To try out the ADATA XPG 64GB SDXC UHS-I Speed Class 3 memory card we will us using the SuperSpeed USB 3.0 interface on the ASUS Z97-A motherboard with the system running Windows 8.1 w/ Update 1 and all the latest drivers.
To get the best performance possible we used the SanDisk Extreme Pro UHS-II SD USB 3.0 card reader/writer that is sold under part number SDDR-329-A46 for $44.95. This is a UHS-II card reader and is the fastest that we have in our arsenal and shouldn’t bottleneck the performance of this UHS-I U3 SDXC card.
CrystalDiskMark is a small benchmark utility for drives and enables rapid measurement of sequential and random read/write speeds. Note that CDM only supports Native Command Queuing (NCQ) with a queue depth of 32 (as noted) for the last listed benchmark score.
Benchmark Results: CrystalDiskMark showed that we were able to hit 96.1MB/s read and 88.7MB/s write on the sequential test! The ADATA 64GB SDXC Ultimate card is speed rated at 95MB/s read and 85MB/s write, so we are able to confirm those speed ratings with this benchmark.
ATTO is one of the oldest drive benchmarks still being used today and is still very relevant.. ATTO measures transfers across a specific volume length. It measures raw transfer rates for both reads and writes and places the data into graphs that can be very easily interpreted. The test was run with the default runs of 0.5kb through 8192kb transfer sizes with the total length being 256mb.
Benchmark Results: The ADATA XPG 64GB SDXC UHS-I U3 card was able to again reach 96MB/s read and 87MB/ write speeds in ATTO with the default benchmark settings. This is the fastest SD card that we have ever tested!