Unverified90% confidenceTradeoffTime unknown
直播用途优先选USB接口采集卡，即插即用无需拆机；PCIe采集卡延迟更低（可低至个位数毫秒）但仅限台式机内置，适合对同步要求极高的多机位切换场景
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90%
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Unverified延迟越低通常需要硬件编码或PCIe直连，成本更高且便携性差；纯直播场景延迟不敏感，USB外置卡配直通口即可，无需为超低延迟买内置卡90% similarUnverified直播用途优先选USB外置采集卡，采集延迟应＜100ms才能保证声画同步和实时监看不影响操作89% similarUnverifiedPCIe内置采集卡延迟低（可低于1帧）适合本机直播，但只能装在台式机；USB外置卡便携可接笔记本，但延迟通常在几十到上百毫秒，需要用直通口看画面而非软件预览85% similarUnverified电竞用途优先选PCIe接口网卡而非USB，PCIe直连主板总线延迟更低且供电稳定，USB网卡在高负载下易出现丢包和延迟抖动84% similarUnverifiedUSB采集卡有编码延迟（普遍80-200ms），只适合直播不适合竞技游戏本地实况；追求低延迟本地游玩应选PCIe内置采集卡（延迟可低于10ms硬件直通）84% similar
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