Apple A5 vs A5X processors
Apple A5 thiab A5X yog Apple qhov tseeb System ntawm Chips (SoC) tsim los tsom rau lawv cov khoom siv tes. Hauv Layperson lub sij hawm, SoC yog lub computer ntawm ib qho IC (Integrated Circuit, aka nti). Technically, SoC yog ib qho IC uas sib koom ua ke xws li microprocessor, nco, tawm tswv yim / tawm ntawm lub khoos phis tawj thiab lwm lub tshuab uas ua haujlwm rau hluav taws xob thiab xov tooj cua.
Ob lub ntsiab lus tseem ceeb ntawm A5 thiab A5X SoCs, theej MPSoCs (Multi Processor SoCs) yog lawv ARM raws CPU (Central Processing Unit, aka processor) thiab PowerVR raws GPU (Graphics Processing Unit). Ob qho A5 thiab A5X yog raws li ARM's v7 ISA (cov lus qhia teeb tsa, ib qho uas yog siv los ua qhov chaw pib ntawm kev tsim cov processor). CPU thiab GPU nyob rau hauv ob qho tib si A5 thiab A5X yog tsim nyob rau hauv lub semiconductor technology hu ua 45nm (tsis tau kuaj xyuas rau A5X). Txawm hais tias Apple tsim lawv, Samsung tsim lawv raws li kev thov los ntawm Apple.
Apple A5
A5 tau muag thawj zaug hauv lub Peb Hlis 2011, thaum Apple tso tawm nws cov ntsiav tshuaj tshiab kawg, iPad 2. Tom qab Apple lub iPhone tsis ntev los no clone, iPhone 4S tau tso tawm nrog Apple A5. Raws li kev tawm tsam rau nws thawj A4, A5 muaj dual cores hauv nws ob qho tib si CPU thiab GPU. Yog li, technically Apple A5 tsis yog SoC xwb, tab sis MPSoC (Multi Processor System ntawm Chip). A5's dual core CPU yog raws li ARM Cotex-A9 processor (uas siv ARM v7 ISA) thiab nws cov tub ntxhais dual GPU yog raws li PowerVR SGX543MP2 cov duab processor. A5's CPU feem ntau yog clocked ntawm 1GHz (txawm hais tias lub clocking siv zaus scaling thiab yog li ntawd lub moos ceev yuav hloov ntawm 800MHz mus 1GHz, raws li lub load, lub hom phiaj txuag hluav taws xob) thiab nws GPU yog clocked ntawm 200MHz. A5 muaj 32KB L1 cache nco ib core thiab 1MB sib koom L2 cache. A5 los nrog 512MB DDR2 nco pob uas feem ntau clocked ntawm 533MHz.
Apple A5X
Lub iPad tshiab (aka iPad 3 lossis iPad HD), thawj cov khoom siv hluav taws xob uas yuav tau nruab nrog A5X MPSoC yuav raug muag thawj zaug nyob rau nruab nrab Lub Peb Hlis 2012 (thaum lub lim tiam no). Thaum lub sijhawm lub iPad tshiab tshaj tawm ntawm 7th Lub Peb Hlis 2012, Apple tau tshaj tawm tias lawv yuav siv Apple A5X processor los tsav lub cuab yeej. Kua A5X muaj dual core CPU zoo li A5 thiab yog li ntawd tsis mus ua qhov txawv heev piv rau nws yav dhau los A5 MPSoC. Nws yog ib qho tsim nyog yuav tsum nco ntsoov tias, qhov no yog tawm tsam qhov kev ntseeg yav dhau los uas Apple yuav siv lub tshuab ua haujlwm plaub plaub, tus qauv ntawm 2012 MPSoCs, rau nws lub iPad tshiab. Raws li cov ntaub ntawv tawm mus txog tam sim no, Apple yuav teev nws A5X CPUs ntawm 1.2 GHz as opposed to 1GHz hauv A5. Txawm hais tias A5X muaj dual core CPU, GPU siv (uas yog lub luag haujlwm rau cov duab ua haujlwm) yog plaub core PowerVR SGX543MP4. Yog li ntawd, cov duab ua tau zoo ntawm A5X yuav yog qhov kev xav tau ob npaug piv rau Apple A5 processor. Qhov tseeb, "X" hauv A5X sawv cev rau cov duab. Yog li ntawd, A5X yog ib tug high-end graphics processor uas yuav tsum txhawb lub tshiab iPad HD graphics (lub retina zaub uas Apple tab tom qhia nyob rau hauv lub tshiab iPad, thawj nyob rau hauv cov ntsiav tshuaj PCs). A5X yuav tsum tau xa nrog 32KB L1 ntiag tug cache nco ib tus tub ntxhais (rau cov ntaub ntawv thiab kev qhia cais) thiab 1MB sib koom L2 cache. Nws tseem yuav cia siab tias yuav tau ntim nrog 512MB nco.
Kev Sib Piv Ntawm Apple A5 thiab Thov A5X
| Apple A5 | Apple A5X | |
| Hnub tso tawm | March 2011 | March 2012 |
| Type | MPSoC | MPSoC |
| Thawj Device | YiPad2 | The new iPad (iPad3 or iPad HD) |
| Lwm yam khoom siv | iPhone 4S, 3G Apple TV | Tsis tau muaj |
| ISA | ARM v7 | ARM v7 |
| CPU | ARM Cortex-A9 (dual core) | ARM Cortex-A9 (dual core) |
| CPU's Clock Speed | 0.8-1.0GHz (ntau zaus scaling enabled) | 1.2GHz |
| YGPU | PowerVR SGX543MP2 (dual core) | PowerVR SGX543MP4 (quad core) |
| GPU's Clock Speed | 200MHz | Tsis muaj |
| CPU/GPU Technology | 45nm | 45nm |
| L1 Cache | 32kB kev qhia, 32kB cov ntaub ntawv | 32kB kev qhia, 32kB cov ntaub ntawv |
| L2 Cache | 1MB | 1MB |
| Memory | 512MB DDR2 (LP), 400MHz | 512MB DDR2, 533MHz |
Summary
Hauv cov ntsiab lus, Apple A5X xav tias yuav ua tau zoo dua hauv nws cov duab piv rau Apple A5 thaum ua tau zoo me ntsis hauv kev suav tsis tu ncua piv rau A5 vim nws lub moos nrawm dua. Kev sib piv ntxiv raws li cov qauv ntsuas tsuas yog ua tau tom qab A5X tso tawm thiab yog li peb yuav tsum tau tos kom txog thaum nws tso tawm hauv iPad3 tshiab tom qab lub lim tiam no (16 Lub Peb Hlis 2012).
