Why is FSB half in the BIOS?

A

Arti

Weaksauce
Joined
Aug 6, 2004
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93
Is there an actual reason for it? Maybe so that the FSB looks faster when the product is being marketed?
 
you can change the FSB. and half meaning its at 133? or what
 
he's asking why in BIOS does it say 166MHZ when it reads as 333MHZ outside bios.

That has something to do with Double Data Rate. DDR. Though specifically I don't know.
 
whoa, that is an OLD article... just think of it (in the simplest terms possible) that Intel machines are quad pumped and AMD machines are dual pumped. It's similar in idea to DDR vs. SDR RAM. (it even looks like it from what i scanned in that article). You multiply the FSB on AMD's by 2x and 4x for an intel. :D
Weird.
 
The FSB is actually, in your case, 166 or 166 clock cycles. 1 piece of data passes through each cycle. AMD found a way to pass 2 bits of data per cycle ( called double pumping)so they have an effective FSB of double your 166 for a total of 333. Intel found a way to pass 4 pieces of data per cycle (called quad pumping) so they have an effective FSB of 4x your 166 for a total of 666.

So with an AMD processor you have a REAL FSB of 166 but an effective FSB of 333. Its the same deal with DDR ram.
 
diredesire said:
whoa, that is an OLD article... just think of it (in the simplest terms possible) that Intel machines are quad pumped and AMD machines are dual pumped. It's similar in idea to DDR vs. SDR RAM. (it even looks like it from what i scanned in that article). You multiply the FSB on AMD's by 2x and 4x for an intel. :D
Weird.
Click to expand...


Its a pretty good aritcle that really explains how it works. I had to post it in another thread, so i though it would work here too. You pretty much explained it though.
 
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