PCI-Express has been the standard for connecting video cards and other expansion devices inside of computers for many years now, and several generations of the technology have now passed. With each of those generations, the amount of data that can be transferred over the PCIe connection has increased. How much impact does that have on modern video cards? Is there any benefit to running a PCIe 3.0 card in a 4.0 slot, or loss if using a 4.0 card in a 3.0 slot?
Core i7 7820X vs Core i9 7900X: Do PCI-E Lanes Matter For GPU Rendering?
Benchmark results demonstrating that PCI-Express x8 vs x16 speeds don’t impact GPU rendering performance.
V-Ray GPU Rendering Platform Comparison: Skylake X, Xeon W, and Threadripper
This article looks at several motherboard chipsets, including X299 and X399, comparing how well they handle performance scaling across multiple GPUs in V-Ray 3.57.01.