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Topic # 91699 19-Oct-2011 11:26
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I need to overclock my Q6600 to about 2.8 Ghz. Does anyone know how to do this in a way which is not too complicated?

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  Reply # 535102 19-Oct-2011 12:16
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http://www.bit-tech.net/hardware/cpus/2007/07/25/overclocking_intel_core_2_quad_q6600/2

Keep in mind though, these guys probably used 3rd party heats skinks etc to keep the temps down etc.

OCing can be an expensive sport, so make sure its what you really want to try.... and can you handle not having a working system if it all goes wrong ;)




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  Reply # 535103 19-Oct-2011 12:18
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Hiya Goodboy, do you happen to know what Motherboard you have? some motherboards have windows applications which can overclock on the fly which would be the easiest method by far.
Something like Cpu-z will be able to tell you if you're not sure and unwilling to venture inside the computer case.


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  Reply # 535108 19-Oct-2011 12:24
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This seems like like giving a Chihuahua steroids... sure it'll be bigger than it was, but it's still just a Chihuahua.

You might get a bit more CPU performance, which may or may not translate to real world performance, but I/O will still slow things down.




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  Reply # 535126 19-Oct-2011 13:11
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hi there motherboard is Asus P5K SE which is an overclocking motherboard i bought for my cpu.

Are there any good overclocking utilities for this motherboard at all? or do I have to do it manually through bios?

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  Reply # 535135 19-Oct-2011 13:47
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Ive always done my overclocking via the BIOS, software options usually limit how much you can do to retain the warranty etc.
I havent overclocked a PC in years now tho...




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  Reply # 535138 19-Oct-2011 14:00
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The first google search result for Asus P5k SE is Asus's website with a downloads link.
http://www.asus.com/Motherboards/Intel_Socket_775/P5K_SE/#download

The Ai Suite under utilities looks to be what you are after, I haven't used this utility so cannot tell you more about it than that but the very small bit of reading indicates that it isn't great at overclocking and not overly stable.
Bios overclocking is certainly your best bet.

Please do take into account what Xpd said about cooling and the hazards of it.
Additionally make sure you are running the latest Bios for your motherboard, again available on Asus's website.

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  Reply # 535144 19-Oct-2011 14:14
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timmmay: This seems like like giving a Chihuahua steroids... sure it'll be bigger than it was, but it's still just a Chihuahua.

You might get a bit more CPU performance, which may or may not translate to real world performance, but I/O will still slow things down.


The Q6600 is a very solid cpu (remember the Q means quad core) and there are decent gains from overclocking it.  

Most Q6600's can do 8x400 = 3.2ghz (default is 8x266 = 2.4ghz), you need to use a better cooler than the stock one though but with options like the $50 cooler master 212 it's no problem.

Currently the best bang/buck new intel cpu is the i5 2500K, I would go as far as to say if you have a Q6600 or Q9xxx then currently it's not worth upgrading to an i5 2500K as there is not a big enough performance increase. Throw a $50 aftermarket cooler on the Q6600 overclock it and wait for next gen.

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  Reply # 535145 19-Oct-2011 14:15
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I just bought a second-hand E6600 system a month ago, and was able to overclock it from 2.4GHz to 3.0GHz on stock cooling, while reducing temperatures (but I think I was lucky). I'd never overclocked before, but it was much easier than I expected.. The Q6600 seems to just be a quad-core version of this (but the extra cores will increase heat, so it'll be harder for you).

Download CPU-Z and check the memory ratings of all your RAM sticks (DDR2-667, DDR2-800, etc). Remember the lowest one.

Download a program called 'OCCT'. It'll let you test the stability of your overclock. Go into the settings and set the maximum CPU temperature to 60 degrees. Run the automatic 1 hour CPU test beforehand, and check that your system's stable and how high the temperatures go.

Go into the BIOS, set the VCore to ~1.3V (for now), and set your FSB to 311 (2800MHz divided by 9). Set your RAM speed to the highest setting below its rating (If your RAM is DDR2-800, then the DDR2-667 setting should be DDR2-778 by now, so use that). You'll be able to go up to 2.88GHz (FSB 320) on that setting without overclocking your RAM (I used 3GHz (FSB 333), and have my DDR2-800 running at 833).

Go into Windows, open OCCT and run it again. If it's stable (or the temperature reaches 60 degrees), try dropping your VCore a bit to reduce power/heat (I have mine at the lowest setting, and it's stable at 3GHz) or further increasing frequency. If it gives you an error (or your computer crashes), either increase your VCore or reduce the frequency. Once you're happy with your results, run OCCT for 12 hours to double-check.



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  Reply # 535374 19-Oct-2011 22:58
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michaelt: I just bought a second-hand E6600 system a month ago, and was able to overclock it from 2.4GHz to 3.0GHz on stock cooling, while reducing temperatures (but I think I was lucky). I'd never overclocked before, but it was much easier than I expected.. The Q6600 seems to just be a quad-core version of this (but the extra cores will increase heat, so it'll be harder for you).

Download CPU-Z and check the memory ratings of all your RAM sticks (DDR2-667, DDR2-800, etc). Remember the lowest one.

