Can I put a 16x graphics card in a 4x slot and it still work?

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4 Design Ready for PCI Express 1*PCIe x4 & 2* PCIe Unlock the latch of the PCIe slot easily when remove the graphics card in the PCIe slot

4 4 slot 4-slot mainframe holds up to 600 W of total power and up to 4 modules More than 30 DC power modules to choose from ; Voltmeter

4040 t slot aluminium extrusion , Clear anodised, 8mm slot width, One slot per side, Total 4 slots, Weightmeter Precise Custom cutting of all lengths ordered can be done on request