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Western Digital Launches the WD Black SN770 DRAM-less NVMe SSD

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Yeah, I agree that number does look a tad high, but Micron says more than 10K P/E cycles and that data is a few years old as well. The 20K figure seems to be related to some "industrial" 3D TLC NAND flash and might not translate directly to SSDs.

I believe it matters little what the actual numbers represent. What we were trying to establish is durability of 3D TLC vs planar MLC. Whatever the testing conditions were, I believe we have been shown how these compare with each other under similar circumstances.
 
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