W10/W11 slow on iMac i9-9900K

Discussion in 'Windows Virtual Machine' started by BenjaminF6, Dec 31, 2021.

  1. BenjaminF6

    BenjaminF6 Bit poster

    Windows 10 on an iMac i9-9900K with 32GB RAM is behaving slow, especially when clicking on URL links - it can take up to a minute that the VM is responding to the click. It used to work normally in the beginning.
    What I tried so far: upgrade to macOS Big Sur, upgrade to macOS Monterey, upgrade to Parallels Desktop 16, upgrade to Parallels Desktop 17, upgrade to Windows 11 - no change; changed vCPU from default (4 vCPU) to 8 vCPU - nochange, changed from default (4 vCPU) to 2 vCPU. A little bit better, but still not acceptable.
    After starting the VM, the first 10 minutes or so, the performance is ok. After that you cannot really work with it anymore. Within macOS everything behaves normal. Any ideas what could cause the issue?

    iMac 27" 2019 with i9-9900K, 32GB RAM, 1TB SSD; VM has 4 vCPU's, 8GB RAM, 200GB (only VM running)

    thanks, Benjamin

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