USB 3, USB 3.1, Gen 1, Gen 2, USB hom-C: Nws txhais li cas?
Nqe Lus Nug: USB 3 yog dab tsi?
USB 3 yog dab tsi thiab nws yuav ua haujlwm nrog kuv cov laus USB 2 li?
Teb:
USB 3 yog qhov thib peb loj iteration ntawm USB (Universal Serial Bus) txheem. Thaum nws xub pib ua ntej, USB muab qhov kev txhim kho zoo kawg nkaus hauv qhov kev cog lus ntawm lub computer. Yav dhau los, cov kis tau zoo thiab cov chaw nres nkoj tau sib txig yog qhov; txhua tus yuav tsum nkag siab ntau ntawm ob qho tib si lub cuab yeej thiab lub computer tuav lub cuab yeej thiaj li teeb tsa txoj kev txuas.
Thaum muaj lwm cov kev sib txuas los tsim kom muaj kev sib txuas tau yooj yim rau cov computers thiab peripherals, USB yog kab tias thawj ua tiav ib qho qauv ntawm txhua lub computer, tsis hais tus kws muag khoom.
USB 1.1 pib lub npus duav los ntawm kev sib txuas nrog kev sib txuas ua ke thiab ua si uas txhawb siab ntawm 1.5 Mbit / s mus rau 12 Mbits / s. USB 1.1 tsis yog ib qho kev ua txhaum ntau heev, tab sis nws yog ntau tshaj li qhov ua tau ceev cov nas, cov khoom siv hauv keyboards , cov khoom siv, thiab lwm cov khoom qeeb qeeb.
USB 2 upped ante los ntawm muab txog li 480 Mbit / s. Txawm hais tias lub sab saum toj ceev tsuas pom nyob rau hauv tawg ntho, nws yog ib qho tseem ceeb txhim kho. Sab nraud cov drives siv USB 2 ua ib txoj kev nrov ntawm kev muab cia. Nws txoj kev ua kom zoo dua qub thiab kev siv bandwidth ua USB 2 zoo xaiv rau ntau lwm cov khoom pliaj, nrog rau kev sib tw, cov koob yees duab, thiab duab cams.
USB 3 coj theem tshiab ntawm kev ua tau zoo, nrog cov ntaub ntawv hloov tshiab hu ua Super Speed, uas muab USB 3 ib qho theoretical saum ceev ntawm 5 Gbits / s.
Hauv kev siv sij hawm, kev ceev saum toj kawg nkaus ntawm 4 Gbits / s yuav tsum tau, thiab ib qho kev hloov mus txuas ntxiv ntawm 3.2 Gbits / s yog achievable.
Qhov ntawd yog qhov yoo txaus kom tiv thaiv feem ntau ntawm cov neeg tsav tsheb tsis sib thooj ntawm kev sib txuas nrog cov ntaub ntawv. Thiab nws ceev ceev txaus siv rau feem ntau ntawm SATA -tsawg SSDs , tshwj xeeb tshaj yog tias koj qhov chaw sab nraud txhawb UASP (USB txuas SCSI Protocol) .
Lub qub adage tias sab nraud drives yog qeeb dua internals yog tsis ntev ib txwm rooj plaub.
Raw ceev tsis yog qhov txhim kho hauv USB 3. Nws siv ob txoj kev ua cov ntaub ntawv, ib qho xa tawm thiab ib qho kom tau txais, yog li koj tsis tas yuav tau tos tsheb ciav hlau ua ntej xa cov ntaub ntawv.
USB 3.1 Gen 1 yeej tseem zoo tib yam li USB 3. Nws muaj cov nqi sib hloov (5 Gbits / s theoretical max), tiam sis tuaj yeem ua ke nrog USB Hom-C connector (cov lus hauv qab no) kom muaj txog li 100 watts ntawm ntxiv zog, thiab kev muaj peev xwm muaj xws li DisplayPort lossis HDMI video teeb liab.
