Silicon Power Superior 128GB V30 SDXC Memory Card

Performance:

The test system used in this review is equipped with an Intel Core i7-6700K CPU, GIGABYTE GA-Z170X-UD3 motherboard, 32GB (16GB x 2) of Crucial Ballistix Sport LT DDR4 memory, Samsung 960 PRO 512GB SSD, GIGABYTE GeForce GTX 1060 WINDFORCE OC 6G graphics card and a Transcend TS-RDF5K USB 3.0 card reader. For the operating system, I installed a fresh copy of Windows 10 Enterprise.

To test the performance of Silicon Power's 128GB Superior SDXC card, I ran a series of benchmarks using CrystalDiskMark and ATTO Disk Benchmark. To get a feel for the "real world" performance, I also copied and pasted 1GB of random files and directories as well as a single 4GB ISO file in Windows Explorer.

CrystalDiskMark 5.1.2:

First, I ran a few quick tests using CrystalDiskMark. This benchmark tool measures the performance of a storage device by testing its sequential read and write speeds as well as its random read and write speeds using blocks 512K and 4K in size.

Silicon Power Superior 128GB SDXC

Samsung EVO Plus 128GB microSDXC

According to Silicon Power, the Superior SDXC card is capable of reading at 100 MB/s and writing at 80 MB/s. While the card had no problems reaching its rated write speed, it came up short in CrystalDiskMark's sequential read speed test.

ATTO Disk Benchmark 2.46:

I also used ATTO Disk Benchmark to test the Superior SDXC card's sequential read and write speeds. The test was run using blocks ranging in size from 0.5KB to 8192KB and the total length set to 256MB.

Silicon Power Superior 128GB SDXC

Samsung EVO Plus 128GB microSDXC

When tested with ATTO, the Superior SDXC card's read speeds topped out at about 92 MB/s and its write speeds at 81 MB/s.

"Real World" Benchmark:

To test the "real world" performance of Silicon Power's Superior SDXC memory card, I copied and pasted 1GB worth of randomly generated files and directories. All of the files are between 1KB and 95MB in size and no more than five directories deep. To see how well the card handled large files, I also copied and pasted a 4GB ISO file.

Silicon Power's new card performed very well here, taking 27 seconds to write 1GB worth of test data and 15 seconds to read it back.

Final Thoughts:

Silicon Power's Superior SDXC card is a great choice for the consumer looking for fast, yet affordable, storage for their DSLR cameras and HD camcorders. The card is waterproof, dustproof, temperature-proof and X-ray-proof and, with capacity options ranging from 64GB to 512GB, you can store up to 150,300 photos or 24 hours of 4K Ultra HD video. The Superior SDXC card is also UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) rated and is capable of delivering some impressive performance numbers. In our tests, the 128GB version of the card was able to read at speeds as high as 92 MB/s and write at more than 80 MB/s.

Silicon Power's Superior SDXC card is available now in 64GB, 128GB and 256GB capacities. Prices on Amazon.com currently range from $10 up to $35, with the 128GB version reviewed here retailing for about $18. There is no word yet on when the 512GB card will be available or how much it will be.

Highs:

• Available in 64GB, 128GB, 256GB and 512GB capacities
• Meets UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) standards
• Excellent read and write speeds
• Waterproof, dustproof, temperature-proof and X-ray-proof
• Reasonably priced
• 5 year warranty

Lows:

• Nothing