ATI Radeon HD 4850: Yam ntxwv, nta thiab xyuas

Neeg tsim nyog uas lwm graphics tsuj roj GeForce 8800GTS thiab GeGorce 9800GTX los ntawm NVIDIA los ntawm cov legendary Canadian tsim nyob rau hauv 2008 yog lub ATI Radeon HD 4850. Qhov no graphics adapter Kev specifications suab tsis txawv los ntawm nws cov ncaj competitors, thiab tus nqi nws yog me npaum li cas. Raws li ib tug tshwm sim, Nvidia lub tuam txhab twb yuam kom reconsider nws pricing txoj cai thiab ua cov khoom ntau mus siv cuag. Raws li ib tug tshwm sim, buyers muaj lub sij hawm mus yuav ib tug haib graphics card rau ntawm ib tug ntau pheej yig tus nqi raws li ntawm ATI, thiab los ntawm NVIDIA.

khoom Tom qab

Tom qab tawm hauv lub graphics card series Radeon HD 3000 lub Canadian lub tuam txhab ATI yog yuav luag ib tug thiab ib tug ib nrab xyoo tsis xa tshiab cov khoom. Rau ib mas coj cov nyiaj txiag teebmeem nyob rau hauv 2007, thiab raws li ib tug tshwm sim, ho txo qhov kev thov rau kev kawm ntawv graphics daws teeb meem. Nyob rau hauv lub kawg, cov laus cov tswv raug yuam kom muag lub thib ob-loj tshaj plaws tsim tawm thiab chaw tsim tshuaj paus ntawm video chips, thiab tau ua raws li lub buyer, AMD. Nws yog nyob rau nthwv dej no thiab pib muag ATI Radeon HD 4850 thiab dua version ntawm cov tshuaj - nws yog ib lub HD4870. Nqi rau tom qab direct competitors ntawm lub "ntsuab" camp tau qis thiab theem ntawm kev ua tau zoo nyob rau hauv feem ntau daim ntaub ntawv - zoo tib yam.

On-nti video card twb tseem thov ATI Radeon HD 4850. logo tsav "Catalyst" series kuj Ameslikas muaj lub logo ntawm lub Canadian tsim kom muaj. Tab sis, ces, raws li cov software hloov tshiab, nws tau raug hloov los ntawm AMD. Raws li ib tug tshwm sim, nyob rau hauv lub neej yav tom ntej, cov khoom no twb ua lub npe hu raws li lub Radeon HD 4850 AMD tus.

niche kev daws teeb meem

ATI Radeon HD 4850 tau raug ua nyob rau hauv lub hauv paus ntawm ib qho ntawm cov feem ntau tsim semiconductor GPU 2008. Raws li, qhov kev specifications nws tau tso cai nyob rau ntawm lub sij hawm los daws kom tau yuav luag muaj teeb meem. Raws li ib tug tshwm sim, nws tau raug teem nyob rau kev siv ntawm cov muaj pes tsawg leeg ntawm qhov zoo tshaj plaws ua tau zoo gaming computers ntawm lub sij hawm, los yog graphics workstations. raws, nws kuj koom nyob rau hauv muaj pes tsawg leeg thiab workstations los yog multimedia PCs, tab sis nyob rau hauv cov ntaub ntawv no nws muaj peev xwm yog tsis siv tag nrho, thiab qhov no mus kom ze los ntawm ib qho nyiaj txiag taw tes ntawm view tsis tau nkaus justified. Rau xws li tshuab yog tsawg npaum khoom uas hais nyob ib sab nqi.

Options

Cheebtsam hauv cov khoom no yog raws li nram no:

• Lub card nws tus kheej ntsia cua txias system.

• Phau ntawv qhia, warranty card supplemented.

• CD-ROM distributions, tus neeg tsav tsheb thiab lwm yam tshwj xeeb software.

Ib txhia manufacturers mus ntxiv txhawb kev muag khoom ntawm cov khoom hloov li ib txwm cardboard lub thawv nyob rau hauv ib tug hlau nqa cov ntaub ntawv. Nws cov ntsiab lus rau nws hwm xwm. Greater nthuav rau ntawm no tsis tau txais, tab sis qhov tseeb tias nws yog tseem tsim nyog yuav tau nco ntsoov.

hom ntawm cov lag luam

Basic hom ntawm hauj lwm ntawm cov khoom - yog tus neeg card raws li ib feem ntawm ib lub PC. Tab sis cov tshuaj no kuj txhawb ATI proprietary technology hu ua "Crossfire." Nws essence lies nyob rau hauv lub fact tias ntau slots PCI Express 16X hom teem ntau graphics tsuj roj (feem ntau yog nyob rau hauv cov ntaub ntawv no 2 los yog 3). Lawv ntxiv kev cob cog rua rau txhua lwm yam los ntawm tshwj xeeb adapters. Raws li ib tug tshwm sim ntawm cov kev ua ntawm cov duab ntaub ntawv twb qhia ntawm ntau yam graphics accelerators, thiab nws yog ua tau kom tau ib tug tseem ceeb nce nyob rau hauv ceev.

