Chuxia 32GB

This is a brand that I found while browsing through microSD cards on AliExpress. The original card art design caught my attention. What can I say? (Squirrel!)

Performance test results between the three samples were wildly inconsistent:

• Sequential read speeds ranged from 30MB/sec to 80MB/sec across the three samples.
• Sequential write speeds were a little more consistent, ranging from 18MB/sec to 24MB/sec across the three samples.
• Random read speeds ranged from 444 IOPS/sec to a whopping 4,430 IOPS/sec — the single largest random read speed I’ve gotten from any card.
• Random write speeds ranged from 575 IOPS/sec to 1,000 IOPS/sec.

The disparity in the results is a little worrisome, and I honestly have no explanation for it — but let’s move on.

Most performance measurements fell below average — only random write speeds were consistently above average. These cards carry the Class 10, U1, V10, and A1 markings; performance was good enough for the Class 10, U1, and V10 markings, but only sample #2 performed well enough to qualify for the A1 marking. However, I’ll give my standard disclaimer here: my performance testing methods do not align with those prescribed by the SD specifications; it’s possible that these cards would have done better had they been tested under proper conditions.

On the endurance testing front:

• Sample #1’s first error was four-sector wide corrupted data error during round 1,384. It has survived 18,758 read/write cycles in total so far.
• Sample #2 is the only one of the three that made it past the 2,000 read/write cycle mark without errors. It had its first error — which was a series discontiguous corrupted data errors — during round 4,339. It has survived 17,109 read/write cycles in total so far.

• Sample #3’s first error was a six-sector wide address decoding error during round 114. It was doing quite well until round 4,437, when it decided to return repeating sequences of  00 00 06 00 in every sector. (Funnily enough, this pattern repeated throughout each sector, except for the last 16 bytes of each sector — which were all 00‘s). Here’s the graph of this card’s progression, boring as it is:

My conclusion: meh. These cards aren’t the greatest performers. They’re not the worst performers by far — but there are better options out there for the money.

June 11, 2025 (current number of read/write cycles is updated automatically every hour)