Few things come into consideration there.
Ur timings are obviously the xMulti X FSB for the cpu - however the FSB is also a factor as to how fast the memory is being run.
Bioses tend to look different, but these days the critical settings for these on quality~ mobos are the same. Sometimes worded slightly differently.
The FSB factors into both the cpu and the memory by means of a ratio. To get the memory to it`s lowest value for FSB factor, the ratio can be made 1:1. So that whatever the FSB value is set at, the memory will do the same.
Memory has it`s limitations depending on which or what memory u purchase. The stick`s description and speeds are labeled on the side of the stick. This is the recommended~ operation speeds, more details in terms of settings for memory can be read off them via utils like CPU-z. Speeds and settings become very familiar to u as they`re often the same from stick to stick with the same descriptions.
Now u know the range of FSB the memory will operate at, u now know that all the x6/x7/x8/etc can be put against this same range to produce ur hz speed for the cpu. Here it`s a case of knowing how far ur cpu will go before it either craps out, overheats or just bsods on u.
These days, on basic air oc`ing, cpus don`t need as much (if any) massaging of voltage to get a really good, everyday oc. When u go in further, with more experience, u`ll want to increase it just to see how far u can push things. Of course more voltage means more heat, as the cpu draws current throw itself in direct relation to the work it does. P (power) = V (volts) x I (amps), which is a basic fundamental physic/electronic rule, P of course measured in W (watts). More power, more heat.
So keeping the voltage the same, knowing ur FSB range, and the multiplier values u have available, u make changes to the FSB or multiplier to get the best clock, with safe temps for the cpu. Increasing the FSB by 1, u know it`ll mean increasing the cpu speed by the value of the muliplier. The best way to get the highest speed for the cpu, whilst keeping the memory working, would be to use the highest multiplier. With a 1:1 ratio.
What many people do tho, is to do the above method to find out how fast their cpu can go (each cpu is different, even ones with the same name), and then look at what memory speed they`ve ended up with. Their goal then is to massage all the different factors to get their cpu working at it`s fastest alongside memory at it`s fastest. Here they already know the high end of the cpu speed in hz, so they can kinda work backwards to the above method - change multipliers, increase the fsb, all the time trying to keep in the same ball park as the max cpu speed. Often involving changing the cpu:ram fsb ratio along the way.
Depends on type of memory, depends on cpu.
Whilst all this is going on, ur mobo is running an `effective` FSB. This effective FSB is a result of what u`ve done above, on Quad based Abit mobos I know that the effective FSB is 4x the FSB I set when oc`ing. The mobos are rated at xxxx/1333/1600/2000*oc, which is an `effective` limiter to u setting ur FSB above to 1000.. the mobo won`t take it. Afaik, it uses this bus speed for it`s north/south bridge operations, similarly the higher it goes, the more current gets drawn through it, which we know equals heat. (hence people going 3rd party coolers on mobos for n/s bridge). I know that if my mobo is rated 1600, I don`t want to push the effective FSB too far over that. They will go alot higher, often close to 2000 or more, but unless u`ve taken care of ur mobo components, ur mobo will give in - make noises, quit. (personally I`m scared of this value atm cos I`m on my 3rd IX38). CPU-z again will give u all this information at a desktop level.
The thing to consider over ALL of this is to take small steps. Never go adding 20 to ur FSB just on a whim, go up in small amounts, 5 - maybe 10/15 at most - test it with desktop stress tools, the likes u see throughout the forum, then increase some more if it`s 100% stable. Big jumps get u no where, and I`ve noticed some mobos not liking big jumps even tho I know they`ll do the speeds, they just like being built up to these levels.
*brain fart*
