same card for about 9 months in operation.
Write here: at least 15 MB / s, constant! In the same equipment and with the same test data.
Conclusion:
Apparently large differences between batches.