Qhov ceev ntawm lub cim xeeb yuav txiav txim siab tus nqi uas CPU tuaj yeem ua cov ntaub ntawv. Qhov siab dua lub moos ntsuas ntawm lub cim xeeb, lub kaw lus nrawm dua tuaj yeem nyeem thiab sau cov ntaub ntawv los ntawm lub cim xeeb. Txhua lub cim xeeb yog ntsuas ntawm lub moos tshwj xeeb hauv megahertz uas phim CPU lub cim xeeb interface ceev. Cov txheej txheem cim xeeb tshiab tshiab tam sim no xa mus rau lawv raws li cov ntaub ntawv theoretical bandwidth uas lub cim xeeb txhawb nqa.
Type of Memory Speeds
Txhua cov qauv ntawm DDR nco tau raug xa mus los ntawm lub moos ntsuas tab sis, ntau zaus, cov tuam txhab nco tau pib xa mus rau bandwidth ntawm lub cim xeeb. Cov hom kev nco no tuaj yeem teev nyob rau hauv ob txoj kev. Thawj txoj kev teev cov cim xeeb los ntawm nws lub moos ceev thiab cov qauv ntawm DDR uas siv. Piv txwv li, koj yuav pom hais txog 1600 MHz DDR3 lossis DDR3-1600 uas qhov tseem ceeb tsuas yog hom thiab qhov nrawm ua ke.
Lwm txoj kev ntawm kev faib cov modules yog los ntawm lawv qhov qhab nia bandwidth hauv megabytes ib ob. 1600 MHz nco khiav ntawm qhov theoretical ceev ntawm 12, 800 megabytes ib ob. Yog li DDR3-1600 nco kuj raug xa mus rau PC3-12800 nco. Nov yog qhov hloov pauv luv luv ntawm qee tus qauv DDR nco uas tuaj yeem pom:
- DDR3-1066=PC3-8500
- DDR3-1333=PC3-10600
- DDR3-1600=PC3-12800
- DDR4-2133=PC4-17000
- DDR4-2666=PC4-21300
- DDR4-3200=PC4-25600
Nws yog ib qho tseem ceeb kom paub qhov ceev tshaj plaws ntawm lub cim xeeb uas koj lub processor tuaj yeem txhawb nqa. Piv txwv li, koj lub processor tsuas yog txhawb nqa txog 2666MHz DDR4 nco. Koj tseem tuaj yeem siv 3200MHz rated nco nrog lub processor tab sis cov niam ntawv thiab CPU yuav kho qhov nrawm kom khiav tau zoo ntawm 2666MHz. Qhov tshwm sim yog lub cim xeeb khiav tsawg dua nws qhov peev xwm bandwidth. Yog li ntawd, koj xav yuav lub cim xeeb uas zoo tshaj plaws rau koj lub khoos phis tawj lub peev xwm.
Latency
Rau qhov nco, muaj lwm qhov cuam tshuam rau kev ua haujlwm - latency. Tus nqi no ntsuas lub sijhawm (lossis lub voj voog moos) nws yuav siv lub cim xeeb los teb rau cov lus txib. Feem ntau cov khoos phis tawj BIOS thiab cov chaw tsim khoom nco tau sau qhov no raws li CAS lossis CL ntsuas. Nrog rau txhua tiam ntawm lub cim xeeb, tus naj npawb ntawm cov voj voog rau kev hais kom ua tiav nce. Piv txwv li, DDR3 feem ntau khiav ntawm xya thiab 10 lub voj voog. Tshiab DDR4 nyiam khiav ntawm ze li ob zaug uas nrog latency khiav ntawm 12 thiab 18. Txawm hais tias muaj ntau dua latency nrog lub cim xeeb tshiab, lwm yam xws li lub moos nrawm dua thiab txhim kho thev naus laus zis feem ntau tsis ua rau lawv qeeb dua.
Qhov qis dua qhov latency, lub cim xeeb nrawm dua yog teb rau cov lus txib. Yog li, lub cim xeeb nrog lub latency ntawm 12 yuav zoo dua li qhov zoo sib xws ceev thiab tiam nco nrog lub latency ntawm 15. Qhov teeb meem yog tias cov neeg siv khoom feem ntau yuav tsis tshua pom muaj txiaj ntsig los ntawm qis latency. Qhov tseeb, moos ceev ceev nco nrog me ntsis siab dua latency yuav qeeb me ntsis los teb tab sis muab ntau dua ntawm kev nco bandwidth, uas tuaj yeem muab kev ua tau zoo dua.
