The WD Black SN770 1 TB is a powerful, value-focused Gen4 NVMe SSD that delivers impressive sequential and random performance, solid endurance, and energy efficiency—all wrapped in a minimalist, DRAM-less package. It’s an excellent choice for gamers and performance enthusiasts looking to upgrade without breaking the bank.
WD Black SN770 NVMe 1TB, Upto 5150MB/s, 5Y Warranty
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Form Factor & Interface
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M.2 2280 (80×22×2.38 mm), single-sided, ultra-thin design
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PCIe Gen4 ×4, NVMe protocol Dong Knows TechStorageReview.com
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Sequential Performance
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Read: Up to 5,150 MB/s
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Write: Up to 4,900 MB/s StorageReview.comTom's HardwareHotHardware
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Random IOPS (4K)
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Read: Up to 740,000 IOPS
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Write: Up to 800,000 IOPS StorageReview.comTom's HardwareHotHardware
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Endurance & Reliability
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Terabytes Written (TBW): 600 TBW for 1 TB model StorageReview.comDong Knows Tech
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Mean Time to Failure (MTTF): 1.75 million hours StorageReview.com
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Warranty: 5-year limited StorageReview.comdocuments.westerndigital.com
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Controller & NAND
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Utilizes WD’s in-house 4-channel controller
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DRAM-less design (relies on Host Memory Buffer, HMB)
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Paired with TLC-based BiCS5 NAND RedditClub386
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Power Efficiency & Thermal Handling
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Up to 20% more power efficiency compared to SN750 SE (1 TB model) documents.westerndigital.comNewegg.com
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Optimized PCB layout to separate controller and NAND for improved heat dissipation; supports a “Game Mode” to enhance thermal performance documents.westerndigital.com
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Additional Features
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Compatible with Microsoft’s DirectStorage technology
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Supports tuning and monitoring via WD Black Dashboard (Windows only)
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Attribute Specification Interface PCIe Gen4 x4 (NVMe) Read Speed Up to 5,150 MB/s Write Speed Up to 4,900 MB/s Random Read IOPS Up to 740,000 Random Write IOPS Up to 800,000 Endurance (TBW) 600 TBW Warranty 5-year limited MTTF 1.75 million hours Controller In-house, DRAM-less (HMB) NAND BiCS5 TLC Power Efficiency ~20% improvement vs. SN750 SE Thermals Game Mode + PCB layout Extras DirectStorage support, Dashboard integration

