RAM speeds vs FSB speed

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killingfield1975

Gawd
Joined
Sep 18, 2006
Messages
636
Okay so the rule of overclocking is start off by lowering the multiplier to its lowest value?

Then increase FSB in increments

I'll lock down the speed of the PCI-E and PCI controllers at 33 and 100mhz

Then what to do with my RAM freqency?


Should i increase it or decrease my ram frequncy?
 
Not all CPU's have adjustable multipliers....

What type of CPU are you working with?

And yes, you want to raise the FSB, Im not sure what you mean by ram frequency's..do you mean timings?
 
killingfield1975 said:
Okay so the rule of overclocking is start off by lowering the multiplier to its lowest value?
Click to expand...

not at all, this is a way of raising the FSB/RAM speed without raising the CPU speed. 400fsb x9 multi =3600mhz, but 450x8 also equals 3600mhz. if your CPU can only get to 3.6ghz but your ram can go higher then 400mhz, use the 8x multi instead of the 9x you will get +200mhz fsb (quad pumped) while keeping the same CPU speed.
depending on the board, keep the 6600 on the 9x multi. with this chip the FSB and CPU seem to max out around the same time, this will yeild best performance(on 1:1 divider). when you know exactly what your hardware can do then you might be able to adjust this a little. its mostly for testing or overclocking RAM.
 
ghost6303 said:
not at all, this is a way of raising the FSB/RAM speed without raising the CPU speed. 400fsb x9 multi =3600mhz, but 450x8 also equals 3600mhz. if your CPU can only get to 3.6ghz but your ram can go higher then 400mhz, use the 8x multi instead of the 9x you will get +200mhz fsb (quad pumped) while keeping the same CPU speed.
depending on the board, keep the 6600 on the 9x multi. with this chip the FSB and CPU seem to max out around the same time, this will yeild best performance(on 1:1 divider). when you know exactly what your hardware can do then you might be able to adjust this a little. its mostly for testing or overclocking RAM.
Click to expand...


i see what your saying.

so its always better to get your ram higher when possible.

so where do i start? should i just start changing the FSB first then see where it locks up then increase the frequency on the ram? then at a certain point i'd probably want to drop the multipier down one to see if the ram can go higher while still pushing the FSB, right? when all of this adjusting is going on i also have to play around with the voltages?
 
killingfield1975 said:
i see what your saying.

so its always better to get your ram higher when possible.

so where do i start? should i just start changing the FSB first then see where it locks up then increase the frequency on the ram? then at a certain point i'd probably want to drop the multipier down one to see if the ram can go higher while still pushing the FSB, right? when all of this adjusting is going on i also have to play around with the voltages?
Click to expand...

yea start by setting all the default settings manualy in bios (ram timings,voltages, etc) dont leave them on auto. lock the ram divider to 1:1 (the 533 setting while at stock 266fsb) then start increasing fsb untill it wont work anymore, play with the voltage settings a little, rinse and repeat ad nausium, until you find the max your hardware/temps will alow. now you can try some different things like droping the multi to 8 and seeing if you can get some more out of your ram, or playing with the ram divider some. once you get it in the ballpark of where you want it go backward and start lowering the voltages untill it becomes unstable again, then bump it up a notch or two untill its stable. this way you can use the lowest voltage possible which will decrease the ware on your hardware and keep your temps as low as possible.
 
ghost6303 said:
yea start by setting all the default settings manualy in bios (ram timings,voltages, etc) dont leave them on auto. lock the ram divider to 1:1 (the 533 setting while at stock 266fsb) then start increasing fsb untill it wont work anymore, play with the voltage settings a little, rinse and repeat ad nausium, until you find the max your hardware/temps will alow. now you can try some different things like droping the multi to 8 and seeing if you can get some more out of your ram, or playing with the ram divider some. once you get it in the ballpark of where you want it go backward and start lowering the voltages untill it becomes unstable again, then bump it up a notch or two untill its stable. this way you can use the lowest voltage possible which will decrease the ware on your hardware and keep your temps as low as possible.
Click to expand...

dude after all the overclocking guide i have read i think i learned more from you in a matter of two or 3 post.

thanks for the help. i will try this and i guess the only way to actually understand this is to dig my hands into it. i will try this as soon as i get home from work.

thanks!!!
 
Why dont you post all your computer specifications, so we will have a better idea what can your computer do. anyway, simply just change the cpu frequency settings in the bios such as disable C1E option. then rise the FSB and voltages up.
 
e6600
abit Fatal1ty F-I90HD
patriot extreme low latency ddr2-800 4-4-4-12 2x512mb
western digital raptor 36.7GB
480 watt power supply
im using the video card that came with the motherboard (for now) until i get more funds.

windows xp
 
how do you lock the ram divider??? I have a P5B Delux or if you can give a general idea on where to look for it at.

Thanks!
 
Lamont Cranston said:
how do you lock the ram divider??? I have a P5B Delux or if you can give a general idea on where to look for it at.

Thanks!
Click to expand...

the option called "DRAM frequency" is what your looking for. the top setting in the drop down list is 1:1 ratio (533 while cpu frequency is set at 266, this number changes as you change cpu freq.).
 
Drewis said:
beware of your onboard video causing o/cing issues.
Click to expand...



whhaht? i thought it would only affect pci and pci-e bus? can i lock down the video? what happens if i disabled the video and got a cheapo pci-e video card and locked it down. would i be safe then?
 
dont mind him, i dont think he knows what hes talking about. onboard video usualy isnt a problem other then the fact that it generaly sucks, as long as all you need to see is your desktop then its fine, just dont try to play BF2 on full settings :p
 
Thanks ghost, i wasnt getting much on my oc'ing before but now that i have my fsb and ram in a 1:1 ratio i have my 6400 running at a nice 3.120 ghz on stock air cooling with temps toping out at around 63 degrees!
 
It is an E6400 running on an Asus P5B Deluxe with 2x512 Corsair DDR2800

Memory for now is running at about 390 mhz and i am sure it will go higher after i tweak some of the voltage settings
 
hmm damn, u probably have a conroe right,

I used it with an 820 it runs alot hotter
 
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