Blender - CPU or GPU - which to invest in?

General Forums Blender and CG Discussions
41

some GPU references

First is PCIE 1.0 vs 2.0 vs 3.0 on same motherboard. all 16x setups.

you can consider PCIe 2.0 16x = PCIe 3.0 8x when talking about bandwidth

42

Here is something more recent

GTX 1080 PCIe express scaling tests