I believe Delkin Devices is a brand that I found while doing a search for microSD card brands. If I remember correctly, I came across a survey where someone was asking what the most reliable microSD card was, and they had this listed as an option.
These cards bear the U3 and V30 marks — and performance measurements were good enough — across all three samples — to qualify for these marks. Interestingly, sequential read scores were pretty well below average, while all other performance scores were pretty well above average. Also interestingly, these cards share the same manufacturer ID, OEM ID, product name, and product revision with the PNY Premier-X 128GB — and while sequential write, random read, and random write speeds were similar, the PNY Premier-X did far better in sequential read speeds.
All three samples are currently going through endurance testing:
- Sample #1 has survived 6,370 read/write cycles so far and has not yet experienced any errors.
- Sample #2 has survived 4,032 read/write cycles so far and has not yet experienced any errors.
- Sample #3 has survived 4,023 read/write cycles so far and has not yet experienced any errors.
June 11, 2025