RAM stands rau Random Access Memory , nws yog ib qho tseem ceeb heev hluav taws xob tivthaiv uas yuav tsum tau rau lub computer khiav, RAM yog ib daim ntawv ntawm cia uas CPU siv los khaws cov ntaub ntawv ua haujlwm tam sim no ib ntus. Nws tuaj yeem pom hauv txhua yam khoom siv hauv computer xws li Smartphones, PCs, ntsiav tshuaj, servers, thiab lwm yam.
Txij li thaum cov ntaub ntawv lossis cov ntaub ntawv raug nkag mus, lub sijhawm nyeem thiab sau ntawv tau nrawm dua piv rau lwm qhov nruab nrab cia xws li CD-ROM los yog Hard Disk Drives qhov twg cov ntaub ntawv yog khaws cia los yog retrieved sequentially uas yog nyob deb qeeb ib tug txheej txheem raws li ib tug tshwm sim los mus retrieve txawm ib tug me me npaum li cas ntawm cov ntaub ntawv khaws cia nyob rau hauv nruab nrab ntawm qhov sib lawv liag peb yuav tau mus rau tag nrho ib theem zuj zus.
RAM xav tau lub zog ua haujlwm, yog li cov ntaub ntawv khaws cia hauv RAM yuav raug tshem tawm sai li sai tau thaum lub khoos phis tawj raug kaw. Li no, nws tseem hu ua Volatile Nco los yog Cia ib ntus.
Lub Motherboard tuaj yeem muaj ntau qhov chaw nco, qhov nruab nrab cov neeg siv khoom Motherboard yuav muaj nyob nruab nrab ntawm 2 thiab 4 ntawm lawv.
Txhawm rau kom cov ntaub ntawv lossis cov kev pabcuam raug tua hauv lub computer, nws yuav tsum tau muab tso rau hauv ram ua ntej.
Yog li ntawd, cov ntaub ntawv los yog cov kev pab cuam yog xub muab cia rau hauv lub hard drive ces los ntawm lub hard drive, nws yog retrieve thiab loaded rau hauv RAM. Thaum nws tau thauj khoom, CPU tuaj yeem nkag mus rau cov ntaub ntawv lossis khiav qhov program tam sim no.
Muaj ntau cov ntaub ntawv lossis cov ntaub ntawv uas tau nkag mus ntau dua li lwm tus, yog tias lub cim xeeb tsawg dhau nws yuav tsis tuaj yeem tuav tag nrho cov ntaub ntawv uas CPU xav tau. Thaum qhov no tshwm sim, qee cov ntaub ntawv ntau dhau tau khaws cia rau hauv lub hard drive kom them nyiaj rau lub cim xeeb qis.
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Yog li es tsis txhob ntawm cov ntaub ntawv ncaj qha mus ntawm RAM mus rau CPU, nws yuav tsum tau muab nws los ntawm lub hard drive uas muaj kev nkag mus tau qeeb heev, cov txheej txheem no ua rau lub computer qeeb. Qhov no tuaj yeem daws tau yooj yim los ntawm kev nce tus nqi ntawm RAM muaj rau lub computer siv.
Cov ntsiab lus[ zais ]
Muaj ob hom RAM
kuv) DRAM los yog Dynamic RAM
Dram yog lub cim xeeb uas muaj cov capacitors, uas zoo li lub thoob me me uas khaws hluav taws xob, thiab nws nyob hauv cov capacitors nws tuav cov ntaub ntawv. Vim hais tias lub nruas muaj cov capacitors uas yuav tsum tau ua kom muaj hluav taws xob tas li, lawv tsis tuav tus nqi ntev heev. Vim hais tias cov capacitors yuav tsum tau dynamically refreshed, uas yog qhov uas lawv tau txais lub npe los ntawm. Daim ntawv no ntawm RAM thev naus laus zis tsis tau siv ntxiv lawm vim yog kev txhim kho ntawm kev ua tau zoo thiab nrawm dua RAM technology uas peb yuav tham ua ntej.
ii) SDRAM lossis Synchronous DRAM
Qhov no yog RAM thev naus laus zis uas tau siv dav hauv peb cov khoom siv hluav taws xob tam sim no. SDRAM kuj muaj cov capacitors zoo ib yam li DRAM, txawm li cas los xij, cov Qhov sib txawv ntawm SDRAM thiab DRAM yog qhov ceev, lub qub DRAM tshuab khiav qeeb los yog ua haujlwm asynchronously tshaj CPU, qhov no ua rau kev hloov ceev kom lag vim tias cov teeb liab tsis sib koom ua ke.
SDRAM khiav hauv sync nrog lub kaw lus moos, uas yog vim li cas nws thiaj li nrawm dua DRAM. Tag nrho cov teeb liab raug khi rau lub kaw lus moos kom lub sijhawm tswj tau zoo dua.
RAM yog ntsaws rau hauv lub motherboard nyob rau hauv daim ntawv ntawm cov neeg siv tshem tawm modules uas hu ua SIMMs (Ib leeg hauv kab nco modules) thiab DIMMs (dual in-line memory modules) . Nws yog hu ua DIMMs vim tias nws muaj ob kab ntawm cov pins no ib sab ntawm txhua sab thaum SIMMs tsuas muaj ib kab ntawm tus pins ntawm ib sab. Txhua sab ntawm lub module muaj xws li 168, 184, 240 lossis 288 tus pins.
Kev siv SIMMs tam sim no tsis siv lawm txij li lub cim xeeb muaj peev xwm ntawm RAM ob npaug nrog DIMMs .
Cov DIMMs no tuaj yeem muaj peev xwm nco tau sib txawv, uas nyob qhov twg ntawm 128 MB txog 2 TB. DIMMs hloov 64 cov ntaub ntawv ib zaug piv rau SIMMs uas hloov 32 cov ntaub ntawv ib zaug.
SDRAM kuj tseem nyob ntawm qhov sib txawv, tab sis ua ntej peb delve rau hauv qhov ntawd, cia peb nkag siab tias cov ntaub ntawv txoj kev yog dab tsi.
Qhov ceev ntawm CPU yog ntsuas nyob rau hauv lub voj voog, yog li nyob rau hauv ib lub voj voog moos, xws li 32 lossis 64 cov ntaub ntawv tau pauv ntawm CPU thiab RAM, qhov kev hloov pauv no hu ua cov ntaub ntawv txoj kev.
Yog li qhov siab dua lub moos ceev ntawm CPU lub computer yuav nrawm dua.
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Ib yam li ntawd, txawm tias SDRAM muaj lub moos ceev uas nyeem thiab sau tuaj yeem tshwm sim. Yog li qhov nrawm dua ntawm RAM lub moos nrawm dua qhov kev ua haujlwm sai dua tshwm sim txhawb lub processor kev ua haujlwm. Qhov no yog ntsuas nyob rau hauv tus naj npawb ntawm cov voj voog nws tuaj yeem ua tau suav hauv megahertz. Yog li, yog tias RAM tau ntsuas ntawm 1600 MHz, nws ua tau 1.6 billion cycles ib ob.
Yog li, peb vam tias qhov no yuav pab koj nkag siab tias RAM thiab ntau hom RAM technologies ua haujlwm li cas.
Elon Decker Elon yog tus kws sau ntawv thev naus laus zis ntawm Cyber S. Nws tau sau cov lus qhia yuav ua li cas txog 6 xyoo tam sim no thiab tau hais txog ntau yam. Nws nyiam npog cov ncauj lus hais txog Windows, Android, thiab cov lus qhia tshiab thiab cov lus qhia.