Umumiy xotira chizig'i

Hozirgi vaqtda, PCisSDRAM, DDRSDRAM, RDRAM va boshqafoydalanishlar tiplarida eslab qolingan.

Oncethemainstream-SDRAM

SynchronousDRAM (SDRAM) istheSynchronousdynamicram.
SDRAMmemorystripshavegoldfingerson ikkala tomon, ular to'g'ridan-to'g'ri "memorystriplot" ga kiritilgan. Shuning uchun ushbu tuzilma" ikki qatorli"
Hozirgi kunda ushbu" DIMM" tuzilmasi mavjud.

Front-endbus protsessorini doimiy ravishda takomillashtirish bilan SDRAM yangi protsessorlar tarkibiga kiradi va yangi bozor bozorida uzoq davom etadi.

Bugungi kunda' smainstream-DDRSDRAM

DDRSDRAM (DDRforshort) isaSDRAMthatadoptsthetechnology of DDR (DoubleDataRateSDRAM) .Shu bilan taqqosladikiSDRAM, DDRSDRAMcantransmitDatatwiceinthesameclockcycle, andDRDRcanonlytransmitDataonce.

DDR xotira chiplariSDRAMdan farq qiladi, ular paydo bo'lish xususiyatiga ega va ular o'zlarining qarshilik uzunligiga ega.
Bu' DDRmemorystriphas184pinsandonlyoneingaplingingoldinger, vaSDRAMmemorystriphas168pinsandtwogapsni sozlash.

DDRmemorystick chastotasi bo'yicha, DDR200, DDR266, DDR333, DDR400 va boshqa tiplarga bo'linadi: masalan, SDRAM, DDRisalsosynchronous with the systembusfrequency, butbecueususfubatatatransmission, s26orkDDR36SHz

Maslahat: chastotani tezkor ravishda ishlashi, xotirada barqaror ishlashning chastotasi.
Formemory, yuqori chastota, keng tarmoqli kengligi.

Forexample, DDR266is2100MB / s mavzusi, PC2100.DDR333isPC2700 va DDR400isPC3200 bilan yorliqlangan.

Maslahat: Memorybandwidth," ma'lumotlar uzatish," xotirada ishlash vaqtini belgilash, odatda Gb / s.
Biz xotira kengligi uslubini hisoblash usulini tushuntirib beramiz: xotira kengligi=ish chastotasi × ​​bit kengligi / 8 × n (soat tezligi va uzatish koeffitsienti, DDRkoeffitsient2).

DDRmemorychipsaretoday' smainstreamemoryproducts of the right of the caseclowcostandexcellent performance.

Eskirgan demokratiya-RDRAM

RDRAM (memorybusdynamicrandomaccessmemory) yangi RAMB tomonidan ishlab chiqilgan.
RDRAMhasamuchhcherclockfrequency, ammoSDRAMandDDR-ning 64bitidan bittasi shu bilan birga keladi.

Tashqi ko'rinishidan RDRAMmemorystripissimilartoSDRAMandDDRSDRAMmemorystrip.

Texnik jihatdan, RDRAMarelativ ravishda rivojlangan xotira, lekin yuqori narx, bu narxga mos kelmaydi, chunki bu juda mashhur emas.
Bugungi kunda RDRAM stol usti bozorida ishlaydi.