Question Slow NVME speed

Jun 5, 2019
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I have a NVME Samsung 970 with heatsink connected to motherboard directly through M.2. It's not the boot disk.

When i turn on the PC, if i test with crystaldiskmark i get slow speed read/write results:



However, if i reboot the PC and i execute the test again, i get correct results:




If I turn off the PC again and turn it on, or if it goes into a state of suspension, in both cases, i get again slow results.

I have looked in the bios and I have not seen anything that could cause this behavior. The motherboard is a Gigabyte Z390 UD and is updated to the latest firmware. The problem occurs with both heatsink and non-heatsink, so it's not a matter of NVME temperatures.

Thanks!
 

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