PCI Express: x12 slots?

[Quartz]

Can a PCI Express slot be split into x12 and x4?

On most consumer motherboards there in one PCIe x16 slot which can be split into two x8 slots. That's not a lot of use these days. Allegedly the new GPUs will be bottlenecked by a PCIe v4 x8 slot, but not a x16 slot. NVME cards run off x4 slots. So is it possible to split x16 into x12 and x4?

 

[pandem0nium]

Basically, no. You could use the split x8 slot for 2 x nvme drives though with the right board and Add in card combination.

I do find it interesting though that on the Turing cards, there's a 10 gbps usb-C port you can run a drive off. Some bandwidth from the pcie slot must be being siphoned off to allow for that.

 

[ZXSpectrum]

Is it so you can run a 16x PCIe 4.0 and a 4x PCIe 4.0 NVME drive?

Which CPU is are you looking at?

 

[Quartz]

Is it so you can run a 16x PCIe 4.0 and a 4x PCIe 4.0 NVME drive?

This is entirely theoretical.