- Obtained from: AliExpress
- Price paid: $4.79*
- Advertised capacity: 64GB
- Logical capacity: 61,891,149,824 bytes
- Physical capacity: 61,891,149,824 bytes
- Fake/skimpy flash: Skimpy (3.30% skimp)
- Protected area: 134,217,728 bytes (inaccessible)
- Speed class markings: Class 10, U30, V30, A1
- CID data:
- Manufacturer ID:
0x02** - OEM ID:
0x544d(ASCII:TM)** - Product name:
0x5345303634(ASCII:SE064) - Product revision:
0x89
- Manufacturer ID:
* The price shown is for the 32GB version. See the discussion for more information.
** This manufacturer ID/OEM ID is well known to be associated with Toshiba/Kioxia.
| Sample # | 1 | 2 | 3 | Average |
|---|---|---|---|---|
| Serial number | 0xf4847fb3 | 0xf484c2b3 | 0xf484c1b3 | N/A |
| Manufacture date | Oct 2022 | Oct 2022 | Oct 2022 | N/A |
| Sequential read speed (MB/sec) | 87.79 | 91.11 | 94.05 | 90.98 |
| Sequential write speed (MB/sec) | 50.93 | 50.03 | 62.06 | 54.34 |
| Random read speed (IOPS/sec) | 3416.56 | 2294.91 | 2367.29 | 2692.92 |
| Random write speed (IOPS/sec) | 826.33 | 610.67 | 683.05 | 706.68 |
| Read/write cycles to first error | 5,109 | 895 | Not yet determined | 3,002 |
| Read/write cycles to complete failure | Not yet determined | Not yet determined | Not yet determined | Not yet determined |
| Total days to complete failure | Not yet determined | Not yet determined | Not yet determined | Not yet determined |
| Card reader used | SmartQ Single | JJS CR-UTC4AC | JJS CR-UTC4AC | N/A |
| Package front |  |  |  | N/A |
| Package back | Not available |  |  | N/A |
| Card front |  |  |  | N/A |
| Card back | Not available |  |  | N/A |
Discussion
First things first — I actually ordered the 32GB version; the seller sent me the 64GB version. I don’t know if the seller simply made a mistake or if they were out of the 32GB version and sent me the 64GB as a replacement — but whatever. Free upgrade!
Performance-wise, these cards actually did rather well. All three cards had sequential write speeds that were more than one standard deviation above average, with the lowest measurement putting it in the 84th percentile. Sample #1 had a random read speed that was more than two standard deviations above average, and a random write speed that was more than one standard deviation above average. The lowest of the random read speeds put it in the 75th percentile, while the lowest of the random write speeds put it in the 81st percentile.
As of this writing, all three cards are still undergoing endurance testing:
- Sample #1 has experienced errors, but it made it well past the 2,000 read/write cycle mark before doing so — its first error was during round 5,110, and it has survived 7,136 read/write cycles overall so far.
- Sample #2 survived 895 read/write cycles before it experienced a data mismatch error; however, the error only affected 8 sectors and has not recurred since. It has survived 4,629 read/write cycles so far.
- Sample #3 has survived 3,823 read/write cycles so far and has not yet experienced any errors.
June 15, 2024 (current number of read/write cycles is updated automatically every hour)