Can someone confirm if I have understood the PCI lane allocation correctly for this scenario?
I have the X570 Ultra, with a 3090 in the main PCIe16 slot. I have NVMe SSDs in M2 slots A and B. I have 2 SATA ports in use (not sockets 5 or 6)
I'm wanting to add an additional NVMe to the system, given the Black Friday prices, the WD SN850X is an option - this could go into the M2 C slot, however would run at x2 rather than the normal X4 speeds. As this is a Gen4 socket, does this mean that speeds would be limited to around 5000MB/s? Or less?
Is another option to use the 3rd PCIex16 slot (which runs at x4) with an NVMe adapter to fit the SSD and allow it to run at it's max speed?
Edit: Just to update, ended up going for the 3rd NVMe slot, the 805x caps at 3300MB/s for reads and writes. Might try getting a PCIe adapter at a later point, but for now this will be fast enough for me anyway