Version and / or Patch Used: 3.0 Technical Preview
Developer Homepage: http://crystalmark.info
Product Homepage: http://crystalmark.info/software/CrystalDiskMark/index-e.html
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.
When you test SSDs for a living, you find little benchmarks inside of benchmarks, targets to look for that help determine performance across the broad range of applications. We've only had three consumer SSDs hit 40MB/s in CDM's 4K read. The Samsung 840 Pro in 128GB and 256GB capacity size and the Chris Ramseyer Signature Edition 128GB SSD. The SanDisk Extreme II in all capacity sizes gets very close to 40MB/s in this test, knocking on the door of 39MB/s in all capacity sizes.
Further down the chart you'll find the original Extreme SSD from SanDisk. In the 480GB capacity size the 4K performance is much lower than the Extreme II. The architecture on the original lacks a DRAM cache for buffing page table data. When you start mapping 512GB of information, the DRAM buffer comes in handy.