Thanks to Slavic its solved.
Samsung does supply a Windows 8 compatible NVMe driver. However, it's not a windows 8 driver, but a windows 7 driver.
The "64bit Samsung_NVMe_driver_v18.104.22.1682 WHQL for Win7 x64" works for Windows 8 Pro (my PC) and Windows 8 Enterprise (fresh install on my PC)...
Thanks for the answer, but I don't understand it.
Windows 8 has kernel 6.2 and Windows 8.1 has kernel 6.3.
Windows 8 has no Microsoft NVMe driver. Windows 8.1 has a standard Microsoft NVMe driver. Anyway, Intel and Samsung add their proprietary NVMe drivers to Windows.
And it's interesting that...
I would like to use an NVMe SSD with an Asrock Z77 motherboard using PCIe 4x. Intel and Samsung supply SSDs which are compatible with this mobo.
Intel has driver downloads (Download Datacenter NVMe* Microsoft Windows* Drivers for Intel® SSDs) for
Windows 10, Windows 8.1, Windows 8 and Windows 7...