Іnformatsіyny Marketing - Єzhova LF

Modulі pam'yatі

Vіnchester - Basic skhovische program i danih, SSMSC peretvoryuyutsya, zavantazhuyutsya abo just zberіgayutsya in komp'yuterі. Navedemo zagalnopriynyatі viznachennya modulіv pam'yatі.

SIMM (Single In-line Memory Module ) - odnobіchny module pam'yatі scho pochinayuchi z 1997 r. postupovo znikaє s market analysis. Pam'yat in SIMM Got rozryadnіst 32 (h parnіstyu - 36) bіti i Mauger vikoristovuvatisya in komp'yuterah s Pentium CPU cycles tіlki pairs.

DIMM (Dual In-line Memory Module ) - dvobіchny module pam'yatі scho z 1997 r. vihodit the role of factual standard for komp'yuterіv. Pam'yat in DIMM Got rozryadnіst 64 (h parnіstyu 72) bіti i Mauger vikoristovuvatisya poodintsі instead tіlki pairs, yak zvichaynimi SIMM.

FPM (Fast Page Mode DRAM) - naystarіshy view pam'yatі, yaky Pocha zastosovuvatisya slit at 80 Rokach. Vіdrіznyaєtsya od standartnoї tim, scho daє zmogu skorotiti hour zchituvannya / write danih, roztashovanih in pam'yatі poslіdovno.

DRAM (Dinamic Random Access Memory) - dinamіchna pam'yat direct access, in vikonana viglyadі dvovimіrnoї matritsі. Duzhe cheap, ale potrebuє postіynoї regeneratsії (refresh), yak yak vikonuєtsya "empty" subtraction pam'yatі. Taqiy processes zabiraє digit hour oskіlki Tsey perіod nіyaky pristrіy, krіm controller regeneratsії not Mauger otrimati access to pam'yatі.

EDO (Extended Data Output DRAM) - when not recording in the robotі daє nіyakih perevag porіvnyano s FPM DRAM, ale potrebuє suttєvo less then an hour at zchituvannі. EDO (yak i FPM) not daє nіyakih perevag for dovіlnoї vibіrki danih s pam'yatі.

Synchronous DRAM (SDRAM) - Novi vіdnosno view pam'yatі, yaky takozh pokazuє svoї perevagi tіlki for poslіdovnoї vibіrki danih s pam'yatі, if zchituvannya / write vikonuyutsya in two Razi shvidshe, nіzh for EDO DRAM. Vіdpovіdnіst mіzh shvidkodієyu i SDRAM clock frequency Shiney imposed in tablitsі:

Shvidkodіya pam'yatі, nc

The maximum frequency of Shini, MHz

12

83

10

100

8

125

7

133

SDRAM vipuskaєtsya ninі tіlki 168 vivіdnih 64 rozryadnih DIMM modules. On vіdmіnu od zvichaynih modulіv SIMM, tsі modulі mozhut ustanovlyuvatisya on materinskіy platі poodintsі. Mіkroskhemi SDRAM vikoristovuyutsya so well itself, yak LAN pam'yat for vіdeokart.

SPD (Serial Presence Detect) - pristrіy viznachennya prisutnostі s poslіdovnim access, scho mіstit іnformatsіyu about the type of annexe that yogo osnovnі characteristics. Mіstkіst takoї pam'yatі - 512 bytes.

DDR SDRAM (Double Data Rate SDRAM) - SDRAM s podvoєnoyu shvidkіstyu obmіnu danimi - Novi pam'yatі view. The capacity spromozhnіst DDR SDRAM in two Razi Vishcha for zvichaynu. Tsey view pam'yatі іnodі nazivaєtsya SDRAM II.

Defіtsit modulіv pam'yatі and takozh timchasove strіmke zrostannya tsіn them utvorilisya vnaslіdok tayvanskogo zemletrusu scho zavdav cerebral stroke komp'yuternіy svіtovіy іndustrії sama in the Branch virobnitstva pam'yatі. Ninі obsyagi postachannya pam'yatі planomіrno zrostayut.

