Can someone clarify PCIe terminology of the B450 TOMAHAWK

Can someone clarify PCIe terminology of the B450 TOMAHAWK msi b450 tomahawk max m 2 slot 2 x SATA 6Gbs ports · 1 x slot msi slot MSI - B450 TOMAHAWK MAX USB-C Gen2 AMD Motherboard ; Slot Number Of Memory Slots 4 ; Memory Maximum Memory Supported 64 gigabytes Memory Slot

msi slot Storage, AMD? CPU 2 x SATA 6Gbs ports1 1 x slot 1 Supports PCIe x4 (1st, 2nd and 3rd Gen AMD Ryzen? Ryzen? with Radeon? Vega Graphics and 2nd

msi b450 tomahawk max m2 slot SATA5 and SATA6 ports will be unavailable when installing a device in slot RAID, AMD B450 Supports RAID 0, RAID1 and RAID 10 for SATA Specification: · PCI, - 1 x PCIe x16 slot -1st, 2nd and 3rd Gen AMD Ryzen processors support x16 speed