Tsis graphics tsuj roj

Code npe ntawm ib tug silicon nti, cov tub ntxhais ntawm lub Radeon HD 4850 lub ATI, - RV770 index PRO. Nws twb ua rau 55 nm txheej txheem technology, uas nyob rau lub sij hawm yog qhov zoo tshaj plaws. Nyob rau hauv no semiconductor nti 956 lab transistor ntsiab tau ua ntawv thov. Lub tshav kub pob yog nyob rau hauv cov ntaub ntawv no yog sib npaug zos rau 110 watts. Number of processors li muab piv nrog rau yav tas los ob tiam ntawm phaib nce ntau tshaj 2 lub sij hawm los ntawm 320 rau 800 tej daim. Nws yog ib qhov kev daws teebmeem engineering pub rau ho kom cov kev ceev ntawm lub nti. Tsis tas li ntawd, cov architecture ntawm cov processors tau lawm redesigned.

Qhov thib ob point - ua pes tsawg tus kev ntxhib los mos units los ntawm 16 mus rau 40. Tab sis lub xov tooj ntawm ROP blocks (rasterization hauj lwm) yog tsis tau hloov thiab tseem nyob rau hauv 16. Nco bandwidth yog sib npaug zos nyob rau hauv cov ntaub ntawv no, 64 Gb / s. Tus adapter nws tus kheej twb tau qhov zoo mus ua hauj lwm nrog cov chaw tos tsheb loj PCI Express 2.0 hom. Koj muaj peev xwm siv nws nyob rau hauv ib hom ntawm 1.0, tab sis nws yuav txo tau cov kev ceev. Tab sis nyob rau hauv lub motherboard nrog them nyiaj yug rau 3.0 "bottleneck" nws yuav muaj ib tug graphics tsuj roj. Yog li ntawd, cov ua hauj lwm zoo li ib tug graphics tsuj roj yog pom nyob rau hauv no hwm nyob rau hauv nrog cov motherboard, uas ua hauj lwm nruj me ntsis nyob rau hauv PCI Express hom v. 2.0.

nco

Los ntawm kev siv cov RAM chips GDDR3 txheem twb raug kaw ATI Radeon HD 4850. 512MB - nws yog tus nqi ntawm cov RAM koj yuav feem ntau yuav pom nyob rau hauv nrog cov pob zeb ntais nti. Ho tsis tshua muaj heev thiab ntau tshaj versions ntawm qhov kev txiav txim, uas twb ua tiav nrog 1 GB ntawm RAM. Ntsis nco tsheb npav yog nyob rau hauv cov ntaub ntawv no li cas mus rau ib tug khoom, txawm los ntawm hnub no tus qauv 256 khoom.

Zoo tib yam tsis yog cov laus graphics phaib no kab - HD 4870. Tab sis hais tias yog cia li hom nco nyob rau hauv cov ntaub ntawv no twb tau GDDR5. Qhov no ua rau nws tau mus nrhiav tau ntau dua moos speeds thiab kev kawm ntawv theem ntawm lub cim xeeb. Kev sib piv, lub HD 4850 no tus nqi tsuas yog 2000 MHz, thaum lub sij hawm HD 4870 - 3600 MHz.

neeg tsav tsheb

Qhov nyuaj qhov teeb meem no thaum pib ntawm kev muag khoom yog ib tug neeg tsav tsheb. Thaj, Canadian programmers tsis muaj sij hawm los coj lawv mus rau kev zoo tag nrho, thiab raws li ib tug tshwm sim muaj ntau yam uas tsis nyob rau hauv xav cov khoom ua si khiav ntawm PCs nrog ATI Radeon HD 4850. Cov neeg tsav tsheb kuj tau ntxiv kom zoo zoo, thiab tag nrho cov uas tau txheeb xyuas flaws tshem tawm. Nyob rau hauv cov ntaub ntawv no, lub ATI logo nyob rau hauv lub software twb hloov los ntawm AMD. Tej kev hloov kho, rau cov neeg siv cov tswv yim, muab cov feem ntau ruaj khov lag luam los ntawm xws graphics adapters. Thiab nyob rau tag nrho cov loj versions ntawm lub operating system "windose" nyob rau hauv lub sij hawm - XP "Vista" thiab "7". Zoo, lub ntsis ntawm lub system software yog tseem nyob rau hauv cov ntaub ntawv no, tsis plays ib tug tseem ceeb luag hauj lwm, thiab muaj peev xwm yuav muab tso nyob rau hauv lub 32-ntsis OS modifications, los yog txawm rau 64-ntsis.

