Nothing fancy, just multiple copies of large files at the filesystem level, making sure that the cache wasn't giving false results. The transfer rates and the I

Nothing fancy, just multiple copies of large files at the filesystem level, making sure that the cache wasn't giving false results. The transfer rates and the I/O counters matched pretty well. This was on a vanilla Windows 10 workstation. We run a bunch of these things, and regularly bump up against the PCIe bus limits. There's something going on with your setup.