This package NVMDowngrade_Package_Silicom_167 is for PE425G4i81L-XR-NU to downgrade firmware to ver.3.20.
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Operating System Support
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E810_NVMDowngradePackage_v3_20_EFI.tar.gz	- for EFI x64
E810_NVMDowngradePackage_v3_20_ESX.tar.gz	- for ESX x64
E810_NVMDowngradePackage_v3_20_FreeBSD.tar.gz	- for FreeBSD x64
E810_NVMDowngradePackage_v3_20_Linux.tar.gz	- for Linux x64
E810_NVMDowngradePackage_v3_20_Windows.zip	- for Windows x64