Qhov teeb meem no nrog cov acceleration

Overclocking tej zaum nyob rau hauv no semiconductor nti yog heev zoo. Tab sis ua xws lag luam yog tsim nyog los equip lub PC haib fais fab mov (tsis tsawg tshaj li 750 W). Tsis tas li ntawd, lub graphics tsuj roj yuav tsum tau nruab nrog tus siab heev cua txias system. Yog li ntawd phaib nrog ib tug passive tshav kub dab ntxuav tes thiab puag txias system yog tsis pom zoo kom overclock. Thiab tsuas cov khoom uas muaj proprietary txheej txivhmab yuav raug txoj kev ua no. Raws li ib tug tshwm sim, siv ATI overdrive nqi hluav taws xob yuav tsum tau tsis txhob ib tug ua ke ntawm 625 MHz (rau ib tug graphics nti) thiab 2000 MHz (rau RAM) coupling 685 MHz thiab 2150 MHz, ntsig txog. Qhov no ntxiv 8-9 feem pua ceev. Ntxiv txhim kho xws li ib tsuj roj yog tsis yooj yim sua. Yeej tseem zoo, yog tias kov yeej cov kev txwv ntawm 700 MHz, qhov no tsuj roj tau ua ib tug ncaj qha competitor rau cov laus qauv HD 4870. Ntawm tus taw tes ntawm view ntawm marketing xws li ib tug teeb meem no yog tsuas tsis tsim nyog.

Sib tw cov khoom nyob rau hauv qhov tawm point

ATI Radeon HD 4850 graphics card rau ntawm lub sij hawm uas nws tso tawm, raws li sau tseg ua ntej lawm, yog ib tug ncaj qha competitor ntawm ob yam khoom los ntawm NVIDIA. Qhov no GeForce 8800GTS thiab GeForce 9800GTX. Nyob rau hauv thawj cov ntaub ntawv, lub parity ntawm cov khoom tau ob qho tib si nyob rau hauv nqe thiab kev kawm ntawv. Thiab rau ceev nws muab tau ntau heev tshaj dua dua ib yam khoom los ntawm ATI. Tab sis nws yog nyob rau hauv tej hom. Nyob rau hauv cov ntaub ntawv ntawm acceleration tshuaj NVIDIA offset backlog thiab tej zaum kuj txawm tawg tawm nyob rau hauv pem hauv ntej. Tab sis GeForce 9800GTX xav nws kev specifications ntau tsim graphics accelerators, thiab raws li ib tug tshwm sim, raug nqi ntau dua. Qhov txawv nyob rau hauv ceev yog 7-10 feem pua, uas txawm overclocking tsis pub nyiaj.

Qhov teeb meem no nyob rau hauv hluavtaws kev ntsuam xyuas

Nyob rau hauv tej hom HD 4850 nyob rau hauv hluavtaws PC KOS CIM 2006 xeem muab 12.200 cov ntsiab lus. Yog hais tias nws yog overclocked rau frequencies thiab 685MGts 2150MGts feem, nws yog ua tau kom tau ib tug ntxiv ib txhiab cov ntsiab lus. Raws li ib tug tshwm sim ntawm nws txoj kev ua tau zoo nyob rau hauv cov ntaub ntawv no nws yuav tsum tau soj ntsuam raws li thaum ntxov raws li 13.200 cov ntsiab lus. Nyob rau hauv lem, GeForce 880GTS nyob rau hauv cov ntaub ntawv no, txawm qhov yooj yim version twb muab 13.500 cov ntsiab lus. Zoo, txawm tias qhov no overclocked rau 820MGts / 1890MGts, nws twb tau txais 15,000 ntsiab lus. Raws li ib tug tshwm sim, cov khoom cua xeem cov tshuaj los ntawm lub "ntsuab" Chaw tsim tshuaj paus nkawd preferable. Tab sis lub sij kev kawm ntawv ntawm cov virtual ntsiab lus feem ntau tsis muaj kev sib raug zoo. Cov qhov tseem ceeb tsuas qhia ib tug high degree ntawm optimization software. Nyob rau hauv cov ntaub ntawv no, tus neeg tsav tsheb nyob rau hauv lub graphics card ATI Radeon HD 4850 yog tsuas yog tsis "xauv li" rau qhov kev xeem no.