USB 3.1 Gen 1 / USB Hom-C yog qhov chaw nres nkoj kev siv ua nrog rau lub 12-inch MacBook , uas yog tib qho hloov ceev raws li USB 3.0 chaw nres nkoj, tiam sis ntxiv kev muaj peev xwm los tswj cov duab DisplayPort thiab HDMI , nrog rau kev muaj peev xwm los ua ib qho chaw them nyiaj rau lub MacBook lub roj teeb .
USB 3.1 Gen 2 doubles theoretical hloov cov nqi ntawm USB 3.0 rau 10 Gbits / s, uas yog tib yam hloov ceev raws li thawj Thunderbolt specification. USB 3.1 Gen 2 tuaj yeem nrog cov USB USB-C connector tshiab nrog rau kev ua haujlwm tshiab, nrog rau DisplayPort thiab HDMI video.
USB hom-C (tseem hu ua USB-C ) yog tus qauv siv rau qhov chaw nres nkoj compact USB uas siv tau (tab sis tsis tas yuav tsum tau) nrog USB 3.1 Gen 1 lossis USB 3.1 Gen 2 specifications.
Qhov chaw nres nkoj ntawm USB-C thiab cable specifications yuav tsum muaj kev sib txuas lus, yog li lub USB-C cable tau txuas nrog txhua qhov kev taw qhia. Qhov no ua rau ntsaws ib kab ntawv USB-C mus rau hauv qhov chaw nres nkoj ntawm USB-cias tseem yoojyim.
Nws kuj muaj peev xwm los txhawb cov ntaub ntawv ntau dua, muab cov ntaub ntawv nce mus txog 10 Gbits / s, as Well as muaj peev xwm los txhawb DisplayPort thiab HDMI video.
Last but not least, USB-C muaj peev xim loj zog (txog li 100 watts), cia lub chaw nres nkoj USB-C siv los siv hluav taws xob los sis them nqi feem ntau ntawm cov computers.
Thaum USB-C txhawb nqa cov ntaub ntawv ntau dua thiab video, nws tsis muaj qhov yuav tsum tau muaj li nrog USB-C connectors kom siv tau lawv.
Yog li, yog hais tias ib tug ntaus ntawv muaj lub USB-C connector, qhov ntawd tsis txhais tau tias qhov chaw nres nkoj txhawb kev yees duab, lossis Thunderbolt zoo li ceev. Kom paub tseeb tias koj yuav tsum tshawb xyuas ntxiv, kom paub tseeb tias nws yog ib qho USB 3.1 Gen 1 los yog USB 3 Gen 2 chaw nres nkoj, thiab qhov ua tau siv lub tshuab hluav taws xob siv.
USB 3 Architecture
USB 3 siv lub npav ntau qhov uas tso cai rau USB 3 tsheb khiav thiab USB 2 tsheb khiav mus dhau lub cabling ib txhij. Qhov no txhais tau hais tias tsis zoo li qub versions ntawm USB, uas ua hauj lwm nyob rau sab saum toj ceev ntawm qhov qeeb ntaus ntawv txuas, USB 3 muaj peev xwm zip raws txawm tias thaum lub iPad 2 ntaus ntawv txuas nrog.
USB 3 kuj muaj cov qauv siv rau hauv hluav taws xob FireWire thiab Ethernet: txhais tau tias muaj peev xwm sib txuas rau cov tswv yim khiav lag luam. Qhov no muaj peev xwm ua rau koj siv USB 3 nrog ntau lub computer thiab ib qho ntawm ib lub sijhawm. Thiab ib qho rau Macs thiab OS X, USB 3 yuav tsum ceev cov hom phiaj hom disk, ib txoj kev uas Kua siv thaum hloov cov ntaub ntawv los ntawm Mac dua tshiab mus rau ib lub tshiab.
