Benchmarking the Superior 256GB microSDXC Card
Crystal Disk Mark
The Silicon Power Superior microSDXC V30 UHS-I 128GB SD card managed a result of 94.78MB/s read speed, and 59.76MB/s write speeds on the SEQ1M Q8T1 test which simulates 8 sequential operations at once utilizing a single thread. This simulates moving large files such as photos or videos from the card to a PC, saving a burst of photos from your DSLR to the card or writing a continuous video file to the card. 94.78MB/S read speed is extremely close to the 100MB/s read speed advertised by Silicon Power, and is inline with what I expect from a Class 10 V30 UHS-1 microSDXC card.
The Superior microSDXC V30 UHS-I 128GB SD card did impress me with the random RND4k Q32T16 test scoring a 14.13MB/s read score and a 5.58MB/s write score. This test simulates 32 random operations at once across 16 threads, and indicates the performance during operations such as reading or writing to and from a database, as one might expect if using the SD card with a single-board-computer such as the Raspberry Pi.
Anvil Storage Utilities
I ran Anvil’s SSD Benchmark at 100%-Fill and much like the results in our previous review, the numbers were close but were a little slower than the Crystal Disk Mark scores. The Superior microSDXC V30 UHS-I 128GB SD card managed to score close to its 100MB/s advertised read speeds with Sequential 4MB file read operations averaged to 89.82MB/s, while sequential write operations averaged to 55.59MB/s.
ATTO Disk Benchmark
ATTO’s results were inline with both Crystal Disk Mark and Anvil, with ATTO and Anvil’s results being almost identical at 89.82MB/s read. The write results are still slightly off from the advertised speeds of 80MB/s scoring just 56.33MB/s, and while a 44MB/s discrepancy is a little unexpected, this card will have no problem performing in modern electronics.