Overclocking noob

newbcake

newbcake

newbcake

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Joined
18 Mar 2009
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79
Hey guys, im new so try and be kind

My processor is a Core Duo e6750 (2.66GHz) and i finally plucked up the courage and tried to overclock it last week. It has a stock cooler on and cased in an Antec 900.

i got it up to 3.1ghz, by changing the FSB and raising the cpu voltages up from 1.23 to 1.26.

I ran some tests and it idled at around 40, and load around 70. However its not stable, it keeps crashing. I've read the guide on the sticky, but still confused on what to do.

Im at university at the moment, and at home is a new cpu cooler waiting for me.

any help would be appreciated.
 
keep raising the voltage a little bit at a time and check your rams freq an try to run it at 1:1 if possible
 
thanks, whats a safe voltage?
and if i increase the FSB, do i need to decrease the frequency of the ram proportionally??

thanks

Also, if the volts go up, wont the temperature aswell??
since my cpu temp is quite high already
 
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It could be the voltage being too low, temp being too high, ram becoming unstable, or any number of other issues.

Did you follow the basic overclocking sticky guide?
 
what vcore are you on at the moment, try jumping to something like 1.35 and if its stable keep lowering it untill it is not and then put it back up by two steps
 
thanks for advise, sorry for the many questions, im just tryin to learn.

i've set everything back to stock for now, wen i get home tomoz i'll bumb it up to 3.1ghz again and this time with 1.35v.

Can anyone explain why i need to slow down my ram if i increase my FSB?
 
Simple version:

Your ram has a max frequency it can run at and above that will be unstable. As you increase the FSB the related ram frequency also increases and hence you need to lower it to keep it within spec.
 
ohh makes sense

soo glad i found this site, easy to get answers :D

soo do u know the maths for the decrease in RAM? so say i increase my cpu to 3.1, what would i decrease my RAM to? my ram is 800mhz
 
You should try and keep it at 800 until you have the CPU/FSB stable.

Once you're happy with the CPU/FSB then you can start OCing the RAM (if you wish)

Steve
 
In my BIOS the ram is set using various multiples so depending on what the FSB is set to you need to pick one that keeps the RAM in/under spec.

At the moment I think I've got my FSB running at 320 and IIRC the multipler is set 5:4 to give 400 (800 DDR)
 
thanks for advice.

at the moment i've set everything back to stock, and increased my FSB to 375 with x8 multipliyer to give me 3GHz, temps are staying below 60 degrees with full load on stock cooler, so im quite happy.

This is where im confused now. i've decreased my ram speed from 800 to 667. im not entirely sure why i put it down to that speed.

If my FSB is below 400, can i keep my ram at 800 or do i still have to decrease it?
 
hey guys, just an update

Stock Vcore, Ram at 667 Mhz. CPU at 3.1Ghz, temps were 47/65, but it crashed while being tested.

Should i just increase the Vcore to like 1.35v and try again?
 
Itll be easier if you move in smaller steps. Set the ram speed to whatever the fsb is x2 and leave it there. Your ram will now be fine until at least 400fsb, at which point your problems may increase.

Start off with the stock fsb, and test it to see if it is stable. If so, then increase fsb by a small amount and retest. The guide will recommend doing this with the lowest multiplier available first, to try to find (roughly) your highest possible fsb. This information will help later on when more vcore just doesn't seem to help. If you don't bother then fair enough, but still go for +5 fsb each time at most. +1 would be better but very time consuming :)
 
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