PCIe Gen 4 vs Gen 3 Slots, Speeds

Run PCIe x8 NIC in x4 slot? - Hardware Hub 4x pcie slot 1 SSD Slots 5 x · 4 x · 3 x · 2 x · 1 x Graphics 2 Connector; EZ-Latch：PCIe x16 Slot with Quick Release Design; Fast Networks：GbE 4x4 slot pg PCIe boards can fit into slots designed for their lane configuration or higher Plugging a x4 PCIe into a x16 slot is acceptable

4x4 turbo slot Should work fine, it's the same as putting a 16x card in to a slot that's only wired for 8x or 4x, you don't get the full bandwidth but it will