IC697ACC729---IC697ACC729

IC697ACC729---IC697ACC729

USB 3.0 ExpressCard轉(zhuǎn)接卡

4）即使從主板出來(lái)有USB 3.0的接口，用的移動(dòng)硬盤(pán)也是USB 3.0的，實(shí)際傳輸速度能達(dá)到600MB/S嗎？可以很肯定地告訴你：目前沒(méi)戲！受限于硬盤(pán)的機(jī)械結(jié)構(gòu)，主流的3.5寸7200轉(zhuǎn)500G硬盤(pán)的內(nèi)部傳輸速度不會(huì)超過(guò)150MB/S，2.5寸5400轉(zhuǎn)500G移動(dòng)硬盤(pán)的內(nèi)部傳輸速度更低。我曾在一臺(tái)配備技嘉G41主板、奔騰E5800 CPU、DDR3 1333 2G內(nèi)存、USB 3.0 Express Card的主機(jī)上，用一個(gè)120G配備USB 3.0接口的移動(dòng)硬盤(pán)來(lái)測(cè)試，ATTO顯示讀寫(xiě)速度分別只達(dá)到了45MB/S和47MB/S（瓶頸已經(jīng)出現(xiàn)在硬盤(pán)，這是硬盤(pán)的傳輸速度）。當(dāng)然，有米人士可以買(mǎi)個(gè)SSD固態(tài)硬盤(pán)來(lái)試試，速度會(huì)快不少（新出的SSD，其讀寫(xiě)速度已達(dá)到500MB/S）。

【公　司】： 廈門(mén)泰尼電氣有限公司
【主　營(yíng)】： AB、GE、施耐德等各類(lèi)PLC產(chǎn)品
【價(jià)　格】： 電議
【發(fā)布人】： 張亮
【電  話(huà)】： 18030028083
【所在地】： 福建 - 廈門(mén)
【座　機(jī)】： 0592-6809819
【來(lái)　源】： 供應(yīng)信息 > 電工、電氣 > PLC
【Q　  Q】： 2314094943

 

USB 3.0接口的移動(dòng)硬盤(pán)，在USB 3.0 ExpressCard上的傳輸速度.

USB 3.0線材與USB 2.0的區(qū)別
1. 數(shù)據(jù)傳輸速率, 3.0是SuperSpeed 5.0Gbps,2.0是 1.5Mbps, 12Mbps或480Mbps
2. 數(shù)據(jù)接口, USB 3.0線材是全雙工,獨(dú)立于USB 2.0信號(hào)的四路差分信號(hào),支持同時(shí)雙向數(shù)據(jù)線2.0是半雙工,雙路差分信號(hào), 單向數(shù)據(jù)傳輸, 需要事先協(xié)商好總路線的傳輸方向
3. 信號(hào)線數(shù)目, USB 3.0線材是4路SuperSpeed數(shù)據(jù)線, 2路HighSpeed數(shù)據(jù)線和2路電源及地線2.0是2路LS/FS/HS數(shù)據(jù)線, 2路電源及地線
4. 總線事務(wù)協(xié)議, USB 3.0線材是主機(jī)主導(dǎo)的異步方式的傳輸流量控制, 包傳輸是能顯式地進(jìn)行路由2.0是主機(jī)主導(dǎo)的輪詢(xún)方式的傳輸流量控制, 包傳輸是通過(guò)廣播方式到所有設(shè)備

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