29-08-2013 17:42
CPU Xbox ONE podría ir a 1.88 Ghz
http://semiaccurate.com/2013/08/29/a-dee...hitecture/
A deep dive into MicrosoftÔÇÖs XBox OneÔÇÖs architecture
"Main Memory Speeds, Feeds, and Coherency:
The CPUs connect to four 64b wide 2GB DDR3-2133 channels for a grand total of 68GB/sec bandwidth. Do note that this number exactly matches the width of a single on-die memory block. One interesting thing to note is that the speed of the CPU MMUÔÇÖs coherent link to the DRAM controller is only 30GBps, something that strongly suggests that Microsoft sticks with JaguarÔÇÖs half-clock speed NB. If the NB to DRAM controller is 256b/32B wide, that would mean it runs at about 938MHz, 1.88GHz if it is 128b/16B wide.
SemiAccurate would be very surprised if it was 128b wide, wires are cheap, power saving areas not. Why is this important? Unless MicrosoftÔÇÖs XBox One architects are masochists that enjoy doing needless and annoying work they would not have reinvented the wheel and put an arbitrarily clockable asynchronous interface between the NB and the CPU cores/L2s. Added complexity, lowered performance, and die penalty for absolutely no useful upside is not a good architectural decision. That means the XBox OneÔÇÖs 8 Jaguar cores are clocked at ~1.9GHz, something that wasnÔÇÖt announced at Hot Chips. Now you know."
Interesante si al final es cierto 
El artículo en si, es una primera parte del análisis de la presentación del otro día en Hotchips, en la que por cierto, no se reveló la frecuencia de los jaguar
saludos
http://semiaccurate.com/2013/08/29/a-dee...hitecture/
A deep dive into MicrosoftÔÇÖs XBox OneÔÇÖs architecture
"Main Memory Speeds, Feeds, and Coherency:
The CPUs connect to four 64b wide 2GB DDR3-2133 channels for a grand total of 68GB/sec bandwidth. Do note that this number exactly matches the width of a single on-die memory block. One interesting thing to note is that the speed of the CPU MMUÔÇÖs coherent link to the DRAM controller is only 30GBps, something that strongly suggests that Microsoft sticks with JaguarÔÇÖs half-clock speed NB. If the NB to DRAM controller is 256b/32B wide, that would mean it runs at about 938MHz, 1.88GHz if it is 128b/16B wide.
SemiAccurate would be very surprised if it was 128b wide, wires are cheap, power saving areas not. Why is this important? Unless MicrosoftÔÇÖs XBox One architects are masochists that enjoy doing needless and annoying work they would not have reinvented the wheel and put an arbitrarily clockable asynchronous interface between the NB and the CPU cores/L2s. Added complexity, lowered performance, and die penalty for absolutely no useful upside is not a good architectural decision. That means the XBox OneÔÇÖs 8 Jaguar cores are clocked at ~1.9GHz, something that wasnÔÇÖt announced at Hot Chips. Now you know."
Interesante si al final es cierto 
El artículo en si, es una primera parte del análisis de la presentación del otro día en Hotchips, en la que por cierto, no se reveló la frecuencia de los jaguar
saludos