
I installed my 1TB NVMe drive. (ADATA - XPG - GAMMIX Gaming S11 Pro at 3500/3000MB). In this case, it worked fine for a month at around 800 megabytes per second, but now it's not going over 40 megabytes per second. Tried to reformat the drive, no change. I put the drive in the second m.2 slot on the motherboard and it works fine there, so it must be like that. I've tried several high speed cables and my laptop and 2 desktops have USB 3.1 Gen 2 ports.

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