Download a program called 'OCCT'. It'll let you test the stability of your overclock. Go into the settings and set the maximum CPU temperature to 60 degrees. Run the automatic 1 hour CPU test beforehand, and check that your system's stable and how high the temperatures go.

Go into the BIOS, set the VCore to ~1.3V (for now), and set your FSB to 311 (2800MHz divided by 9). Set your RAM speed to the highest setting below its rating (If your RAM is DDR2-800, then the DDR2-667 setting should be DDR2-778 by now, so use that). You'll be able to go up to 2.88GHz (FSB 320) on that setting without overclocking your RAM (I used 3GHz (FSB 333), and have my DDR2-800 running at 833).

Go into Windows, open OCCT and run it again. If it's stable (or the temperature reaches 60 degrees), try dropping your VCore a bit to reduce power/heat (I have mine at the lowest setting, and it's stable at 3GHz) or further increasing frequency. If it gives you an error (or your computer crashes), either increase your VCore or reduce the frequency. Once you're happy with your results, run OCCT for 12 hours to double-check.



So basically all i need to do is modify the Vcore, fsb and ram speed?
This is my memory specs and cpu specs at the moment.



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  Reply # 535394 20-Oct-2011 00:06
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First, select the other Memory Slots in CPU-Z. Make sure they're all the same. It's possible your first RAM stick is DDR2-800, and another is DDR2-667 or 533.

In most BIOS's, if everything's set to automatic then you could just increase the FSB and it should compensate (drop the memory speed, increase VCore) but it's better to do it manually.

So basically, increase the FSB (to your desired speed divided by 9), adjust the memory speed to the highest setting below DDR2-800 (you can try going up to ~DDR2-833 if you really want) and set the VCore to 1.3V to start with. Then test with OCCT.

If it's unstable, increase VCore. If it's stable, try decreasing VCore if you want to (or increase FSB further).

If the temp's too high (over ~60 during a 1-hour OCCT test), drop either VCore (if you can without affecting stability) or both FSB and VCore.

You'll get the hang of it pretty quickly.

As for temp's, anything up to 60 C under load is fine, although it should idle well below that. Anything between 60-75 won't kill it instantly, but will signicantly reduce the lifespan. I think at 75 the Core 2 should automatically throttle down, but I'm not sure.



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  Reply # 536344 22-Oct-2011 00:26
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I have done exactly what you told me. I am now running @2.6Ghz but im slowly going to increase it to 2.8Ghz by small increments as so it can be stable.

Thanks for the help.
P.s Whenever my Cpu is at minimal load the Clock multiplier decreases to 6.0 which puts the clock at around 1.7Ghz. Any reason why it does that? A power saving feature perhaps?



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  Reply # 536345 22-Oct-2011 00:31
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The Q6600 is a very solid cpu (remember the Q means quad core) and there are decent gains from overclocking it.  

Most Q6600's can do 8x400 = 3.2ghz (default is 8x266 = 2.4ghz), you need to use a better cooler than the stock one though but with options like the $50 cooler master 212 it's no problem.

Currently the best bang/buck new intel cpu is the i5 2500K, I would go as far as to say if you have a Q6600 or Q9xxx then currently it's not worth upgrading to an i5 2500K as there is not a big enough performance increase. Throw a $50 aftermarket cooler on the Q6600 overclock it and wait for next gen.


Yes this is a very solid CPU. Yes It can be overclocked up to 3.2Ghz (stable) with the right cooling setup. Main reason for the OC is so it doesnt bottle neck my HD6950 although it probably does not anyway with standard clock.

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  Reply # 536346 22-Oct-2011 00:42
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Yes, the decrease in multipler is a power saving feature. Intel's version is called SpeedStep. You can usually disable it in the BIOS if you want to, but I personally leave it enabled (particularly since overclocked CPU's use more power).

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  Reply # 536348 22-Oct-2011 00:48
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goodboy: 
P.s Whenever my Cpu is at minimal load the Clock multiplier decreases to 6.0 which puts the clock at around 1.7Ghz. Any reason why it does that? A power saving feature perhaps?


Yeah it's a power saving and heat reducing feature, when the cpu is relatively idle it turns down the multiplier.

You can disable it in bios if you want, iirc it's called Speed Step or something like that. 

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  Reply # 536374 22-Oct-2011 10:19
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Manually set Vcore to stock instead of auto. Disable C1E and Speedstep. Lock PCI to 100MHz or is it pci-e (sorry been awhile since oc'n my q6600...either or it won't hurt to lock pci-e or pci).
Set the DRAM ratio to 1:1 while overclocking
Increment FSB by a small amount, leave multiplier at 9. Run Prime95 for 3 or 4 hours. 20 min should give you a relative idea about the stability, do the 3-4 or 24 hrs test once you get to the clocking you want.
If stable, increase FSB by another small amount. If unstable, increase Vcore by a step.
Continue until you reach target, or until temps/Vcore rise to high for liking.

I had mine running at 3.6GHz (been years now since running a q6600). OC'n with top of the line HS/fan for the day, reached 4.0Ghz on air with some creative big house fan help. 4.0 GHz was much easier to do with phase change cooling though.

Q6600 will easily/should do the 2.8GHz pretty easily. Possibly it won't take much of v bump. Just keep an eye on temps if running stock hs/fan.

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