Cov Tsam Thawj nyob rau hauv kev ua si ntawm lub sij hawm uas

Radically txawv qhov teeb meem no nrog gaming daim ntaub ntawv nyob rau hauv cov nqe lus ntawm kev ua tau zoo nyob rau hauv ib yam khoom kab ATI Radeon HD 4850 Series. Cov neeg tsav tsheb nyob rau hauv cov ntaub ntawv no twb tsis ua si xws li ib qho tseem ceeb luag hauj lwm.

Peb pib nrog cov yeeb ncuab Territory Quake ua tsov ua rog. Nyob rau hauv qhov kev ua si, qhov kev kawm ntawm peb cov kev saib xyuas ntawm tus hero overtakes txawm 9800GTX. Lub HD 4850 yog lub xov tooj ntawm cov zis dluab ib thib ob yog sib npaug zos rau 86. Nyob rau hauv lem, 9800GTX, cov nqi no yog 81, thaum lub sij hawm 8800GTS - tag nrho cov 71 cov nuj nqis no siv tau rau ib hom ntawm 1680 x 1050. Nrog ib qho kev nce nyob rau hauv kev daws teeb meem mus txog rau 1920 × 1200 qauv tseem, thiab ntsuas yuav muaj feem 72, 66 thiab 58.

Qhov teeb meem no yog zoo ib yam li "Ib nrab neej 2". Rau thawj lub hom nqi yuav sib npaug zos rau 111, 103 thiab 89, thiab rau lub thib ob - 88, 82 thiab 71. nyuag hloov qhov teeb meem no nyob rau hauv Perseus txib. Ces tus thawj coj yog ua 9800GTX tov nrog indicators, As 184 (rau 1680 x 1050) thiab 149 (rau 1920 x 1200). Indicators HD 4850 yog 162 thiab 127 feem. Zoo, yuav luag sib npaug 8800GTS - 157 thiab 129.

Xyaum tib yam thiab hu cov tub 4. Nyob rau hauv cov ntaub ntawv no qhov tseem ceeb sib npaug 9800GTX 82 thiab 72 rau HD 4850 - 79 thiab 67, thiab rau 8800GTS - 72 thiab 62 Qhov txawv ntawm tus thawj thiab thib ob qhov chaw nyob rau hauv cov ntaub ntawv no, tsis tseem ceeb txaus nyob rau hauv cov nqe lus ntawm kev ua tau zoo , tab sis tus nqi lawv txawv ho.

Nyob rau hauv Unreal kev sib tw 3 dua qhov teeb meem no hloov dramatically. Thawj Coj dua ua HD 4850 nrog indicators, As 121 (rau 1680 x 1050) thiab 97 (rau 1920 x 1200). Nyob rau hauv ob qhov chaw - 9800GTX c indicators 117 thiab 92. Qhov kawg - 8800GTS nrog 102 thiab 80 feem.

Ib tug zoo xws li cov qauv txuas ntxiv nyob rau hauv feem ntau gaming daim ntaub ntawv. Feem ntau cov feem ntau outpaced HD 4850, albeit tsuas yog me ntsis, nws ncaj qha competitor nyob rau hauv lub ntsej muag ntawm 9800GTX. Ntxiv mus, qhov no qhov teeb meem no tuas rau 70 feem pua software. Tab sis nyob rau hauv seem 30% nws yog ib tug twb tau thawj coj 9800GTX. Tab sis nws yuav tsum tau muab sau tseg tias qhov txawv yog tsis yog li ntawd tseem ceeb heev. Thaum zoo li no nti yog ua los ntawm 9800GTX obsolete thaum lub sij hawm kev txheej txheem (65 nm) thiab muaj ib tug ntau dua tshav kub kub (156 watts). Nws hloov tawm hais tias qhov ntau preferable purchasing nyob rau ntawm lub sij hawm yog cia li HD 4850.

