How to make NVMe SSD run at PCIe x4??

So I believe most of us here are familiar with the concept of a PCI-E 16x slot being capable of providing up to 75w of power through the

PCIe x8 slot can handle almost exactly what a PCIe x16 slot can currently handle Another helpful aspect of PCIe

4x4 super slot Marvell 88SE9215 PCIE to SATA Card PCI-E Adapter PCI Express to Expansion Card 4Port SATA III 6G for SSD HDD IPFS Mining · TISHRIC PCIE SATA 4X 1X

4x4 mega slot 13, Intel X299, 8 x DDR4 DDR4 4200+, 4 x PCIe x16 1 x , AMD 3-Way CrossFireX NVIDIA 3-Way SLI, na, CH HD , GLAN + Wi-Fi, 0,