System bus question ?

S

Sabotage

Geek Trainee
Firstly is the system bus also known as the FSB ?
I attended an IT roadshow recently and i was informed that the speed on some of the ASUS mobo's they had there were misleading - they were saying that the FSB runs at 266MHz when in fact it only runs at 133MHz because thats all its capable of at the moment. Only when DDR is plugged in then it effectively runs at 266. How true is this.

tx 4 the time..
 
Yes, the systems bus speed is the same as FSB.

For the MHZ question, it's true that they are only running at 100/133mhz, but when you insert DDR RAM it uses both the top and bottom on the clockcycles in comparison with sdram which only uses the top cycle effectively doubling the speed of your RAM.

Hope this helps.
 
Hmm

Hold on, you said the System bus speed is the same. Does that mean that the System bus is a separate bus from the FSB or the exact same thing, just different name.
 
Sorry for not making it more clear but FSB is the same thing as the system bus, just a different name for it.
 
Well, it's not purposely misleading. See, the AMD chips out run on a DDR bus. The DDR bus is what is confusing really. The thing is it's a 133MHz FSB DDR, and equivelent to 266MHz FSB SDR (Single Data Rate).
 
You must log in or register to reply here.
Back
Top