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Athlon 64 / Athlon 64 FX - 64 bita u biti nije bit(no)
31.10.2003.
    « Prev  : Stranica 3 od 16 :  Next »      By ::  Ozren Žagmešter 
- Athlon 64 2/3 -

Mnogi će u Athlon 64 FX-u prepoznati Opterona - socket je isti (Socket940), oba imaju wide memorijski kontroler, itd. Sličnost je velika, tu dvojbi nema. Ipak, ova dva procesora nisu identična jer osim male razlike u memorijskom kontroleru (FX podržava DDR400), Athlon 64 FX bi trebao imati samo jedan HyperTransport link, dok ih je kod Opterona 3. Kažemo "trebao imati" jer po svemu sudeći i Athlon FX ima tri linka (iako AMD tvrdi suprotno). Jedini način da se to provjeri bilo bi uparivanje dva FX-a na dvo-procerskoj ploči, nešto što nismo mogli izvesti (drugi FX bilo je nemoguće nabaviti). Neovisno o tome, manje HyperTransport linkova ne znači niže performanse jer Opteron ima 3 HyperTransport linka zbog toga što je prvenstveno namijenjen više-procesorskim sistemima.

I CPU-Z u Athlonu 64 FX vidi Opterona

Dok je takt za Athlon 64 FX-51 2,2GHz-a, Athlon 64 3200+ "vrti" se na 2GHz-a

Postojanje dva različita socketa nije sretno rješenje no jedina alternativa zbog širine memorijskog kontrolera bila bi ta da su svi procesori Socket 940 - jedino što bi dodatni pinovi na Athlonu 64 ne-FX "spavali". Sigurno je da bi takav pristup osjetno dignuo cijenu izrade Athlon 64 procesora, a i matičnih ploča. Kako je Athlon 64 zamišljen kao mainstream procesor koji će se suprodstaviti Prescottu, povećanje cijene nebi bio dobar potez pogotovo što Athlon 64 uopće nije jeftin - model 3200+ košta USD417. Ovakva cijena ne čudi jer ne treba zaboraviti da se radi o procesoru koji je kudikamo kompleksniji nego predhodnik AtlonXP (veći cache, integrirani memorijski kontroler, itd.). Visoka cijena svih Athlon 64 procesora ne čudi i zbo toga što je die vrlo velikih 193mm2. Uz to je Athlon 64 FX je zamišljen kao procesor na kojem nema kompromisa i koji će biti superioran Prescottu. Tako trenutno najači model, Athlon 64 FX-51 košta impresivnih USD733. Na to dodajte veću cijenu matične ploče, pa cijenu registered memorije - ubrzo vam postane jasno da se radi o procesoru koji nije za svakoga. Athlon 64 FX cilja na entuzijaste koji su voljni platiti bilo koju cijenu za što brži sistem. Iz tog razloga Athlonu 64 FX nepredviđamo neki veći komercijalni uspjeh na našem tržištu. Ono što je po nama najveći problem s FX-om jest činjenica da radi samo s registered memorijom koja je skuplja i trenutno teško nabavljiva. Situacija će se popraviti jer su već Kingston i Corsair najavili registered module no trebat će vremena dok se dotični ne pojave na tržištu. Uz to, za očekivati je da će, bar za prvo vrijeme, ti moduli imati manje agresivne postavke nego trenutno dostupni unbuffered DDR400 moduli. Treba napomenuti i to da ECC i registered memorija nisu jedno te isto - memorija može biti ECC a da nije registered i obratno.

Registered DDR400



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