PCIEX16 to OCP+3*NVME

The motherboard needs to support splitting x4x4x4x4.
In order to be able to buy it for free, the baffle connection part and the M2 hard drive fixing part are 3D printed. If you make one individually, the cost will be lower, but it is not cost-effective in large quantities.
Pay attention to the tin finger bevel
test. OCP network card + 3 M2 fully plugged in functions are normal.
The two magnetic beads L1 and L3 select the fan supply voltage and cannot be soldered at the same time! !
The attachment only has a 3D file for fixing the hard drive. There is no baffle fixing part for the moment. M2 hard drive fixing studs can be directly used as M2 (thread outer diameter) studs. For light curing, you need to change the hole distance and then manually tap. For FDM, you can use embedded knurled nuts. Or just use a soldering iron to embed the studs in. The stud height needs to match the height of the M2 slot, which is about -1.2mm. For example, a 4.2mm height slot can be equipped with a 3mm height stud.