在PCIe 3.0 x16带宽下（相当于PCIe 4.0 x8）性能损失大约在2%左右。因此，预计本代的RTX 5090在PCIe 4.0 x16（即PCIe 5.0 x8等效带宽）条件下也能接近其峰值 ...

supporting the PCIe 3.0 standard instead of PCIe 2.0 while also providing dual M.2 slots. The Seeed Studio PCIe 3.0 to Dual M.2 HAT [h/t CNX] costs just $45 per the official store page.