As warned earlier, PCIe Gen5 NVMe SSDs, although really fast, are suffering from massive thermal control issues. New Gen5 drives from Corsair, Crucial, are thermal throttling, and even shutting down.
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The adoption of PCIe 5.0 SSDs could finally take off with the launch of upcoming Ryzen 7000 and Intel 13th Gen processors. However, not all PCIe Gen5 SSDs are made equal as some models are slower.