Unverified85% confidenceFactTime unknown

USB4/Thunderbolt3硬盘盒理论带宽40Gbps，实际NVMe持续读写约2800-3000MB/s，受协议开销无法达到PCIe直连速度，但已远超USB3.2 Gen2的1000MB/s

1

Sources

85%

Confidence

Medium-term (~90 days)

Relevance

-

First Seen

Sources

Related Entities

外置硬盘盒category

Related Claims

UnverifiedThunderbolt 3/4读卡器(40Gbps)相比USB读卡器更贵，但仅在CFexpress这类超高速卡上有意义；纯SD卡用户(UHS-II上限约300MB/s)用USB 3.0读卡器已足够，无需为Thunderbolt付费85% similar UnverifiedThunderbolt读卡器比同规格USB-C版本贵1倍以上，但对SD/microSD卡（最高约300MB/s）没有速度优势，只有读CFexpress时才能发挥Thunderbolt的40Gbps价值84% similar

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