No such tool exists because it doesn’t support that functionality.
No such tool exists because it doesn’t support that functionality.
I looked for similar information but didn't find a match. Generally, direct CPU PCI lanes offer better performance than those routed through the chipset. With your setup—5900X, RTX 4090, NVMe drives, large HDD, and multiple USB devices—it's possible you're close to exceeding available lanes.
The terminology is incorrect. You're exceeding the PCIe lanes—typically you have 20-24 lanes, with 16 for the GPU and 4 for the chipset that handles USB, SATA, etc. These lanes usually adjust themselves (PCIe 4 often reduces GPU lanes from 16x to 8x). Generally, 2-3 NVME drives on certain AM4 boards disable SATA ports. Just refer to the motherboard manual to confirm which ports are affected. Using 3× PCIe Gen 3x4 SSDs can work in PCIe Gen 4 with two lanes each and maintain their rated speed.
Your setup varies based on the motherboard design and layout, so identifying it requires checking your specific hardware configuration.
It's an X570 Aorus Extreme with a USB port primarily for DVD burning and flash reading, used to move photos and 8K videos from my Canon camera.
The board features 16 lanes spread across the upper two PCIe ports. When a GPU is placed in the top slot, all 16 lanes are dedicated to it. Adding a GPU or other add-in card in the second slot means both will share x8 lanes, totaling 16 lanes accounted for. The top M.2 slot provides four lanes directly to the CPU, bringing the count to 20. The chipset then connects to the CPU, using the remaining four lanes, which matches the CPU’s full 24 lanes. Beyond the chipset, the third PCIe slot contributes four lanes, and the M.2 slots (slots 2 and 3) share bandwidth with the CPU via the chipset, limiting their simultaneous speed. Unless you frequently handle large databases or file transfers, this should not be a significant concern. Side note: Finding details about this board made me really pleased that Asrock and Gigabyte now include detailed block diagrams for AM5, hoping MSI and ASUS would follow suit.