The Crucial P5 Plus and the WD Black SN850 and SN850X are also rated at 600TBW and 1,200TBW for 1TB and 2TB respectively. The 990 Pro's durability ratings (expressed in terms of lifetime write capacity in total terabytes written or TBW) equal those of several other PCIe 4.0 speedsters, including its predecessor. (Unfamiliar with M.2 and PCIe jargon? Check out our guide to SSD terminology.) The new silicon, the company claims, improves power efficiency by up to 50% compared to the 980 Pro. It combines Samsung MLC 3-bit V-NAND flash memory with a homegrown controller that Samsung says is the first on a consumer SSD to employ 8-nanometer architecture. The 990 Pro is manufactured on an M.2 Type-2280 (80mm long) "gumstick" printed circuit board and uses the NVMe protocol over the PCIe 4.0 bus. It doesn't quite match its predecessor's rating because other recent internal SSDs outpaced it in our gaming benchmarks, but its overall capability makes this Samsung a versatile drive well-suited for creative tasks. This power-efficient drive gets high marks for raw speed, everyday application performance, a strong software suite, and hardware-based encryption. The Samsung SSD 990 Pro (starts at $169.99 $289.99 for 2TB as tested), the company's flagship PCI Express 4.0 internal solid-state drive, has a hard act to follow-we gave the SSD 980 Pro 4.5 stars and an Editors' Choice award-but for the most part makes a great product even better. Best Hosted Endpoint Protection and Security Software.
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