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FSB vs Multi OC

post #1 of 17
Thread Starter 
some people say fsb doesnt matter anymore and others tell me to go for a multi overclock

which one should i do? with multi overclock i seem to have a much more stable oc with less volts

1.45 compared to 1.5 @4200mhz
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post #2 of 17
Multi is great when your cpu is unlocked. Idk, I guess I just feel more comfortable using the multiplier rather than jacking the fsb up. Otherwise you can't use it

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post #3 of 17
FSB isnt used like it is in the old 775 boards, since AMD has the IMC on die. All its used for is to basically get things to have higher clock rates. Multi/FSB is really dependant on which one you use, i use both, some use neither or just one.
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post #4 of 17
exzited, you tend to get the most noticeable gains with CPU-NB overclocks after you've set a CPU overclock. Having said that, it might be a good idea to explore just how high you can increase your CPU-NB frequency. Some chips allow for just simple CPU-NB multiplier increases; others require a combination of multiplier + frequency changes (this is the far more common scenario).

If you're content with keeping your 4.2GHz CPU frequency, then do it via the method that would require the least amount of voltage to keep stability (in your case, a multiplier increase works best, as you stated). But if you want to get more quantifiable (both in benchmarks and at the "keyboard level" - differences you can perceive) increases in performance, I would explore just how much you can increase your CPU-NB speed.

Good luck.
    
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post #5 of 17
Thread Starter 
Quote:
Originally Posted by LocKDowN2222* View Post
Multi is great when your cpu is unlocked. Idk, I guess I just feel more comfortable using the multiplier rather than jacking the fsb up. Otherwise you can't use it

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so fsb does matter?

or doesnt >.>
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post #6 of 17
Quote:
Originally Posted by exzited View Post
so fsb does matter?

or doesnt >.>
FSB (really an incorrect term; the more technically correct term nowadays is "reference clock" or "base clock") matters more for systems that don't allow for upward adjustments of your CPU's multiplier. But even with Black Edition chips, I still think there is great value in using a combination of CPU multiplier and reference clock adjustments. This method might be more tedious, but it allows for more flexibility in adjusting your RAM speeds and CPU-NB speeds.
    
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post #7 of 17
Thread Starter 
Quote:
Originally Posted by txtmstrjoe View Post
FSB (really an incorrect term; the more technically correct term nowadays is "reference clock" or "base clock") matters more for systems that don't allow for upward adjustments of your CPU's multiplier. But even with Black Edition chips, I still think there is great value in using a combination of CPU multiplier and reference clock adjustments. This method might be more tedious, but it allows for more flexibility in adjusting your RAM speeds and CPU-NB speeds.
why does 4200 21x200 1.45v seem stable opposed to 4212 18x234 1.5v

even though the voltage is lower
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post #8 of 17
Call it a fine tune.

You should try overclocking via cpu multi first, find a stable spot then focus on cpu-nb frequency. With fsb OC, you need to set everything yourself. However still, i don't think all boards like fsb+cpu-nb overclock(stability wise)
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post #9 of 17
Quote:
Originally Posted by exzited View Post
why does 4200 21x200 1.45v seem stable opposed to 4212 18x234 1.5v

even though the voltage is lower
Can be about motherboard as I just mentioned, with FSB OC, regular NB voltage comes into play as well
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post #10 of 17
Thread Starter 
Quote:
Originally Posted by Catscratch View Post
Can be about motherboard as I just mentioned, with FSB OC, regular NB voltage comes into play as well
nb and ht is at stock

right now, im just testing stability for now with 1.45v
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