Version and / or Patch Used: 3.0 Technical Preview
Developer Homepage: http://crystalmark.info
Product Homepage: http://crystalmark.info/software/CrystalDiskMark/index-e.html
Download here: http://crystaldew.info/category/software/crystaldiskmark
CrystalDiskMark is a disk benchmark software that allows us to benchmark 4K and 4K queue depths with accuracy.
* Sequential reads/writes
* Random 4KB/512KB reads/writes
* Text copy
* Change dialog design
* internationalization (i18n)
Note: Crystal Disk Mark 3.0 Technical Preview was used for these tests since it offers the ability to measure native command queuing at 4 and 32.
Here we see those 4K read IOPS put to the test and a measurement displayed at throughput. 840 Pro 250GB writes 4K data at 40MB/s and Vector 256GB does it at 31MB/s. Both drives scale well through the queue depth tests, but Samsung has a lead.
Here we also get our first look at sequential reads at higher than QD1. Again, Samsung has a lead here, not by much, but a lead nevertheless. The difference is Vector limits a single request to just 350MB/s so you have a reserve for multitasking. When we first tested Vertex 4 the QD1 read limit was just 200MB/s, an imposed limit that hampered file transfers especially large sequential transfer like movies. The limit was increased with later firmware. Let's discuss this late in the review when we talk about real-world file transfers.
As we discussed on the previous page, Vector has a little extra umph when writing 4K data. The Samsung 840 Pro's 4K write performance isn't anything to overlook though since 135MB/s is still higher than most of the products on our chart.