The WD Black also excelled in PCMark 10's trace tests, which are some of the individual component scores that are aggregated to comprise the Overall score. Crystal DiskMark's sequential speed tests provide a traditional measure of drive throughput, simulating best-case, straight-line transfers of large files. We put the SN850X through our usual suite of solid-state drive benchmarks, comprising Crystal DiskMark 6.0, PCMark 10 Storage, and 3DMark Storage. We test PCI Express 4.0 internal SSDs using a desktop testbed with an MSI X570 motherboard and AMD Ryzen CPU, 16GB of Corsair Dominator DDR4 memory clocked to 3,600MHz, and a discrete GeForce graphics card. Testing the WD Black SN850X: Superb Overall Storage and Gaming Results
DISKMARK X PLUS
You'll find it in some high-performance PCIe 4.0 drives including the Crucial P5 Plus and the ADATA XPG Gammix S70 Blade. One thing the WD Black SN850X lacks is hardware-based AES 256-bit full-disk encryption, widely regarded as the gold standard for consumer SSDs. We ran our performance tests on the SN850X with this mode enabled. The utility also lets you activate Gaming Mode 2.0, which includes features such as predictive loading and caching of game elements, improved thermal management, and control of background functions.
DISKMARK X SOFTWARE
The abovementioned WD Dashboard utility is a free download that lets Western Digital SSD owners check drive status, perform software and firmware upgrades, run diagnostics, and erase the drive, as well as customize the RGB lighting behavior of drives that come with the illuminated heatsink. WD warranties the SN850X for five years or until you hit the rated TBW figure in data writes, whichever comes first. The terabytes written/TBW spec is a manufacturer's estimate of how much data can be written to a drive before some cells begin to fail and get taken out of service. At the other extreme, the budget-minded Mushkin Delta-which uses less write-durable QLC memory-is rated at just 200TBW for 1TB, 400TBW for 2TB, and 800TBW for 4TB. They're the same as several other TLC-based speedsters-both the Crucial P5 Plus and the Samsung SSD 980 Pro are rated at 600TBW and 1,200TBW for 1TB and 2TB respectively. A few PCIe 4.0 drives offer substantially higher durability ratings the MSI Spatium M470, for instance, is rated at 1,600TBW for 1TB and 3,300TBW for 2TB. Once completed, you are given the results including total disk time, average MB/s, last run and the minimum/maximum MB/s compiled for the whole test process.ĭiskMark is quite simple to configure but provides a good deal of information about your hard drive(s) performance, and since it is so simple and lightweight, it will be a viable option even for novice users wishing to see what their hard or removable drives can handle.The SN850X's durability ratings (expressed in terms of lifetime write capacity in total terabytes written, or TBW) match the SN850's for the two capacities they have in common.
While DiskMark is running through the process, you are provided with a color-coded performance graph highlighting any fluctuations as well as the values for average, last, minimum and maximum reads and writes. You can configure the test parameters by choosing which disk you wish to target, buffer size, and the number of times the file size is written on the disk. It includes a few options that will allow you to accurately determine what the performance level of your hard drive is by learning the reading and writing speeds. DiskMark enables benchmark testing of your disk and hard drive performance.
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