how does that multiplier thingy work with tbirds?

[anarki_gr]

for example, a 1.2 200MHz tbird would have a 6x multiplier (6 x 200)? am i right? i got a little bit confused with an article on a site so i want to be sure.

[Rob Cork]

I think the multiplier would still be 12x. It's the multiple of the fsb that's used, and the fsb is still technically 100MHz on a '200' chip. The cpu bus may be dual pumped, giving effectively 200MHz, but the cpu is said to run at 12x100, not 6x200 if you see what I mean. At least it's always a 12x multiplier in bioses and manuals - quite how it actually works I don't know, it may be more accurate to say 6x, but stick to the conventional 12x and 13x range and you'll be fine.

[Paul -The Mad Hatter]

The multiplyier is 12x. The reason why amd says 200fsb is because when you are using ddr memory it theorecticly has twice the banwhich, which is equivelent to 200mhz sdr.

[bodezafa]

pauldogg (Jul 11, 2001 07:40 p.m.):
The multiplyier is 12x. The reason why amd says 200fsb is because when you are using ddr memory it theorecticly has twice the banwhich, which is equivelent to 200mhz sdr.
I thought it was because it sent data on both the up and down stroke of the clock cycle.Or am i talking out my arse??

[oc jason]

the 200/266 bus speed is for DDR ram - so with SDRAM the 200 is really a 100 so a 1200 mhz chip is at 12x100=1200. but a much better setup would be to go 9x133=1200 but much better performance- just unlock the chip and lower the multiplier to 9 and up the FSB to 133 or as high as you can go

[anarki_gr]

thanks. i got it now