Tshwj xeeb tsim cov ntawm no card

Lub engineers nyob rau ntawm lub sij hawm tseem muaj ib tug Canadian chaw tsim tshuaj paus ntawm lub tiav tau txiav txim siab tsis mus nres. Lawv tso ib tug ntau tshaj kev hloov kho ntawm tus tsuj roj - ATI Radeon HD 4850 X 2. Prefix X 2 taw tes rau lub fact tias qhov no yog ib tug dual-GPU graphics card. Raws li, nws yog txawm peem rau nrog ib tug paub txias system, thiab nws cov kev specifications, txawm tam sim no muaj peev xwm daws tau feem ntau cov teeb meem. Tsis tas li ntawd nyob rau hauv tej khoom yog yuav tsum tau tam sim no 1 GB ntawm RAM. Nqi ntawm xws li ib tsuj roj yog ntau npaum li cas kim heev. Lub tsuas tsis zoo hais tias nws yog thawj lub sij hawm tom qab pib ntawm kev muag khoom, - phem software optimization. Tsis yog txhua txhua cov khoom ua si "zoo li" nws pib. Tab sis ib tug ntxiv kev hloov tshiab ntawm software engineers los ntawm AMD twb txiav txim siab no qhov teeb meem.

nqi ntawm

Heev, zoo muab ATI Radeon HD 4850. Specifications nws yog tiag tiag impressive, thiab cov kev xeem tau qhia ib cov kev kub ceev. Raws li ib tug tshwm sim, xws li ib tug khoom yuav ua tsis tau pheej yig thiab pheej yig. Tab sis txawm nyob rau hauv ib tug heev yooj yim nyiaj txiag teeb meem, ATI tau muaj kev tswj kom qhov nqi koj tshuav ntawm tus nqi thiab kev kawm ntawv thiab muaj tus tsuj roj rau cov kev ywj pheej tus nqi ntawm $ 199. Tab sis qhov no yooj yim kev hloov kho li ces thiaj li menyuam. Tom qab ntawd muaj ntau tshaj versions, tus nqi ntawm uas yuav mus txog txawm 320 dollars. Tab sis nyob rau hauv cov ntaub ntawv no, tus neeg siv tau txais ib tug paub daws nrog zoo thaum tshav kub kub lub dab ntxuav tes thiab siab frequencies. Tsis tas li ntawd, thaum no yog ib tug ploj, albeit me ntsis, overclocking graphics tsuj roj.

Xyuas

Tus yuam sij drawback ntawm tag nrho cov kab kev daws teeb meem ATI Radeon HD 4850 Series yog tsis muaj zog software. Heev feem ntau, cov khoom tsav tsheb coj mus rau lub fact tias ib txhia video ua si yog tsis nquag ua rau ib tug zoo xws li cov kho vajtse. Cov no yog "outliers" los ntawm qhov kev ua si, thiab "khov", thiab lub rov tshwm sim ntawm "dub" screen, tab sis lub computer ua hauj lwm zoo. Nws taw tes tawm nyob rau hauv kev xyuas ntawm tus tswv ntawm xws li ib tsuj roj. Tab sis, ces, raws li peb hloov cov software, tag nrho cov teeb meem twb daws, thiab nyob rau hauv lub neej yav tom ntej tsis muaj teeb meem sawv nrog lub Radeon HD 4850 lub ATI.

Lub qhov rais 7 tsav tsheb yog tsim nyob rau hauv ib txoj kev zoo. Tsis ntev nws twb hais "nyoos" los ua ke nrog rau tej kev tsis zoo, uas yog ces twb coj AMD engineers rau zoo tag nrho. Lub ntsiab kom zoo dua ntawm cov khoom no yog tus piv ntawm "nqi / kev kawm ntawv". Nyob rau tus nqi ntawm 199 dollars, cov khoom no yuav lwv nyob rau yuav luag sib npaug nrog kim GeForce 8800GTS los sis txawm ib GeForce 9800GTX.

tau

Tej revolutionary kev hloov nyob rau hauv lub me me ntawm graphics accelerators yog tsis tau qhia lub Radeon HD 4850 lub ATI thiab nws tus tij laug nyob rau hauv lub ntsej muag ntawm HD 4870. Qhov no yog ib qho evolutionary kev hloov ntawm yav dhau los tiam ntawm cov khoom, albeit nrog loj ua kev ciaj ciam ntawm qhov kev txiav txim. Tab sis lub rov tshwm sim ntawm cov kev daws nyob rau hauv lub hwm ya, "tuav» ATI tuam txhab direct competitor - NVIDIA. Raws li ib tug tshwm sim, lub xeem kho nws pricing txoj cai thiab txo tus nqi rau cov graphics accelerators nyob rau hauv no ya. Qhov no yuav pab tau tsuas yog tus kawg neeg uas muaj ib lub sij hawm kom tau ib tug ntau npaum daws nyob rau ib tug txo nqi. Thiab koj muaj peev xwm txawm xaiv tau ib tug graphics card, los yog los ntawm lub "liab" camp (ie, ATI / AMD), los yog "ntsuab» (NVIDIA).