Unverified50% confidenceCautionTime unknown
不要为老平台（PCIe 3.0主板）购买Gen4扩展卡指望提速——扩展卡不会突破主板PCIe版本上限，Gen4 SSD在Gen3插槽只能跑约3.5GB/s
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UnverifiedM.2转接卡本身不带PCIe通道复用，插在物理x16但电气x4的插槽时，多盘位会受限于x4总带宽（约4GB/s），共享给多块盘会各自降速74% similarUnverified接口协议决定实际速度：USB 3.2 Gen1(=USB3.0)理论5Gbps约500MB/s，Gen2达10Gbps约1000MB/s，Gen2x2达20Gbps；买了PCIe SSD却只配Gen1接口是性能浪费，选购时接口协议要匹配盘体速度74% similarUnverifiedUSB扩展卡/网卡等低速扩展卡插在PCIe x1插槽即可，不要占用x16显卡插槽；而M.2 NVMe扩展卡需要x4以上，二者带宽需求差异巨大70% similar
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