Beginners Guide to Overclocking

You will also need to know how to unlock your CPU multiplier!
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how do i do that for my sistem? never done it before :/
And does anyone knows how far my mobo could go ?

Edited: nm i found answer,there it is ,in case someone needs it!

On the Core 2 Duo chip you cannot unlock the clock multiplier in the upwards direction. On some motherboards but no others however, you can unlock it down. For example lets take the E6400. The clock multplier is 8. You cannot raise it to 9, because Intel locked it at 8 when it left the factory. However you can drop it down to 7 or 6 in some motherboards. This is useful if you have fast memory and want to run the memory at full speed by running a faster FSB speed.
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Im still quite unclear on the 1:1 ram ratio with CPU part.

I'm quite new and have the bits in my sig.

Basically I ideally wanted to run the ram 1:1, as it must surely affect running memory on a divider - mines running on 3:4.

Basically
m running on a 375mhz * 9 with a rated FSB of 1499. (just random numbers i threw at it first).

ATM im running at 3.4ghz, i've set vcore temp to 1.36v (slowly moving down. tested 9 hours stable with prime (but that's showing the memory on 3:4).

Temps hit around 59c on load, idle aint that far below @ 50c.

Unclear about how to set the memory 1:1, if i set the memory to linked mode if I adjust FSB it matches memory - if i set 1599 fsb in linked it tries to set the memory to 1599mhz?
 
setting the memory divider to 1:1 would have it runnin lower than its stock specs. 3:4 is the right settings for the ram at that speed. the ram you have is CellShock 2GB (2 x 1GB) DDR2 PC2-8000C4 1000MHz Dual Channel Kit
so your ram should be running at 500Mhz which it is. since your fsb is 375
375 x 4 = 1500
1500/3 = 500Mhz
which in effect is 1000Mhz DDR2, if you had the ram running at 1:1 it would be much lower.
 
moogle said:
setting the memory divider to 1:1 would have it runnin lower than its stock specs. 3:4 is the right settings for the ram at that speed. the ram you have is CellShock 2GB (2 x 1GB) DDR2 PC2-8000C4 1000MHz Dual Channel Kit
so your ram should be running at 500Mhz which it is. since your fsb is 375
375 x 4 = 1500
1500/3 = 500Mhz
which in effect is 1000Mhz DDR2, if you had the ram running at 1:1 it would be much lower.
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Excelllente! thanks mate,that's cleared it up for me in one!
 
it's no problem, you should search google for a program called cpu-z, it will show you the speed of your cpu and your ram, it's a tool used by all overclockers i'd say.
 
drak3 said:
It would be cool if there was a link to safety limits on Vcore.
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I depends on chip and cooling (Intel CPUs are more sensitive than AMDs).
Usually +10% of default Vcore is not dangerous for good aircooled/watercooled systems.
For Intel owners --> check the throttling --> don't forget it!
I would like to inform this link --> Must have program's for overclockers and links Guidemania is a huge collection of o/c guides etc..
OcBible is for o/c assistance but it is beyond of my scope to explain here both programs.

geordiepaul said:
RAM Divider? Does this have a different definition depending on motherboard?
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FSB/RAM ratio is other one.

moogle said:
check the start of the thread, most of the programs are up there.
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I am not blind :D I read the thread carefully but my thread there at TechPowerUp! has more links. :)
But as I see here at OCUK is a similar thread but it created after 5/2/2007.
Thus I posted there some links :)
No multiple posts (edited later) ;)
 
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Jokester said:
Finding Max FSB
First off, for CPUs that allow you to change (lower) the CPU multiplier, it is handy to determine what the maximum stable FSB of you're MB is. If you don't have the option to lower multipliers skip this section.

1. Increase the FSB by 5MHz.
2. Reduce the multiplier and RAM divider if requried so that both are at stock speeds or slightly less.
3. Boot into windows and run SP2004 Blend Test, this will also stress the chipset and RAM so will be testing the FSB not just the CPU.
4. Run it for 30mins monitoring temperatures, if it doesn't fail goto 1 again, if it fails, go to step 5.
5. Increase the chipset voltage a notch and go back to 4.

Eventually increasing the voltage will have little effect on increasing the FSB. At this point run a full range of tests and increase the duration of your SP2004 testing to 8 hours (some recomend more, some less, for me 8 hours is how long I'm at work give or take). If it fails any tests, reduce the FSB by 5MHz and retest until the required level of stability is achieved.

Finding Max CPU Clockspeed

1. Increase the FSB by 5MHz.
2. Decrease the RAM divider if required to keep it at stock or less
3. Run SP2004 Small FFT to test stability
4. Run it for 30mins, it may be worth testing for FSB stability as well if you haven't already proven FSB stability at this point. If it passes return to 1, if it fails goto 5. Keep an eye on temperatures whilst testing.
5. Increase the Vcore a notch and repeat the testing phase until temperatures are getting close to the maximum for your CPU, or the voltage increases don't allow you to overclock any further.


Previous Overclocking Guide

Jokester
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Hope you could just clarify then:
so in the first part of the guide above (finding max fsb) i should be increasing my "VTT CPU Voltage" . here it says max it out?? - although its the non plus version in the link will this still apply to my P5n32 SLI plus ?

Then in the second part i increase the Vcore whilst upping the FSB further until stable?

Also do i need to alter the NB and SB core voltages? (on P5n32 SLI plus)


cheers! :p
 
I was seriously thinking about overclocking my CPU when I first built it but I was never brave enough, still not to be honest... I came over here to have a look at this guide and although it's a very good guide :thumbs: it's really pointed out how complicated the process is for a beginner.

Considering that you have to wait 8 hours per every slight miniscule change I think I'd get a bit apprehensive. I wish you could hire people to come to your house and overclock your CPU for you :D
 
Tigjaw said:
I was seriously thinking about overclocking my CPU when I first built it but I was never brave enough, still not to be honest... I came over here to have a look at this guide and although it's a very good guide :thumbs: it's really pointed out how complicated the process is for a beginner.

Considering that you have to wait 8 hours per every slight miniscule change I think I'd get a bit apprehensive. I wish you could hire people to come to your house and overclock your CPU for you :D
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This guide is great.. Really easy to understand.

Ive never overclocked a cpu before. And with this guide ( Which i printed off ) I overclocked my cpu and was up and running in minutes :cool:

5* for this thread
 
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