Performance
Performance has been tested on an Intel Haswell-E platform based on 5820K processor and ASUS Rampage V Extreme motherboard. All tests were performed on Intel USB controller which is providing the best results. However USB controller performance may vary and in most cases it’s the reason of lower than expected USB device performance.
Let’s begin our tests. First is ATTO Disk Benchmark so one of the most popular storage benchmarks.
Results are a bit lower than expected. Maximum read is close to 140MB/s while maximum write is near 60MB/s. Both are great results for SD card but could be better. Hard to say if it’s motherboard fault or something else. We’ve seen lower performance on some setups in the past but usually Lexar products are showing higher performance than declared rather than lower.
For tests has been used USB 3.0 card reader which can also cause lower performance.
In CrystalDiskMark we can see similar situation so results close to 140MB/s read and 60MB/s write. What is worth to mention is that random read bandwidth is great considering it’s “only” SD card. 12-13MB/s for this type of storage is really good result.
Last benchmark is Anvil’s Storage Utilities which is showing over 93MB/s write. This is much more than we could expect. Usually this benchmark is showing the lowest bandwidth.
Test results are different depends on used benchmark and test files so it’s hard to say if lower results in some benchmarks are caused by hardware or maybe just that test environment isn’t perfect for Lexar Professional 1000x card.
Lexar Professional 1000x 128GB card performs good and even though some results are lower than expected I can’t complain. The same situation happened with couple of other USB storage products which on different motherboard were performing much better. I will test some more in next weeks and if I see bigger differences then I will update results in this review.