Compatibility
USB 3 yog tsim los ntawm qhov pib tuaj txhawb USB 2. Tag nrho USB 2.x cov khoom siv yuav tsum ua haujlwm thaum txuas nrog Mac nrog nruab nrog USB 3 (los yog ib lub computer nruab nrog USB 3, rau qhov teeb meem). Ib yam li, USB 3 peripheral yuav tsum tau ua haujlwm nrog lub USB 2 chaw nres nkoj, tab sis qhov no kuj nce mentsis, vim nws nyob ntawm hom USB 3 ntaus ntawv. Ntev npaum li lub cuab yeej tsis yog nyob ntawm ib qho kev txhim kho hauv USB 3, nws yuav tsum ua hauj lwm nrog USB 2 chaw nres nkoj.
Yog li, li cas txog USB 1.1? Raws li kuv tau qhia, USB 3 specification tsis sau cov nyiaj them yug rau USB 1.1.
Tab sis feem ntau cov khoom siv, nrog rau cov cuab yeej niaj hnub thiab cov nas, yog USB 2 li. Koj yuav zaum tau khawb zoo zoo nkauj hauv koj txee dai khaub ncaws kom nrhiav tau ib lub USB 1.1 device.
USB 3 thiab koj lub Mac
Kua xaiv txoj hau kev me ntsis kom sib txuas nrog USB 3 rau hauv nws cov khoom Mac. Yuav luag tag nrho tam sim no tiam Mac qauv ua siv ntawm USB 3.0 cov chaw nres nkoj. Qhov tsuas yog lub 2015 MacBook, uas siv USB 3.1 Gen 1 thiab ib tug USB-C connector. Tsis muaj Mac qauv tam sim no muaj nplooj siab USB 2 ports, raws li koj feem ntau pom hauv lub PC arena. Kua siv tib lub USB USB connector feem ntau ntawm peb paub txog; qhov txawv yog hais tias USB 3 version ntawm no connector muaj tsib lub koob ntxiv uas txhawb cov kev ua haujlwm siab ntawm USB 3. Qhov no txhais tau tias koj yuav tsum siv USB 3 cabling kom tau USB 3 kev ua tau zoo. Yog tias koj siv lub qub USB 2 cable uas koj pom nyob rau hauv ib lub thawv rau hauv koj lub txee, nws yuav ua hauj lwm, tab sis tsuas yog ntawm USB 2 speeds.
Qhov chaw nres nkoj USB-C siv rau lub 2015 MacBook yuav tsum tau cable adapters mus ua haujlwm nrog cov laus USB 3.0 lossis USB 2.0 li.
Koj tuaj yeem pom txog USB 3 cabling los ntawm lub logo kos nyob rau hauv lub cable. Nws muaj cov tsiaj ntawv "SS" nrog lub cim USB tom ntej ntawm cov ntawv nyeem. Rau tam sim no, koj tsuas pom cov kab xiav USB 3, tab sis qhov ntawd yuav hloov, vim hais tias tus qauv USB tsis tau xim tshwj xeeb.
USB 3 tsis yog qhov kev txuas high-speed peripheral uas kua siv. Macs feem ntau muaj Thunderbolt cov chaw nres nkoj uas khiav lag luam ntawm kev nce mus txog 20 Gbps.The 2016 2016 MacBook Pro ua lag luam Thunderbolt 3 cov chaw nres nkoj uas txhawb zog ntawm 40 Gbps. Tab sis vim qee cov neeg ua lag luam tseem tsis tau muab ntau Thunderbolt peripherals, thiab cov uas lawv muab yog kim heev.
Rau tam sim no, tsawg kawg, USB 3 yog tus nqi ntau dua-meej pem mus rau kev sib txuas ceev nrooj.
| Mac Qauv | USB 3 | USB 3.1 / Gen1 | USB 3.1 / Gen2 | USB-C | Thunderbolt 3 |
|---|---|---|---|---|---|
| 2016 MacBook Pro | X | X | X | X | |
| 2015 MacBook | X | X | |||
| 2012-2015 MacBook Cua | X | ||||
| 2012-2015 MacBook Pro | X | ||||
| 2012-2014 Mac mini | X | ||||
| 2012-2015 iMac | X | ||||
| 2013 Mac Pro | X |