AMD Athlon 64 TF-20 - Does anyone know anything about this line? I know the TL but not the TF. It's the processor in a dirt cheap laptop that someone is considering. I can't find anything on them.
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7/13/09 at 2:37pm
|The front side bus as it is traditionally known may be disappearing, but it's still being used in all of Intel's Atom, Celeron, Pentium, and Core 2 processor models. Originally, this bus was a central connecting point for all system devices and the CPU. In recent years, this has been breaking down with the increasing use of individual point-to-point connections like AMD's HyperTransport and Intel's QuickPath Interconnect. The front side bus has been criticized by AMD as being an old and slow technology that bottlenecks today's computer systems. While a faster CPU can execute individual instructions faster, this is wasted if it cannot fetch instructions and data as fast as it can execute them; when this happens, the CPU must wait for one or more clock cycles until the memory returns its value. Furthermore, a fast CPU can be delayed when it must access other devices attached to the FSB. Thus, a slow FSB can become a bottleneck that slows down a fast CPU. FSB's fastest transfer speed is currently 1.6 GT/s, 3 to 4 times slower than current QuickPath Interconnect speeds and 2 times faster to 2 times slower than HyperTransport speeds.