DDR1 vs DDR2
DDR1 thiab DDR2 yog rau DDR SDRAM tsis ntev los no (ob npaug ntawm cov ntaub ntawv tus nqi synchronous dynamic random nkag nco) tsev neeg ntawm RAMs. Ob lub RAM no khaws cov ntaub ntawv zoo sib xws ntawm DRAM arrays. Thawj tus tswv cuab ntawm tsev neeg no yog DDR1 (feem ntau hu ua DDR). DDR2 ua raws li DDR1. Thiab, DDR3 yog tus tswv cuab uas ua raws DDR2. Txhua RAM tsis sib xws nrog lwm RAM hauv koob. Qhov no txhais tau tias, txhawm rau hloov koj lub RAM ntawm ib qho mus rau lwm qhov (piv txwv li, hloov kho dua tshiab los ntawm DDR1 rau DDR2 RAM) koj yuav tsum tau hloov kho koj lub motherboard tag nrho. DDR tsev neeg ntawm SDRAM muaj kev hloov pauv ntau dua piv rau SDR (ib tus lej cov ntaub ntawv) SDRAM, uas tau siv ua ntej qhia txog DDR. Tshwj xeeb ntawm DDR yog kev siv ob lub twj tso kua mis (hloov ntawm ob sab ntawm lub voj voog moos). Qhov tseeb, "ob npaug ntawm cov ntaub ntawv tus nqi" qhia qhov tseeb tias DDR yog ob zaug nrawm li SDR khiav tib lub moos.
DDR1 yog dab tsi?
DDR1 SDRAM stands rau ob npaug ntawm cov ntaub ntawv tus nqi hom ib synchronous dynamic random nkag tau lub cim xeeb, thiab nws yog thawj DDR SDRAM hauv DDR tsev neeg. Txawm li cas los xij, DDR1 RAM tsis xa mus rau lwm tus tswv cuab hauv DDR tsev neeg vim qhov sib txawv ntawm cov teeb liab, qhov hluav taws xob, thiab lwm yam. DDR1 tuaj yeem mus txog qhov bandwidth ntawm 1600 MB / s (nrog lub moos ceev ntawm 100Mhz). Ua ntej nqa qhov tob ntawm DDR1 yog 2 me ntsis.
DDR2 yog dab tsi?
DDR2 SDRAM stands rau ob npaug ntawm cov ntaub ntawv tus nqi hom ob synchronous dynamic random nkag tau lub cim xeeb. Nws yog tus tswv cuab thib ob hauv DDR tsev neeg. Txawm li cas los xij, DDR2 RAM tsis rov qab sib haum nrog DDR1. Qhov ntawd txhais tau tias koj xav tau ob hom motherboards rau DDR1 thiab DDR2 RAMs. Nws siv ob lub twj tso kua mis hloov cov ntaub ntawv ntawm ob sab ntawm lub moos teeb liab (ntau npaum li DDR1). DDR2 RAM muab kev ua tau zoo ntawm plaub cov ntaub ntawv hloov mus rau ib lub voj voog moos. Yog li DDR2 tuaj yeem muab qhov siab tshaj plaws hloov pauv ntawm 3200 MB / s (nrog rau lub hauv paus moos ceev ntawm 100Mhz).
DDR2 thiab DDR3 yog dab tsi?
DDR1 thiab DDR2 yog thawj thiab thib ob cov tswv cuab koom nrog DDR tsev neeg ntawm RAMs. DDR2 RAM muab 4 cov ntaub ntawv hloov pauv / voj voog, thaum DDR1 RAM tsuas yog 2 cov ntaub ntawv hloov pauv / voj voog. Qhov ntawd txhais tau tias yog lub hauv paus moos ceev yog 100Mhz, ces DDR2 RAM yuav muab 3200 MB / s bandwidth, thaum DDR1 RAM yuav muab tsuas yog 1600 MB / s bandwidth. Ntawm qhov tod tes, DDR1 RAM siv 2.5V ib nti, qhov DDR2 RAM tsuas siv 1.8V ib nti. DDR1 RAM txhawb 100-200 Mhz I / O tsheb npav moos piv rau 200-800 Mhz moos hauv DDR2 RAM. Yog li, feem ntau DDR2 RAM yog qhov nrawm dua thiab siv zog tsawg dua.
Txawm li cas los xij, kev xaiv ntawm DDR1 RAM thiab DDR2 RAM tsis yog ib qho kev txiav txim siab raws li kev ua tau zoo. DDR2 RAM tsis tuaj yeem txuas rau motherboards nrog DDR1 RAMs. Qhov ntawd txhais tau tias, yog tias koj twb muaj DDR1 RAM lawm, koj yuav tsum tau hloov kho lub motherboard kom siv DDR2 RAM (feem ntau ntawm lub sijhawm), thiab qhov ntawd yuav raug nqi, ib yam nkaus. Tab sis qhov tseeb, ob qho tib si Intel thiab AMD tau cog lus rau DDR3 rau yav tom ntej, txhais tau hais tias koj yuav tau hloov kho koj lub motherboard ntawm qee lub sijhawm (yog tias koj tseem muaj DDR1 / DDR2 RAM), thiab hloov mus rau DDR3.
