What is the difference between PCIe Gen 3 and PCIe Gen 4?

website m 2 4 0 in 3 0 slot Hi, I installed a samsung 980PRO ssd on my X570 GAMING PLUS motherboard in the slot, nothing both in bios and windows does not detect the m2 sata slot is a slot that can interface with SATA , PCI Express

m 2 4 0 in 3 0 slot As with previous generations, the standard simply doubles the speed that the PCIe slot runs at It now provides about 2GBs per lane  PCIe PCIe x 16 Slots 7 · 6 · 5 · 4 · 3 · 2 · 1 SSD Slots 5 x Ultra-Fast Storage：4*PCIe x4 slots; Efficient Overall Thermal：VRM Thermal  You're referring to NVME based M2 SSDs, correct? But yes if the SSD is PCIE spec then of course the speed will be less when used on PCIE

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