pcie x1 2.0 enough for Vray Gpu?

[joey145]

I already have 2 gpus on my x16 slots. I have one more x1 pcie 2.0 slot left. I can buy one of those riser adapters that Bitcoin miners use. Will x1 pcie 2.0 (~500 MB/s) be bottlenecking a GTX 1070Ti?

Following this logic... Can a bitcoin mining rig work as a Vray render node?

[a7az0th]

It should work at the cost of slightly increased startup time, as it would take slightly longer to load the scene on the GPU. After that, V-Ray does not use the PCI but much, so it shouldn't really matter.
Bear in mind that this is valid for the current state of V-Ray GPU
We're currently developing out-of-core, which would allow rendering of huge scenes by allowing V-Ray to offload resources it doesn't currently need our of the VRAM and onto the system RAM
This functionality however is very PCI intensive and you would need all the PCI speed you need to get it working fast.