memory speed help

[robertbiferi]

I need some help understanding something?

I have DDR 2 DIMM 800 MHz

Now this means that the information is going from the CPU to the memory and from the memory to the CPU at 800 MHz right???

And just to keep it simple for me say your Front/Side BUSS is 500 MHz then what is the front/side buss???

 

[Bodaggit23]

The front side bus carries data between the cpu and northbridge.

 

[StrangleHold]

I need some help understanding something?

I have DDR 2 DIMM 800 MHz

Now this means that the information is going from the CPU to the memory and from the memory to the CPU at 800 MHz right???

No, DDR2 800 runs at external speed of 400mhz. And since your talking about a FSB, that probably means the memory controller is on the N/B. So the CPU communicates to the memory through the northbridge. So it will be at the N/B - FSB speed.

And just to keep it simple for me say your Front/Side BUSS is 500 MHz then what is the front/side buss???

Dont really know what that means. If you mean, what is a FSB. Its the bus between the CPU and Northbridge.

 

[Bodaggit23]

Also, since the memory is Dual Data Rate, it effectively runs at 800mhz.

Correct?

 

[StrangleHold]

Effective is the word. Nothing is really going faster then 400mhz. It can just send data on the rising and falling of the clock cycle.