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NVMe disk in PCIe - big write/read different

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Hi guys,

today I finally got my PCIe x4 NVMe card for genuine Apple NVMe 12+16pin ( currently I have only 128GB). So I installed macOS Monterey 12.6.4 with OCLP. Everything is OK but the write/read speed look really odd to me. It's possible that the different is so big ?

Write 619.0 MB/s

Read 1435.3 MB/s

Thank you very much for any ideas/advice.

[image|2911243]

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Mac Pro 2009-2012

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open