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选购CFexpress卡应搭配对应协议的读卡器，Type B读卡器普遍支持USB 3.2 Gen2×2（20Gbps）才能跑满卡速，用普通USB读卡器传输会成为速度瓶颈

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Unverified读取CFexpress Type B卡需选USB 3.2 Gen2 (10Gbps)以上接口，USB 3.0(5Gbps)读卡器会成为瓶颈，无法跑满CFexpress卡1700MB/s的读取速度89% similar UnverifiedCFexpress Type B读卡器需USB 3.2 Gen2（10Gbps）或雷电接口才能发挥1000MB/s以上速度，USB 3.0/3.1 Gen1（5Gbps）会成为瓶颈87% similar Unverified读CFexpress Type B卡必须选USB 3.2 Gen2（10Gbps）或雷电3/4接口读卡器，USB 3.0（5Gbps）会将1700MB/s的卡速拦腰砍至约450MB/s，浪费卡性能87% similar UnverifiedCFexpress Type B卡需要USB 3.2 Gen2或雷电接口才能发挥（实际读取约1500-1700MB/s），若接USB 3.2 Gen1读卡器会被限制在约900MB/s以下，浪费CFexpress性能84% similar UnverifiedUSB 3.2 Gen1接口理论带宽5Gbps(实测约450MB/s)，读UHS-II SD(300MB/s)足够，但读CFexpress会严重限速；按最快的卡选接口84% similar

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