13-05-2021

Rampage V Extreme M 2 Slot

Hello everyone! First of all, congratulations for the Great forum! Here is my preliminary notes: My motherboard is Asus Rampage II Extreme (stock 2101 bios) and has three PCIe 2.0 x16 slots, which can be configured to work as x16 x8 x8. Recently I bought a Samsung 950 Pro, 256 GB and a PCIe 3.0 x4 adapter for M.2 NGFF PCIe SSD.

Slot

Rampage V Extreme M.2 Nvme

Rampage V Extreme M 2 Slot

Rampage V Extreme M.2 Slot

Rampage v extreme m.2 slot
Can someone give me a definitive answer as to how each of the 3 M.2 slots are wired on the RVIE? As in exactly which are CPU and PCH? It looks like the DIMM.2 has one each CPU and PCH but what about the 3rd slot down at the bottom? Is that CPU or PCH?
My goal is to use 2x M.2's (1xCPU for boot drive and 1xPCH for optane accelerator) while keeping PCIe x8_4 at full x8 bandwidth.
Can I use one of the DIMM.2 slots and M.2 socket 3 for this purpose and still have x8 on PCIe x8_4?
EDIT: I forgot to mention I will be using a 44 lane CPU and will also be using SLI @ x16 and x16