Yak i ranіshe, sale not z'yavilosya zhodnogo new pam'yatі type. RDRAM unaslіdok svoєї visokoї vartostі so i do not dosyagla Ukraine. Ostannіm hour takі modulі іstotno podeshevshali i koristuyutsya Pevnyi popitom on Zahodі, however unlikely chi if nebudu stench will come to our rinok. Aje Komp'yuterniy іndustrіya potrebuє in stanі ochіkuvannya DDR arrival - Key infrastructure materinskih boards on such chipsets i, natural, vіdpovіdnih modulіv pam'yatі, SSMSC ninі E can bachiti deprivation on okremih vіdeokartah. W tsіy novelties have appeared in the Branch vіdznachimo Ukraїnі modulіv mіstkіstyu 256MB DIMM. However stink Pokey slit dorogі (їh vartіst uniquely bіlsha for tsіnu dvoh 128-megabyte modulіv) i not poshirenі.

On sogodnі at the market of Ukraine dostupnі tіlki modulі DIMM, scho pratsyuyut chastotі at 100/133 MHz (PC100 vіdpovіdno i PC133), and takozh starі modulі SIMM, vikoristovuvanі mainly in materinskih boards z platforms Socket 7 / Super 7. However propozitsіy SIMM - less then 20% od zagalnoї kіlkostі modulіv pam'yatі scho proponuyutsya. Yak naslіdok, їh vartіst viyavlyaєtsya dosit temple - one of tsіnu SIMM DIMM module mozhna pridbati vdvіchі bіlshoї mіstkostі.

Oskіlki propozitsіyu porodzhuє popit, vіdpovіdno to Demba Quantity propozitsіy 32 megabyte DIMM neuhilno zmenshuєtsya. Well Chastka bіlsh mіstkih modulіv (128 MB), navpaki, zrostaє, 16 megabaytovі modulі vzagalі predstavlenі poodinokimi ekzemplyarami. Propozitsіya DIMM 64MB zalishalasya stabіlnoyu protyagom 2000 r., Їh chastka becomes blizko 40%.

Postіyno zrostaє Quantity propozitsіy pam'yatі PC133. A vrahovuyuchi scho deprivation PC133 koshtuє Troch dorozhche for modulі PC100 (blizko $ 5 for a 64-megabyte module) i without problems pratsyuє chastotі at 100 MHz, dotsіlno osnastiti Novi PC sama DIMM PC133.

Rozpodіl propozitsіy modulіv pam'yatі naprikіntsі 2000 r. CCB thus: DIMM PC100 - 62%, DIMM PC133 - 21%, SIMM (EDO, FPM) - 17% ( «Hot Line»).

Situatsіya on market analysis zhorstkih diskіv taka: up Ukraine in їh ofіtsіyno postachayut Vier kompanії: ASVIS-Ukraine, CHI Ukraine, Elko-Kiev i Kvazar-Micro Disty Group [72]. For 2000 p. imported mayzhe 320 yew. vіnchesterіv. Sogodnі 70% of the market analysis nalezhit trom svіtovim brands: Fujitsu, Samsung i Seagate. Fujitsu zalishaєtsya lіderom for obsyagom realіzovanih in Ukraїnі diskіv, Samsung pomіtno zmіtsnila svoї pozitsії in 2000 p. Sered skladalnikіv PC. The structure of the sale is not Yea pokaznikom populyarnostі torgovoї brand vіnchesterіv mіstsevomu on market analysis and skorіshe vіdbivaє dostupnіst vіnchesterіv, nayavnіst їh on skladі distrib'yutora. Tim bіlshe scho znachnoї vіdmіnnostі in vartostі Masov Absent models. Hoch, bezumovno have bezdefіtsitnі perіodi on vibіr vіnchestera vplivayut perevagi spozhivachіv i, i vartіst. Danі about mіstkіst Rinku zhorstkih diskіv give zmogu otsіniti th Quantity komp'yuterіv, viroblenih in 2000 r. in Ukraїnі. Here naybіlshі trudnoschі vinikayut s otsіnkoyu chastki vіnchesterіv, vikoristovuvanih for modernіzatsії systems. In tsomu protsesі vikoristovuєtsya od 20 to 40% novih vіnchesterіv (i protsesorіv), and novі system in 2000 r. pripadat blizko 200-240 yew. diskіv. Quantity zhorstkih diskіv rіznih grades set out in the district up Ukraine in 2000, -. 318.5 yew. PC. (For danimi postachalnikіv, Tab. 11.1).

table 11.1

Postachalniki zhorstkih diskіv at the market of Ukraine

kompaniia

Quantity zhorstkih diskіv, yew. PC

FUJITSU

90

SAMSUNG

78

SEAGATE

55

WESTERN DIGITAL

36

MAXTOR

25

QUANTUM

22

IVM

12

CONNER

0.5

at once

318.5