PCI-E 4.0 NVME in PCI-E 3.0 performance | [H]ard|Forum
To test that PCIe gen 4.0 is actually enabled, MyDrivers used a PCIe gen 4.0 SSD on the M.2 slot that's directly wired to the SoC, on a TUF B450M Pro Gaming.
PCI Express
In this video we cover how to install, test and troubleshoot your PCIe Gen4 slot.
Kerfing Tool | eBay
The file Laser Cut Kerf Test Slot And Tab Clearance Test 3mm is .dxf file type, size is 481.26 KB. ... This clearance test was originally intended to be a kerf test for laser cutters and engravers.