- Obtained from: Amazon
- Advertised capacity: 32GB
- Logical capacity: 31,096,569,856 bytes
- Physical capacity: 31,096,569,856 bytes
- Fake/skimpy flash: Skimpy (2.82% skimp)
- Protected area: 83,886,080 bytes
- Adjusted skimp: 2.56%
- Speed class markings: Class 10, U1
- CID data:
- Manufacturer ID:
0x9f - OEM ID:
0x5449(ASCII:TI) - Product name:
0x5350434320(ASCII:SPCC) - Product revision:
0x12
- Manufacturer ID:
| Sample # | 1 | 2 | 3 | Average |
|---|---|---|---|---|
| Price paid | $9.99 | $6.50 | $6.49 | $7.66 |
| Serial number | 0x088601bc | 0x668603ca | 0x668603cc | N/A |
| Manufacture date | Nov 2023 | Jan 2009 | Jan 2009 | N/A |
| Sequential read speed (MB/sec) | 92.28 | 92.29 | 89.22 | 91.26 |
| Sequential write speed (MB/sec) | 23.46 | 23.39 | 17.53 | 21.46 |
| Random read speed (IOPS/sec) | 1,210.29 | 1,267.93 | 1,270.31 | 1,249.51 |
| Random write speed (IOPS/sec) | 256.14 | 250.12 | 260.65 | 255.64 |
| Read/write cycles to first error | Not yet determined | Not yet determined | 920 | 920 |
| Read/write cycles to complete failure | Not yet determined | Not yet determined | 921 | 921 |
| Total days to complete failure | Not yet determined | Not yet determined | 42 | 42 |
| Card reader used | JJS CR-UTC4AC | JJS CR-UTC4AC | JJS CR-UTC4AC | N/A |
| Package front |  |  |  | N/A |
| Package back |  |  |  | N/A |
| Card front |  |  |  | N/A |
| Card back |  |  |  | N/A |
Discussion
3D NAND is a newer flash memory technology where transistors are built up in layers, allowing for greater memory density. In fact, Branch Education did an excellent video on SSDs where they went into how 3D NAND technology works and how it’s produced. Since it’s a newer technology, I wanted to see how it compares to traditional (2D) NAND. This was the first one I found that advertised itself as 3D NAND and was within my budget. Admittedly I’m not very familiar with Silicon Power, but they’re a member of the SD Card Association, so I’ll lump these cards in with the “Name Brand” category.
You might notice the difference in price, as well as the fact that two of them have CID data indicating that they were manufactured in 2009. What I purchased was a single card and a two-pack, as the two-pack was only a few dollars more than the single card. Of course, what Amazon sent me was just two single cards (each in its own packaging) together in an envelope. I believe the two that have their manufacture date set to 2009 were from this pack, but I didn’t keep track of which ones came from the two-pack, so I can’t be 100% sure. Why do they have their manufacture date set to 2009? No clue. But I’m pretty sure the chances that they were actually manufactured in 2009 are next to nil.
Performance on these cards was a little disappointing. Sequential read speeds were above average, but all other metrics were below average. All measurements came in within one standard deviation of average. Is this a factor of the fact that this is a 3D NAND card? No clue — I might have to test some of SP’s other (2D NAND) models to figure that out.
All three samples are currently undergoing endurance testing:
- Samples #1 and #2 have not yet made it to the 2,000 read/write cycle mark. They are currently expected to get there sometime in August 2024.
- Sample #3’s first error was a series of write failures and address decoding errors affecting 65,536 sectors during round 921. It survived until the end of the round, but then stopped responding to commands partway through round 922.
July 10, 2024