hmm..will do..

i dropped the multiplier from 12 to 11.

stock voltage..

running SP2004 for close to an hour already.

still stable..

speed is 2.93GHz

Need some advice guys..
I'm using E7400 (default speed is at 2.8Ghz) with Kingston cheap RAM DDR2 667Mhz.

Tried to overclock it to 3.15Ghz using the default multiplier, 10.5.
300x10.5
The memory speed I set to 'auto' and after the overclock, the memory speed goes up to 750Mhz.

The question I wanna ask, in order for me to go way higher:

1) Should I stay with the default multiplier? 10.5
2) Should I let the system auto overclock my memory speed?
3) When should I adjust the vCore?

And give me some tips to make my OC more stable..
thanks!

dear bro.it is better to OC one component at a time.

1)yup,just stay there. unless u wanna wanna find your FSB wall,then set to lowest mulitplier.

2)since now u wanna OC ur proc,i suggest u set the memory speed to clock speed by changing the ram multiplier (for your case,its 667MHz).

3)try OC a little with stock voltage.when fail at stock voltage,increase vcore just a little and test again.keep increasing little by little only until u get a stable system.

Thanks for the advice!
Should I set the memory speed to default 667Mhz or should I higher the speed?

""2)since now u wanna OC ur proc,i suggest u set the memory speed to stock speed by changing the ram multiplier (for your case,its 667MHz).""

sry there.edited.its stock speed.

so,u should set your memory speed to stock speed at or near 667MHz.

actually, if ur processor can hit high fsb, better u set ur ram speed to run at 533, this way, it'll make ur dram: fsb ratio to be 1:1 and avoid ur ram from bottlenecking the oc. U need to try various settings on different type of mobo to set the ratio to 1:1. Boards like gigabyte allows u to select it directly others would have its own way of selecting it. Do note that, the 1:1 is only applicable to Intel chipset and on high-end Nvidia boards like 680i, 780i, selecting 1:1 is wrong, coz the nvidia architecture is a little different.

waah.. lower the RAM speed? But why when I set it to auto, my system will set the speed higher if I OC my cpu?
Does overclocking CPU actually needs RAM to have higher clockspeed too?

ohoo yeah.ur right, lowering the memory speed below stock is better in order to reach higher fsb. why didnt i thought of that.

Actually u don't lower ur ram speed, just the ratio. If u keep it at auto, it'll be default at 667.

Think of it this way:


in a marathon scenario

Ur processor, if its fsb is 1066, it starts running from 266mhz bus speed all the way to 400mhz, in which ur processor has run 134mhz ahead. And with the multiplier, u get the speed of ur processor and when u (400mhz x 4) u get ur rated fsb speed.

Ur rams will run together with ur processor speed. If you keep to auto or the default fsb, which means a ddr2 667 stick of ram starts to run from 333mhz to 467mhz, equivalent to 934mhz on ddr2 speed. If ur ram can't oc high, this would b the highest u can go and ur oc will not able to go any further. But if u know ur ram potential, for example if u own a DDR2 1066mhz ram, it means ur ram can run at the speed of 533mhz of the bus speed.

Then u should lower ur ratio of the dram: fsb to 1:1, and let ur ram start to run from 266mhz on wards b4 it reaches it's max potential of 533.

Imagine a ddr2 1066 ram with a E8400 processor:

by default its a 1333fsb processor, which means its starts to run from 333mhz on the bus speed/cpu clock speed. in order for it to reach 4ghz, it needs to have 500mhz x 8 = 4ghz. Therefore, the proc needs to run from 333mhz to 500mhz = 167mhz increase. If you set ur dram: fsb ratio to 1:1, it means that ur ram will start running from 667mhz (333mhz x 2). It'll run alongside ur processor speed and when the processor reaches 500mhz on the fsb, ur ram reaches 1000mhz too. This means ur ram has sufficient length(533mhz) to run along with ur processor b4 it holds ur processor back from going further. So, if u can have a good batch of E8400 E0 which can hit higher fsb, ur DDR2 1066 ram can still go along with it b4 reaching its maximum potentials.

Rams with chipsets like Micron D9gmh and D9gkz on 1gb per sticks all has the potential of reaching 1200mhz, which is equivalent to 600mhz on the bus speed, so u can imagine the headroom that these rams provides to allow u to oc further. Do take note on the timing of the rams is also important.

@hazairi

1. the least u can do is state the hardwares u running
2. u absolutely MUST read the oc guideline cuz what u're doin is dangerous
-set auto>mobo set v @ crazy high v> u dun monitor/dunno wats the safe range -----------> DIEEEEEE

Gee, thanks for the explanation..
Now I understand much of it..

---

Added on March 9, 2009, 9:11 pmI'm using E7400, stock speed is at 2.8Ghz. My RAM is a cheap Kingston RAM 1GBx2 stock speed of 667Mhz. Using mobo of P5Q-PRO.
I managed to OC till 3.46Ghz (330x10.5). My RAM clock runs at 395x2.
I'm still testing the stability at this speed before I proceed to OC it higher..

This post has been edited by hazairi: Mar 9 2009, 09:11 PM

*i hope this is the rite bios template for your mobo*


why dun u post it in this way
maybe others can help
though im not really familiar with your bios
but it shud look sumting lik the above since it is under AMI

Hehe.. For RAM speed, i just set it to auto settings. I only set the RAM total clock speed and the rest of calculations is being done automatically.

Currently trying to OC till 3.46Ghz (330x10.5) and my memory I set to 661Mhz (330.5x2). The Vcore is default which is ranging from 1.19-1.22v.

Still on the stress testing process since few days. Anyway, when I ran Prime95, it can actually reach till more than 90 celcius!!
Idle temperature is at 38-42 celcius.

Is that normal? Reaching till more than 90 celcius in Prime95 test.

Another question, if I set the memory speed higher than the cpu bus speed, will there be any side effect?

decided to post one of my ss during stress test

@uzairi, where's ur template? cannot find la hahaha


Attached thumbnail(s)

@iBenq,

nice Vcore to run 3.6 quad. what cooler and fan in used?

@overclockalbert

ifx14 and 3x sanyo denki

ibenq

takkan 1024mb sahaja

1024mb ajer la nak apa lagi ... 1997 max ajer
i think if 1997mb, shud be ard 63~65c

prime95 pun cannot 60c

Hello guys, what must I do in order to make my i7 920 run at 3.5GHz?

this thread is a core 2 series thread. urs is i7, wrong thread la dude