Toshiba OCZ RD400 512GB NVMe SSD Review

Testing & Methodology

Hardware

• Gigabyte Z79X UD5H-BK
• Intel Core i7-4790K
• G.Skill Ares DDR3 1866MHz (2x4GB)
• OCZ Vertex4 256GB
• CoolerMaster Silent Pro Hybrid 850W
• NZXT Kraken X60
• Dimastech Easy V3

Software

• AIDA64 Storage Benchmark
• Anvil’s Storage Utilities
• AS SSD Benchmark
• ATTO Benchmark
• CrystalDiskMark
• IOMeter
• PCMark 8 Storage Benchmark
• Windows 10

In a bid to make our testing as thorough and as accurate as possible, we have devised a testing methodology to give us the maximum amount of data. Whilst this means that testing each drive will take considerably longer to test – nearly 36 hours – the picture that we are able to build upon the overall performance of each drive is far clearer and it provides a more accurate analysis at how a drive performs under different conditions.

There are many ways to test a storage drive and we have chosen to include close to every test possible. We will start with a normal benchmark analysis of the formatted drive with various fillage scenarios. Depending on how a drive is built, it might perform differently depending on how much data it already is storing. To test this, the drive will be tested empty as well as with 25%, 50%, and 75% space usage. For these tests, we will be using Anvil’s Storage Utilities, AS SSD Benchmark, ATTO Benchmark, and CrystalDiskMark. Besides these synthetic fill tests, the drive will also be tested with PCMark 8’s storage benchmark in order to get real-world performance results.

Following the fillage tests, the partition will be removed and we test the drive’s raw performance. These tests will determine the hardware’s capabilities while removing any interference from the set file system. AIDA64’s storage benchmark, IOmeter, and HD Tach are all great tools for this and they help us paint an even clearer picture of the drive.

Durability is also a factor when it comes to NAND-based drives as the chips only can be rewritten so many times before they’ll stop working properly. Modern SSDs come with wear-level algorithms to increase the lifetime and reduce this factor as much as possible. We also take this into consideration in our reviews, but real-world conditions would take years to complete. Luckily Anvil’s Storage Utilities comes with an endurance test to simulate this. It is considerably faster, but it is still a process that can take up to three days where we’ll write up to 15 TB data to the drive in the form of thousands and thousands of small files in various sizes and compressibility.

Following the conditioning process, all of the previous benchmarks will be run again in the same scenarios and order. This will give us a great view on how a drive will perform after 3 years of usage and that is a very relevant factor.

Modern operating systems all take care of the TRIM command in the background and it isn’t something normal users need to worry about. However, For these reviews, I will add a waiting period between each benchmark to make sure that the TRIM command has been fully executed and finished. We want a clear picture of the drives performance with minimal interference from the operating system.

On each page that follows with the benchmark results, I have inserted the screenshots from the benchmark results, created a drive analysis chart for fill-level as well as a drive comparison chart for each software used, where possible.