That's definitely something that should be taken into account, especially on newer "consumer" CPUs which may actually not even have enough lanes for a GPU and N

That's definitely something that should be taken into account, especially on newer "consumer" CPUs which may actually not even have enough lanes for a GPU and NVMe drive [0]. In my case, the CPU has 40 PCIe lanes, and all PCIe 16x slots on the motherboard are electrically 16x. --- [0] For example, the i5-8500 only has 16 lanes total: https://ark.intel.com/content/www/fr/fr/ark/products/129939/intel-core-i5-8500-processor-9m-cache-up-to-4-10-ghz.html https://ark.intel.com/content/www/fr/fr/ark/products/129939/...