What happens if you use a PCIe 4.0 NVMe SSD in a PCIe 3.0 M.2 motherboard slot? - Quora
Amazon.com: GLOTRENDS M.2 PCIe X1 Adapter with M.2 Screw for M.2 PCIe 4.0/3.0 SSD (NVMe/AHCI Key M), PCIe X1/X4/X8/X16 Lane Installation, but Only PCIe X1 Bandwidth (PA09-X1) : Electronics
NVMe PCIe 4.0 vs NVMe PCIe 3.0 vs SATA3 SSD vs SATA3 HDD in 2021 - YouTube
Storage Game Loading Test: PCIe 4.0 SSD vs. PCIe 3.0 vs. SATA vs. HDD | TechSpot
AMPCOM M.2 NVME SSD to PCIE Adapter Card, 40Gbps SSD PCI X4 3.0 Adapter for Desktop PC, PCI-E GEN3 Full Speed : Amazon.co.uk: Everything Else
SSD NVMe PCIe 4.0 vs SSD NVMe PCIe 3.0 vs SSD SATA III Loading Windows and Games - YouTube
What is the difference between PCIe Gen 3 and PCIe Gen 4? - Kingston Technology