I think for your situation, the ratio of 4:5 is suitable, meaning keep your RAM at stock speed(or higher) and just fiddle around with the highest FSB you can squeeze out from the proc.

Refer to the bios reading for Vcore; yes the C-puz reading is lower because of VDroop... disable LLC (load -Line Calibration) for overclocking stability and improves the VDroop fluctuations...

I personally enabled LLC for healthiness of the proc, but do that if of OC is more than stable, if not just disable that feature in bios (LLC)


Somehow I have the feeling you have maxed out on OC'ing the proc's FSB and it's up to the Vcore to do some stabling.
But you said that you bump the Vcore up to 1.4v and still unstable...well it's unrecommended to go higher though...

3.75ghz is a good OC'ing result, to get to 4.0gh with extra loads (voltage) on the hardware isn't worth it... because I did a benchmark with my proc on 3.8ghz and 4.0ghz, and there's no difference in performance...

You should be thinking on tightening up the Performance Level and push the RAM's clock's.
This will have major system improvement than to get pass that 3.75ghz plateau...

actually have to thank to u bro for enlighten me with the oc of my rig.. u taught me a lot too but i have to admit some part im still confused =p.. hehe

well i have that feeling i might have hit the fsb wall already.. bcoz no matter how i try to up vcore, lower multi, bump this bump that its still not going anywhere lor.. i might suspect my giga board is not really overclockable dat good. ep43-ud3l..

ok now wat i need to do is -
-check if my oc is stable before i disable LLC rite?
-if im happy wif 3.75 and everthing stable i have to tighten my PL and RAMs clock. hmm its tough but i will try goggling around for more info on those.. clocks are those 5-5-5-15 rite?

so bor Jo, do u think my 3.75ghz on 1.38vcore is good enuff based on my temps? is there any way i could improve it? say like lowering vcore and try it.. appreciate ur time to reply my post. thanks man,.

Clocks are the mhz, 5-5-5-15 is timing.

One of the criteria of a good OC'ing result are those with the lowest stable Vcore possible for 24/7 usage - so to get the Vcore lower than 1.38v is benefiting the longevity of the proc.

Since you have a Giga board, the PL (which usually the term use on Asus boards) are in this case, tRD.

First, find the default value of your board's tRD (meaning change the setting from AUTO to manual) then lower it in increments while testing for stability with prime95 and performance with Everest ->' Cache and Memory Benchmark' (it's a freeware software, just download it)



Since this is no longer a proc OC'ing, you should ask other sifus on other related thread...

nice explanation. thx man.. i will try those steps above but before that i will try to tune a bit on my proc OC first.. hope i get nice stability on my proc..

Yup, try to find the 'lowest stable Vcore' for your proc.
Anything above Intel's maximum recommendation of 1.3625v is taking it's toll on the 45nm procs..

Btw, your P43 chipset mobo is good for OC'ing, those Asus Maximus Formula's, Rampage, Bigbands, etc. are just rich man's toys, any P45 or at least P43 chipset mobo can OC decently, just that the P45's are known to edge the P43 a bit..
But that's not something to be that concern about, for OC'ing stability, it's the hardware itself, mostly the mobo....for instance the 'power phase design' (those dark box like capacitors that surrounds the 775 socket) are more important for reliability of 24/7 duty and will endure longer OC abuse...

Having said, no need to upgrade to P45 for the sake of this, you better off using your current giga board till it breaks down in years and allocate the budget for the upgrade of socket 1156 (i3, i5, i7 860) in the future...

EDIT:
Just read back the pages and realize you have a 4G HyperX DDR2 1066mhz RAM, right?

Keep the clocks(mhz) stock or OC the clocks over 1066mhz, if you can get your RAM to OC near 1200 (if your mobo supports up to that frequency) your enhance the overall system performance!
That HyperX is meant to be OC

That '1:1 ratio' is just a primary goal for any one who tries to OC their proc, there's a whole new world of OC'ing if you past that '1:1 ratio' point...overall system performance plays a bigger role get your PC at peak performance.
Do download Everest to see the performance increase when tighening up the tRD or OC'ing the RAMs...

This post has been edited by JoBigShow: Jun 28 2010, 02:34 PM

haha.. ya its true.. i purposely bought this rig to learn and practice my OC;'ing skills before i get something meaner in future.. haha probably i think so much blaming the mobo bcoz OC'ing is bout trial and error.. sometimes my mind go blunt thinking wat went wrong.. but hey, the more trouble i get into, the more i learn..

yeah i remember u use hyperx too.. i will try to get my ram fly..

done wif 3.75mhz at the moment. Ram s cant manage to pull 1200mhz =(..
My Gaygabyte mobo doesnt have LLC option =.=
Some how its a great exp for newbie like me.

So, basically im gonna reset everything to default and pull out another OC from the beggining step by step. Previously was done not in a proper way, so im not so satisfied.. =p

Some screenie on my first shot..
3080mhz on stock Vcore.
idle temp forgot to record but load is 49-51
everything was on default - rams/mch core/PLL
stress small FFT on CPU only.coz wanted to concentrate on CPU OC before moving on to RAMS.

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Added on July 18, 2010, 2:14 amits my birthday today!! forget jor.

This post has been edited by evoangel: Jul 18 2010, 02:14 AM

I plan to OC my E7400. Here is my configuration:

Intel C2D E7400 @ 2.8Ghz with Stock Cooler
Kingston DDR2 800Mhz Dual Channel 4GB RAM
Gigabyte EP45-UD3L Motherboard
1 x 640GB WD SATA HDD
1 x 1.5TB WD SATA HDD
1 x 2TB WD SATA HDD
1 x DVDWriter SATA
Sapphire HD4830 512MB DDR3 Graphic Card
Cooler Master Extreme Power Plus 500W Power supply

How much I can overclock with my CPU with stock cooler?

Please advise.

Thanks.

haha, just try your luck.
better don't let the cpu temperature go above 74'c as stated here:
http://ark.intel.com/Product.aspx?id=36500...B9Y,SLGQ8,SLGW3