newbie question? multiplextor

[toonesy]

to my knowledge there are only two ways to increase the CPU speed: 1)to increase the front side bus and 2) to increase the multiplextor speed(is this correct? are their other ways?). i understand that the cpu sits on the FSB and it stands for the throughout of data transfer between memory and cpu (right)? so where is the multiplxtor? is it on the motherboard? what does it do?

also, when people talk about increasing their memory is this the same as increasing the FSB?

where can i get more information on over clocking? books and websites please?

thanks

 

[Azratax]

Ok, u have the wrong word here. The term is multiplier or clock multiplier. The clockmult is part of the chip. In inhell cpus, the clock mult. is permenently and apperently irrevocably locked at the factory. AMD cpu's are also locked to a certain clock mult, but can be unlocked by modifying the L1 bridges on the chip.

The problem with FSB overclocking is that everything else in the system is also running at a higher speed, and many chipsets (such as the very popular via KT133) will not like more than a 5-10% overclock on the fsb. Alot of ram does not run at these high speeds either.

Thus when it is an option, multiplier overclocking is preferable. EVen better is changing bothe the fsb and the multplier to get the combination that works best for your CPU and MB/RAM. (and if you were listening (er, reading ) you will have likely deduced that changing the FSB also increases memory bandwidth and MB<->CPU bandwidth).

Before you start doing any of this make sure you have a way to monitor the CPU temp from within wondows, and that you have a good heatsink/fan.
-Az

 

[smp]

the multiplier controls the speed of the chip.. so if you have a 900 mhz tbird.. the multiplier is ----> 9 x 100
or if you have a 750 duron.. the multiplier is 7.5 x 100
Notice that 100 is the FSB speed.. so if you up the FSB to say.. 105.. then you get 9 x 105 for a grand total of 945..
Now, when you run your ram at 133 (pc133) and you up the fsb (again, by five for examples sake) your ram will run at 138.. some ram doesn't like this.. (like mine) so you need either really good ram.. or you can run your ram at 100 + 5 (105) and run that 900 at 945 with less memory bandwidth.. (which is what I've been doing for a few days now, just so I can say I'm oc'd )..
So I hope that helped.. I don't really know much about overclocking PIII's.. but I hear that you can only do it by boosting the FSB....
Also, when you change the multiplier and FSB, and overclock your chip.. it might be thirsty for more juice.. so you can up the Vcore voltage in the bios or with DIP switches on the motherboard..
(I haven't gone this far)
Now, when you do this stuff, your chip is gonna run HOT boy.. so you better get a really good cooling system.. a good heatsink and fan is a must (HSF).. and good case cooling is important too.. I hope this helps and that someone will correct me if I made any mistakes.