FSB on athlon 64?

[Dough1397]

i never seen anyoen mention the fsb speed of athlon 64?

anyone care to tell me?

 

[slag]

two hundred

 

[Hajime]

Depends on what you mean by "fsb".

1.6ghz has been bandied about before, but that could just be marketing-speak.

 

[Dough1397]

front side bus? only 200... wow thats weak...

 

[charloscarlies]

Originally posted by: Dough1397
front side bus? only 200... wow thats weak...

No...

It technically doesn't even have a "fsb" because the memory controller is on die. The HTT speed is 200 x LDT multiplier which is usually 4 or 5.

 

[Budman]

Originally posted by: Dough1397
front side bus? only 200... wow thats weak...

same as the P4,or did think it was actualy 800mhz.

 

[TheStu]

Originally posted by: Budman

Originally posted by: Dough1397
front side bus? only 200... wow thats weak...

same as the P4,or did think it was actualy 800mhz.

Yeah the P4 simply multiples the 200 MHz FSB by 4 and you get the Hyperthreading... the A64 has theon-die mem controller whcih to the best of my understanding boosts the 'FSB' by 4 or 5 like charlos said... that allows it to have a 'FSB' of between 1.6 and 2.0 GHz.... however in actuality it is 800-1000 MHz in Full Duplex so it is 800-1000 in both directions. Anyone may feel free to correct me if I am wrong...

 

[Concillian]

P4:
memory -->up to 6.4 GB/sec--> memory controller/northbridge -->up to 6.4GB/sec--> CPU

A64:
memory --> up to 6.4GB/sec --> memory controller on CPU
then seperately
bridge chip --> up to 6.4GB/sec --> CPU

So in essence the A64 allows for nearly double the bandwidth of data moving to the CPU. 6.4 GB/sec from the memory and a second 6.4GB/sec from the Hypertransport bus that connects the chipset. On the P4 the same bus must share data path to the CPU with memory / IDE controllers PCI bus, AGP bus, etc...