Man. help with knowledge

[Degenerate]

I just realised that i am not undertanding bits and peices of stuff about Overclocking like RAm speed, FSB, AGP, and blabh ablah when they all come together. I dont know why i am not understanding such things. but would anyone point to a direction where i can read about these things from square 1. Preferable OC on a P4 with both DDR and RDRAM.

some questions :
http://www.tomshardware.com/mainboa...s-02.html#the_future_of_ddr_ddr400_and_ddr533
What is that picture representing? same FSB with diff clocked RAM?

http://www.tomshardware.com/mainboard/02q2/020501/ddr400vsrambus-03.html
The two pictures on the bottom. What ram are they using. They got :
internal clock 2400, wich i can see is the CPU's clock speed
system bus, and system clock. i can se that they are related to FSB, but obiously ram has come into the equation. But how?

Also i hear people adjusting the "ratio" for their FSB and AGP. how does this work


Sorry to sound all newbie and what ever. but i woke up this morning and felt like one. perhaps i am just one in this field

 

[Degenerate]

yes.... I am dumb!. Please?

 

[foofoo]

hi,


<< some questions : >>




<< What is that picture representing? same FSB with diff clocked RAM? >>


yes, that's it exactly.
depending on the board and bios, one can clock the fsb and memory asynchronously.
this means that the ram and the fsb are not coupled rigidly 1:1 like they used to be in the past.
fsb * multiplier = cpu clock speed
fsb * ratio = pci (and agp / 2) clock speed
and you can set the memory bus independantly.

the ratio is adjustable so that if you want to overclock the processor and not overclock the pci / agp bus too much you can change the ratio.
e.g.
fsb (133) * ratio (1/4) = 33 (pci clock speed)
if you overclock by raising the fsb to 155 and left the ratio the same, the pci bus would be 38.75 which many pci cards wont handle. if you change the ratio to 1/5 the pci bus then becomes 31, much closer to the 33 standard.

hope this helps