The initial test file written by Diskspd contains completely unique data.Unfortunately diskspd itself is not a good tool for testing storage that supports de-duplication - see my separate post on Diskspd for the full details, but in short : DiskspdĪccording to their website, CrystalDiskMark is basically just a front-end to Microsoft Diskspd. Ranking of the fastest SSDs overall (incl.CrystalDiskMark is the type of tool I wouldn't even normally look at due to it's focus market, but one of our SE's asked about it last week, so.ĬrystalDiskMark is a tool you would normally see used on standalone hard disks/SSD, in particular on consumer focused websites like Toms Hardware - not on enterprise All-Flash Arrays.Either of these SSDs is a good choice for a high-end gaming PC build in 2023 or as a storage add-on for the PS5. However, it is not necessarily faster by amounts that are noticeable in the real world. On average, Samsung’s 990 PRO is faster than the Western Digital WD Black SN850X. In the simple read-speed test, the difference between these flagship drives is negligible. You should opt for the versions with a heat spreader to fully comply with Sony’s recommendation. PlayStation 5 Read Speed TestĪlthough non-compliant drives like the SN770 will also work with the PS5, the Samsung 990 PRO or WD Black SN850X are better suited as storage expansions SSDs for the PlayStation 5 console. The Samsung 990 PRO comes out ahead of the WD Black SN850X by 15% as measured in average bandwidth. UL’s 3DMark Storage Benchmark combines a range of gaming workloads – not just loading times, but also copying and recording games. As long as DirectStorage is not involved, even an SSD in an M.2 enclosure can rival high-end internal SSDs in this benchmark (and likely more than a few actual games). There is an insignificant difference of some milliseconds between the two SSDs. The same thing applies to the standalone Final Fantasy Shadowbringer benchmark, where loading times for five different game levels are combined into a total. The App Start-up times (cold start) from the corresponding test in PCMark 10 show that the Samsung SSD is slightly ahead on average, but is not necessarily faster than the SN850X in all situations. Again, the Samsung 990 PRO is about 20% faster than the WD Black SN850X. Latency is another important metric that will be highly relevant to actual performance in various workloads. Here, the Samsung 990 PRO holds a clear lead over its rival by 23,5% (read) and 28% (write). Random performance at minimum queue depths is often a better indicator of overall performance in many real-world scenarios. The Samsung 990 is marginally ahead of the WD Black SN850X by about 3% in sequential reads/writes. In the CrystalDiskMark benchmark, the numbers are typically more in line with the specification tables. CrystalDiskMark Sequential & Random Performance The Samsung drive is slightly ahead in the sequential write area, whereas the SN850X is in the lead in terms of read speeds. Both the SN850X and 990 PRO are very fast in this particular benchmark. AS SSD Sequential PerformanceĪS SSD uses incompressible data and the sequential performance results are typically far below what you see in the spec sheets. The 2TB and 4TB WD drives nevertheless come with identical specs, so this shouldn’t noticeably affect the results. ![]() Note that we are comparing the 2TB Samsung 990 PRO with the 4TB WD Black SN850X. Here’s how the two SSDs differ in our own data. Of course, specification tables cannot be directly translated into real-world performance. Samsung uses its in-house controller and NAND Flash memory chips, and the same goes for WD, which uses a controller/NAND combi from its subsidiary SanDisk. Even if the WD Black SN850X is substantially faster than many competitors, it lags behind the Samsung flagship in all performance metrics.īoth SSDs use an onboard DDR4 buffer and offer identical warranty and endurance terms. When simply comparing the specifications and nothing else, it certainly looks like the Samsung 990 PRO is a clear winner. Last update on / Affiliate links / Images from Amazon Product Advertising API
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