This setup connects a USB 3.1 Gen 2 device at 10 Gbps to a PCIe 2.0 expansion card.
This setup connects a USB 3.1 Gen 2 device at 10 Gbps to a PCIe 2.0 expansion card.
Hey there! I see you're dealing with some speed questions about your external SSDs. It sounds like you're trying to figure out whether using a PCIe expansion card could really boost performance or if there are other factors at play. The USB3.0 port you're using is limited to 10Gbps, while PCIe Gen2 can reach up to 500Mbps—so yes, the PCIe card might be the bottleneck. As for whether PCIe shares the same bus as your SSD, it depends on how they’re connected and managed by your system. Overloading the USB expansion card could potentially impact other devices, like GPUs, but usually not severely unless you're pushing hardware to its limits. If you're happy with your specs and just want to test the card, go for it—just keep an eye on usage. Let me know if you need more details!
This card supports PCIe 3.0 and x4, delivering roughly four times the data rate of a single lane—around 4GB/s overall. Since your motherboard only has one PCIe 2.x x4 port, it will provide half that capacity, but still more than enough for a 20Gbps USB connection. The slot is integrated into the chipset, so bandwidth will be shared with other components such as the second M.2 drive, network interface, and SATA ports. This sharing usually goes unnoticed.