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A non extreme overclock for Q6600

post #1 of 5
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I got an Intel core2 quad @ 2.4GHz and I'm looking for some specifications for overclocking. My overclock is (probably) bottlenecked by my Xilence cooler
that's why I think an overclock at around 2.8 GHz is an achieveable goal. Am I right? My motherboard is a P35-DS3.

I read some guides on the net, everyone lists several clock frequencies and voltages and what not, mentioning ratios in the form of 5-5-5-15 etc. Can someone explain to me what those ratios mean?

Last, does someone have a working setting that they can share with me? Some exact values that I can punch in? Thanks in advance for your answers.
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Intel Core2 Quad CPU Q6600 @2.4GHz P35-DS3 AMD Radeon HD6950 2x Ceon DDRII800 2Gb CLS 
OSMonitorKeyboardPower
Win 7 32bit ultimate AOC 2216Va G15 Logitech POWER Pentium IV & PFC model LC6550G version 2.0 
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some random pieces of plastic :P G5 Logitech Razer Mantis speed 
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post #2 of 5
On that motherboard, you can do 3.2ghz fairly easy.
All you have to do is set FSB to 400mhz, multi to x8, vcore at 1.4v and gradually decrease it until its unstable then up it a notch, ram at 2.0x so you get a 1:1 ratio, timings at 5.5.5.15 with 1.9v and thats about it.
That cooler should be enough at 3.2ghz if you have decent air flow.

Test stability with Intel Burn Test.
Also, don't forget to manually set pcie freq @ 100
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post #3 of 5
3.0 is a good mild OC for a G0 Q6600 and a midrange cooler. You should be able to get it at stock VCore.
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post #4 of 5
Quote:
Originally Posted by 2thAche View Post
3.0 is a good mild OC for a G0 Q6600 and a midrange cooler. You should be able to get it at stock VCore.
this^^ 3.0ghz is a decent overclock for this chip.
some chips can go further than others and may also need less vcore. (the voltage for the cpu)

first of all regarding 5-5-5-15, this is the timings for ram, so dont mess with these unless you do your research.
on the box or the ram stick itself, it will say its default timing, eg 5-5-5-15
my ram is 5-5-5-15. also it will say the voltage eg. 1.8v, 1.9v etc..
cpu-z will tell you all this.

this is a very basic explanation of overclocking

its basic maths. your Q6600 is rated at 1066mhz. you always divide this number by 4 so 1066/4= 266, this is your fsb. (or cpu frequency)
then your processor (cpu) has a multiplier of 9 (or cpu ratio)
so 266 x 9 = 2394mhz or 2.4GHz, your stock speed

unlink your ram, so it stays at stock speeds, you can overclock the ram later
this means leave it alone and keep it at its stock speed

can you raise the fsb? yours is now 266. (266 x 9 = 2394mb or 2.4ghz ) try rising it to 280
boot into windows
download realtemp and coretemp (google them)
install and run them
then download intel burn test (ibt) and run it. (or prime95, then run small fft's,)
have a look in task manager and notice how much free ram is listed.

in ibt set threads to 4 (for 4 cores) and then click on custom ram and enter an amount just below the free amount.
eg. i have 2520mb free ram. so i enter 2500 into the custom ram.
run the test for 5 passes. for now,
and then at final speed you want, run for 50 passes
keep an eye on temps (do not let it go over 75.c)

if test runs fine, go back into bios, and change frequency (fsb) to 300 and repeat the tests.
keep doing this in 20mhz steps until windows will not boot. then just go back a step (remove 20 from the fsb) to the last stable frequency,
or
(most G0 revision cpu's will get to 3.0ghz without raising the voltage,)

just raise the cpu voltage a couple of levels. it should now boot.
its a balancing act, higher voltages will get you higher fsb, but it will also give you higher temps.
my B3 revision Q6600 needs 1.39v in the bios to get to 3.3ghz.
if yours is a G0 revision, you should be able to get this speed at a lower voltage
the Q6600 can handle upto 1.5v for everyday use

the trick is to do this step by step, and not go straight to eg. 400 (400 x 9= 3.6ghz), just take your time.

also for some reason using the x9 multi, i couldn't get past 3.0ghz
so i dropped it to a x8 multi and i got it to 3.3ghz easily.
get the cpu maxed before increasing the ram speed

or if you dont want to use IBT, then use prime95. (or use both)

Please get a proper cooler.
if on a budget, try the hyper 212 or prolimetech Megahalems Rev.B with 2 fans strapped on
money no object then the noctua Nh d14 or silver arrow
also reccommend MX-4 thermal paste

edit. also click on user cp on top of page and then fill in your system details.
that is a decent motherboard, with a good cooler you mayget upto 3.4-3.6 or higher, depending on the vid of the chip, temps etc...
Edited by j.col - 4/28/11 at 1:42pm
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Old Slow Hand
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post #5 of 5
Thread Starter 
Thanks guys, that answered my questions perfectly. I'll go OC it now and report back

EDIT: So I went into the bios and changed frequency (after 2 restarts with testing) to 300 x 9. Also changed the pcie frequency to 100. I left the voltage controls on auto and the ram controls on auto. Whether ram is linked or not, I dont know.

Attached the screenshots, what does cached memory mean? When I tried to use "available" memory as the custom memory in IBT the test completed in 0.2 secs. Using "free" memory the test ran fine for 1 min each pass.

Can you look at the screenshots and tell me if I screwed anything up, at all? Gonna run 50 passes in IBT now, but I dont think temp will go over 75. Thanks for all the help!

EDIT 2: Ran 50 passes at once, each took about 45 seconds. max temp reached was 72. Guess I'm in the green


Edited by Marvos - 4/29/11 at 7:53am
My comp
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core2 Quad CPU Q6600 @2.4GHz P35-DS3 AMD Radeon HD6950 2x Ceon DDRII800 2Gb CLS 
OSMonitorKeyboardPower
Win 7 32bit ultimate AOC 2216Va G15 Logitech POWER Pentium IV & PFC model LC6550G version 2.0 
CaseMouseMouse Pad
some random pieces of plastic :P G5 Logitech Razer Mantis speed 
  hide details  
Reply
My comp
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core2 Quad CPU Q6600 @2.4GHz P35-DS3 AMD Radeon HD6950 2x Ceon DDRII800 2Gb CLS 
OSMonitorKeyboardPower
Win 7 32bit ultimate AOC 2216Va G15 Logitech POWER Pentium IV & PFC model LC6550G version 2.0 
CaseMouseMouse Pad
some random pieces of plastic :P G5 Logitech Razer Mantis speed 
  hide details  
Reply
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