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Autor McG
Lako još za to da nisu u rangu s Core i5-2500K i Core-i7 2600K, ali FX modeli se teško nose s Phenom II X6 "braćom". Tu je pravo razočaranje. Korak naprijed, dva natrag.
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Na papiru Buldožer izgleda moćno ali u stvarnosti to nije. Previše je toga šta je dijeljeno unutar modula, velika latencija L2 i L3 keša... Na xbitlabu ima fino pojašnjenje:
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"And the dual-core Bulldozer module has too many units shared between the cores. In particular, since a module like that has only one instruction prefetch unit and one decoder, the entire dual-core block can still process only four instructions per clock. And it means that in terms of theoretical performance it is a Bulldozer module, but not the actual core that would be considered a logical equivalent to a single core in Sandy Bridge processors. in this case the module’s ability to perform two threads looks like a pretty logical response from AMD to Intel’s Hyper-Threading technology. Of course, our performance tests of the new processors will dot all i’s, but even at this point we can’t help thinking that Bulldozer’s positioning as an eight-core processor is more of a marketing move. In reality it is the number of modules that gives us a better idea of these processors’ computational potential."
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Samim time ne radi se tu nikako o pravom 8 jezgrenom procu nego: 4 module 8 threads procesoru. Zato i je jedan Thuban 1055T sa pravih 6 jezgri brži od 6 jezgrenog Buložera, koji je na višem taktu, ali ima samo 3 modula a to su 3 para šeranih jezgri. Sam Amd je na slajdovima prije predstavljanja govorio da dobit ovakovog dizajna je 80%, a ne 100% jer se resursi dijele. Naravno ništa nije gotovo. Na roadmapu je u Q1 2012 FX-8170, ali stvarno milsilm da bi trebali nešto promijeniti a ne tjerati "mak na konac" i pumpat samo takt na aritekturi koja nije baš nešto revolucionarno kako se očekivalo.