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How would I notice this on a Linux machine? I have a pair of 980 pro 1 TB in a software raid 0 and a pair of 2 TB in a software raid 0. I've disabled the cache on all 4 of them in order to minimize corruption in case of an unclean shutdown and iirc they run at about 500 MB/s, which is way below the 7000 MB/s they're supposed to run at. I bought them in December 2021 from Amazon, where Amazon was the seller.

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Whats the point of getting a 980 pro if you're going to disable the cache? Don't disable cache, prevent unclean shutdowns

Have you tried to measure their performance as specified, rather than deliberately crippled? It doesn't sound like you have any reason to suspect you have counterfeit drives when you already have a simpler explanation.

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