hardware - What's the bandwidth and form factor for PCIe x1 x4 x8 and x16? - Server Fault
GLOTRENDS M.2 PCIe NVMe 4.0/3.0 Adapter with 0.12 Inch Thick M.2 Heatsink for M.2 PCIe SSD (NVMe and AHCI), PCI-E GEN4 Full Speed, Desktop PC Installation (PA09-HS) - Newegg.com
Don't want to buy an over-spec'd NVMe; what's the max speed for an PCIe 2.0 x4 M.2 slot? : r/buildapc
Solidigm SSDPFKNU010TZX1 P41 Plus 1TB M.2 2280 PCIe GEN 4 NVMe 4.0 x4 Internal Solid State Drive, Speed up to 4100MB/s - PlatinumMicro.com