200, 133, 750 ....How does this all Tie together?

[Wooozy]

i have a 750 duron with 200mhz front side bus that works on a 100 FSB on the motherboard. The confusion is on what Exactly the 200mhz does and where is it? the CPU bus?
:burn:

[Shadow ÒÓ]

welcome to the forums...you may try the AMD Processors section for better responses.

I'll move this post there.

[Jon]

Welcome to the forums...hope to see you stick around and learn all we have to share with you!

Well, the actual bus speed of the motherboard is 100MHz. With AMD processors it's a little different as they work on the rise and fall of each clock cycle which kind of results in a "double-pumped" bus for a theoretical 200MHz.

[Wooozy]

"Well, the actual bus speed of the motherboard is 100MHz. With AMD processors it's a little different as they work on the rise and fall of each clock cycle which kind of results in a "double-pumped" bus for a theoretical 200MHz."

Yeah, that's a general description. BUT, The you've got a system bus of 100mhz feeding a 200Mhz bus that is Physically where..i don't know. If the 100mhz bus is feeding the proc wich is reading and writing from the bus at 200mhz...isn't it waiting half of the time since it's twice as fast?

[Hugo 59]

The fsb between the ram and the cpu runs at Double Data Rate. This means that the bus from the cpu to the ram is effectively running at double your fsb, thus making what AMD calls a 200 fsb. The rest of the mobo runs at 100 fsb.

This makes your computer faster because it double's the speed of which your cpu can get info from memory but it is not a true 200 fsb.

[Kendle666]

Okay Wooozy it works like this: yer MoBo FSB is @ 100 mhz .............that means, it is running at 100,000 cycles a second.
so in a "normal" data rate it would mean that yer memory,cpu, and bus line would get a maxium of 100,000 instutions a second each being recieved on the upswing of the cycle............With the Doulbe Data Rate (DDR) that AMD(athlon, Duron) use, they are able to use the upswing and downswing of the cycle............with that and the use of L1 and L2 cashe on the CPU the AMD's are able to do 2 instrutions per clock cycle ................that's how they claim it's a 200(100) FSB or 266(133)FSB.......................I know this is kind of a ramble, but I hope it will make things a little clearer