Its 4K read and write scores effectively tied the best scores of our comparison drives.(Manufacturer, Model, Series, Codename), Connect search words with and or .Īnnounced at least months ago (>0) Show only items with known benchmark results Still available (not archived) Show benchmark bars Show single scores on hover Show Percent Perf. The SN770 slightly exceeded both its 5,150MBps read and 4,900MBps write ratings in Crystal DiskMark testing. 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 WD Black SN770 through our internal solid-state drive benchmarks including PCMark 10 Storage and Crystal DiskMark 6.0. 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 graphics card. Testing the WD SN770: Great at Workaday Tasks One feature the drive does not offer is 256-bit AES hardware-based encryption, which we've seen on comparable drives including the XPG Atom 50.
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diagnostics, enable Gaming Mode-which disables power saving-and update the firmware. The Dashboard lets you check the drive status (space allocated, volumes, and temperature), run S.M.A.R.T. Drives with comparable rated speeds include the ADATA XPG Atom 50 (5,000MBps read / 4,500MBps write), the Corsair MP600 (4,950MBps read / 4,250MBps write), and the MSI Spatium M470 (5,000MBps read / 4,400MBps write).įor software, the company provides the WD Black Dashboard, with which we're familiar from other products in the lineup such as the WD Black SN850. The SN770's sequential speed ratings of 5,150MBps read and 4,900MBps write put it in the midrange of PCI Express 4.0 internal SSDs.
(TBW tends to scale 1:1 with capacity, as with the drives cited here.) WD's warranty covers the SN770 for five years or until you hit the rated TBW figure in data writes, whichever comes first. The "terabytes written" 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. Conversely, QLC-based drives like the Mushkin Delta and the Sabrent Rocket Q4 are less durable, rated at just 200TBW for 1TB, 400TBW for 2TB, and 800TBW for 4TB.
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The XPG Atom 50 is rated at 650TBW for 1TB.Ī few PCIe 4.0 drives offer much higher durability ratings-the Corsair Force Series MP600 and the Silicon Power US70 are rated at 1,800TBW for 1TB and 3,600TBW for 2TB. The WD Black SN850, the Crucial P5 Plus, and the Samsung SSD 980 Pro match its rated 600TBW for the 1TB model and 1,200TBW for 2TB, while the Kingston KC3000 has slightly higher ratings of 800TBW for 1TB and 1,600TBW for 2TB. The durability ratings for the WD Black SN770, as measured in terabytes written (TBW), are typical for a TLC-based drive. Although dropping DRAM helps reduce a drive's cost, it can potentially hurt performance, but there was scant evidence of that when we benchmarked the SN770 using our testbed system. This makes the SN770 the latest of several recent M.2 drives to employ DRAM-less architecture others include the XPG Atom 50 and the WD Blue SN570. The controller eschews the DRAM cache used by some pricier drives, instead enlisting your PC's main memory as a host memory buffer (HMB). (Check out our glossary of SSD terms if some of this jargon is new to you.) The drive combines 112-layer TLC NAND flash with a homegrown WD controller. It employs the NVMe 1.4 protocol over the PCIe 4.0 bus. The SN770 is a PCIe 4x4 drive manufactured on an M.2 Type-2280 (80mm long) "gumstick" printed circuit board. Although it falls just short of unseating our budget internal SSD champ, the ADATA XPG Atom 50, the WD Black SN770 is well worth consideration by cash-strapped gamers. This DRAM-less M.2 SSD set a new high mark in our PCMark 10 Overall Storage benchmark and did well in tasks such as program loading and file copying. The WD Black SN770 NVMe SSD, Western Digital's latest PCI Express 4.0 internal solid-state drive, offers strong performance at a modest price ($129.99 for the 1TB drive we tested, with models starting at $59.99 for 256GB).
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