We have the chance to run some benchmarks with Kingston’s SDCA10 Class 10 UHS-I (Ultra High-Speed Bus, Speed Class 1)
microSDHC/SDXC card, which promises to deliver 90MB/s read and 45MB/s write speeds, meaning it reads
up to 9x faster and writes up to 4.5x faster than standard Class 10 microSDHC/
UHS-I U1 technology lets users shoot full HD video, 3D video and
real-time broadcasts without interruption and capture images continuously on
their phones. It can be used with the included SD card adapter, so you can also capture and access data on the card with any device that has an SD card slot. You'll be able to use your memory card with SD enabled cameras, camcorders, tablets, and laptops.
The SDCA10 Class 10 UHS-I is available in 16GB, 32GB and 64GB capacities.
Smartphone, tablet and small-format camera users will benefit from the
transfer speeds offered by the SDCA10 Class
10 UHS-I card, which is compatible with microSDHC/SDXC host devices and not
compatible with standard microSD-enabled devices and readers.
- UHS-I speeds - 90MB/s read and 45MB/s write
- Class 10 performance when used in a non-UHS-I
- When combined with the SD adaptor, can be used as
a full-size SDHC/SDXC card
- Compatible with microSDHC and microSDXC host devices;
not compatible with standard microSD-enabled devices/readers;
microSDXC cards are not compatible with microSDHC-enabled
- File format - FAT32 (microSDHC 16GB-32GB),
exFAT (microSDXC 64GB)
- Lifetime warranty
- Capacities: 16GB, 32GB, 64GB
- Performance: 90MB/s read and 45MB/s write, UHS-I Speed
Class 1 (U1) microSDHC/SDXC
- Card Dimensions: 11mm x 15mm x 1mm
- SD Adaptor Dimensions: 24mm x 32mm x 2.1mm
- Operating Temperature: -25°C to 85°C
- Storage Temperature: -40°C to 85°C
- Voltage: 3.3V
The Kingston 32GB MicroSDHC U1 can be found in stores in the package you see below. Both the nicroSDHC card and its adaptor are included in the package:
With the provided host adapter, the microSDHC card can be used like a SDHC card.
The benchmarks below were conducted with the microSDHC/adapter connected to a PC via a card reader, also provided by Kingston (Kingston reader USB 3.0). The sequential read and write speeds we got matched the card's specs quoted by Kingston, at 89 MB/s and 44.3 MB/s for read and write, respectively. However, reducing the block size for the random read test to 4 KB significantly impacts performance, which tops out at a mere 5.32 MB/s.
Randomly writing 512 KB or 4K blocks is not a strong suit for the microSDHC card, as the throughput dropping to zero-point-zero-something MB/s.
ATTO Disc Benchmark also gave a pretty stable 85.5 MB/s and 41.3 MB/s performance for write/read, but with files larger than 32MB:
Kingston's 32GB MicroSDHC U1 card is fast, at least in the sequential transfer tests. Achieving the maximum throughput from requires the use of a
UHS-I-enabled device or, better still, a USB 3.0-connected reader. So you can expect to transfer the entire capacity of the card to a PC in around 8-9 minutes when allied to a decent USB 3.0 card reader.
The provided adapter allows you to read the microSDHC card in a SDHC card reader.
The card retails online at Amazon .com for $23.