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?
We've previously tested the new Hybrid Mode in V-Ray RT 3.6, which combines CPUs and GPUs in order to speed up rendering, on Intel's Skylake X processors. This time around we are going to test on AMD's Threadripper 1950X, and use even more powerful GPUs than before. We also take a look at GeForce GTX 1080 Ti vs Titan Xp performance.
Benchmark results demonstrating that PCI-Express x8 vs x16 speeds don't impact GPU rendering performance.