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Athlon 64 4800+ X2 - dvoglavi zmaj u akciji
22.06.2005.
    « Prev  : Stranica 1 od 9 :  Next »      By ::  Uredništvo 
- Uvod -

Razvoja AMD-ovih procesora u zadnje vrjieme ide jako dobro. Revolucinarana arhitektura K8 na kojoj su bazirani svi Athloni 64 te serverski Opteroni, od svojeg je predstavljanja doživjela niz uspješnih "face-liftinga". Zadnju tehnološku nadogradnju obradili smo u članku o jezgri Venice. Riječ je o novoj jezgri koja se proizvodi 90-nanometarskim procesom u kombinaciji sa tehnologijom SSDOI (Strained Silicon Directly On Insulator) i koja ima unaprijeđeni memorijski kontroler te podršku za instrukcije SSE3. Moramo napomenuti da kad spominjemo novu jezgru ne mislimo isključivo na jezgru Venice. Naime AMD je izdao više novih jezgri koje se razlikuju samo prema količini L2 cachea i namjeni (da li su na njima bazirani monojezgreni ili dvojezgreni procesori) te zbog toga nose različita kodna imena.

Shematski prikaz AMD-ovih dvojezgrenih procesora

Čitatelji koji prate razvoj procesora se sigurno sjećaju AMD-ove replike na Intelovo predstavljanje tehnologije HyperThreading. Tada je iz AMD-ovog tabora stigla izjava da tvrtka u svojim proizvodima ne planira rabiti virtualni SMP već da ubrzano radi na dvojezgrenim procesorima, dakle pravom hardverskom SMP-u. Premda je ovakva izjava tada zvučala pomalo nadobudno, na kraju je ispalo da AMD-ovci znaju što pričaju. Naime, svi procesori bazirani na arhitekturi K8 imaju ugrađen logiku koja jezgru povezuje sa integriranim memorijskim kontrolerom i ostatkom sistema putem HyperTransport sabirnice. Štos je u tome što je na istu logiku moguće "zakačiti" još jednu jezgru (možda čak i više jezgri).

Model
Takt
L2 cache
Preporučena cijena
Athlon 64 4800+ X2
2.400 MHz

1 MB

USD1.001

Athlon 64 4600+ X2
2.400 MHz
512 kB
USD803
Athlon 64 4400+ X2
2.200 MHz
1 MB
USD581
Athlon 64 4200+ X2
2.200 MHz
512 kB
USD537

Za cijenu u HR slobodno dodajte 40%

Jedini problem dosad je bio proizvodni proces. Dvojezgreni 130-nanometarski procesor bio bi neisplativ, a vjerojatno postoje i tehničke zapreke pri integriranju toliko velikih jezgri u isto pakiranje. Prve 90-nanometarske jezgre također nisu bile pogodne za dvojezgrene procesore budući da je AMD tek uhodavao 90-nanometarske proizvodne pogone. Kao što znamo, Winchesteri, prvi 90-nanometarski Athloni 64, se nisu pojavili na brzinama većim od 2,2 GHz odnosno nisu postojali modeli jači od 3500+.



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