memory speed help

[nymph4]

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???

[hot dog]

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???

Not necessarily... The Front Side Bus is the path between the North Bridge and your CPU.  Your RAM is connected directly to the North Bridge.  Your Front Side Bus's Max. speed determines the speed between your memory and cpu...




 

[nymph4]

 So the CPU is connected to the Chipset and the North Brige of the Chipset is connected to the RAM.

Is this your FRONTSIDE BUSS ??

[hot dog]

Both the North Bridge and the South Bridge make up the chipset...  The path from the CPU to the North bridge is the Front Side Bus..

The ram is connected directly to the North Bridge..... see here for better view:

http://www.pantherproducts.co.uk/Articles/images/kt600_blkdiagram.gif


To answer your other question, a lot of processors today are "quad pumped" boosting the FSB speed from root speed 4x.  Is if you had a FSB of 200 MHz, your FSB throughput would be 800 MT/s (mega transfers/s).  If your using DDR2 800 with that, THEN the speed from your ram to cpu would be 800.  But technically it wouldn't be 800 MHz, it would be 800 MT/s..

Generally, your system will only run as fast as the FSB will allow it..