1 additional PCI-Express x1 slot is needed

Anything A pcie 4 x1 slot is a whole lot of bandwidth and could be used for any pcie card with minimal real world bottleneck GPUs would be

PCIe x1: This is the smallest PCIe slot and has a single lane for data communication PCIe x1 slots are often used for less demanding expansion cards, such as

pciex1_1 slot 2 PCIe x16, 1 PCIe x1, 1 Key E for WiFi; Integrated AMD - 1 x PCIe x1 Slot *

pciex1 slot A PCIe x1 slot has only one PCIe lane Although there is only one PCIe lane, the PCIe x1 slot can be used for various low-power PCIe