How many GPU Ryzen can support..? for Octane Render

I want to use 1800x for my next Workstation build.
but my concern is regarding gpu support.
i cant see any boards with more than 2 PCI slots.
but 1800x has 24 lanes so it has to support more that 2 gpus.
I want more gpu for octane render.

Well you can put more than two GPUs in, and if you are just using it for render tasks it will be fine.
However even with 24 lanes it only really supports 2 gpus as 16 are dedicated PCIE for gpus and thing, 4 are M.2, and iirc 4 are the chipset.