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Q6600 to 3.6ghz At least.

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December 19, 2011 4:57:08 PM

Hello!
I want to get the absolute best performance out of this processor, so I don't have to upgrade for another year.

I want 3.6ghz, at least to compete with the more CPU intensive games like RedOrchestra, GTA, Battlefield series, TES:Skyrim etc.

Specs:
Core 2 Quad 6600: 2.4ghz stock.
Asus P5N-D Motherboard (Extremely finicky with OCing, but I'll read the stickies for help)
GTX570 (standard)

Some background:
I oc'd to 3.0ghz
This passed the intel burn test, but BSOD during heavy crysis combat (Doesn't make sense) I'm assuming it was a heating issue, but still WTF.

AT 3.0 I was getting 70c under load.
I have an AWFUL raidmax heatsink that was preinstalled when the system was first built. With intel burntest, it gets to 75c, which is BAD, I know.

So, my question is. What would be the best way to cool this ancient quad core without breaking the bank, I have two in mind:
1)http://www.newegg.com/Product/Product.aspx?Item=N82E168...
2)http://www.newegg.com/Product/Product.aspx?Item=N82E168...

More about : q6600 6ghz

a b K Overclocking
December 19, 2011 5:22:53 PM

you can't get 3.6ghz anyway.
December 19, 2011 5:32:21 PM

1. You will never hit 3.6 GHz with that board and will be lucky to hit 3.0 - 3.2 GHz it is not a great oc'er for quads but is great dual's. I hit 3.6 GHz @ 1.34v stable 24/7 with a Gigabyte P45-UD3R max temps 52c under load (G0 stepping). I also had the ASUS P5N-D and managed 3.2 with a Corsair H50.

2. I wouldn't spend more than $30 on a cooling solution socket 775 is DEAD.

3. Try this... http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Related resources
a c 197 K Overclocking
December 19, 2011 5:46:40 PM

I do not know if you will be able to get to 3.6 GHz will any kind of stability. The nForce 700 chipset is a definite improvement over the nForce 600. But past 3.3 GHz, so much depends on your particular CPU chip.

overclocking nforce boards:
This should be your first stop.
Core2 Overclocking Guide (generic guide based on an Asus motherboard)
http://www.tomshardware.co.uk/forum/259899-11-core-over...

For your motherboard (BIOS's tend to be different):
http://www.pcstats.com/articleview.cfm?articleid=2104&p...
Look at the second set of screen shots (the top one labeled FSB and Memory Config).

Set memory to Linked. Once you do that, you should see Memory speed drop to 533 MHz.

The FSB speed is 1066 MHz. That is really the stock FSB clock. Speed is 1/4 of that - 266 MHz. The nForce 600/700 BIOS is a little strange. You adjust the FSB clock, not the FSB freq.

The screen shot for the voltages show their maximum values. Do not go that high or you will fry something.

So. Leave your memory timing on Auto. Set memory to Linked. For 3.0 GHz, FSB speed is 333 MHz, FSB clock is 1333 MHz, and memory clock will be 667 MHz. For 3.3 GHz, FSB speed is 367 MHz, FSB clock is 1466 MHz, and memory clock will be 733 MHz.

These combinations will give you a 1:1 FSB:RAM ratio and generally the best stability. Running the RAM faster gives little extra performance in a Core2 system.

Jump straight to 3.0 GHz. You will be forever nudging the FSB freq up 5 or 10 MHz at a time. You should be able to reach 3.3 GHz. You may be able to reach 3.6 GHz depending on your individual CPU, cooler, and case..

On my eVGA 680i board, running the memory Linked gave me a fair amount of instability, so I ran Unlinked and manually entered memory settings to let me run 1:1.

Keep the CPU core voltage under 1.50 volts and your load temps under 70 C. Do not exceed 2.2 volts RAM voltage.
December 19, 2011 5:51:40 PM

I have to agree with the other guys. The Q6600 does not over clock well and the asus P5N-D does not overclock well either. I have the same board and started with the same chip. On mine i could never get past 2.8 even with a huge zalman. Temps were always fine voltage was ok still it would not work. I even pencil moded the voltage regulator on my board and polished the northbridge/PCIe bridge heat sink. I tried a bunch of random fixes and bios tweaks still could not get it stable.

I ended up catching a Q9650 on sale. That chip over clocks so much better. I was able to get it up to 3.8 with no voltage tweaks at all. I just cranked the FSB.

PS my board is now 4 years old and about a year ago the onboard network card messed up. Now the USB ports are all wonky. My advice is if you want that board to last dont mess with it.
a b K Overclocking
December 19, 2011 5:57:39 PM

Perhaps I was very lucky but I was able to OC my Q6600 to 3.8 on air with 1.44 volts on air using an ASUS P5Q Pro motherboard and a Xigmatex HDT s1283 HS/F. Load temps averaged 63c and got to about 71 highest. If I recall Correctly, it was a G0 CPU and i believe those are decent overclockers.
a c 330 K Overclocking
December 19, 2011 6:10:58 PM

I'm currently running a Q6600 and can easily run it at 3.4...3.6 if you tweak it, but difficult to do. I'm running a 790i board- the 680/690i boards were far less stable (680's being worse than 690's). At 800-1000mhz overclock, you can hardly call that a poor overclock on a chip. There are some guys who hit 4.0ghz, but stability gets to be an issue with the amount of volts required for that speed. Still- it really depends on your chip, VID and ability of your board to create a stable multiplier that works for your specific chip. It isn't impossible, by an means.
December 19, 2011 9:45:42 PM

jsc said:
I do not know if you will be able to get to 3.6 GHz will any kind of stability. The nForce 700 chipset is a definite improvement over the nForce 600. But past 3.3 GHz, so much depends on your particular CPU chip.

overclocking nforce boards:
This should be your first stop.
Core2 Overclocking Guide (generic guide based on an Asus motherboard)
http://www.tomshardware.co.uk/forum/259899-11-core-over...

For your motherboard (BIOS's tend to be different):
http://www.pcstats.com/articleview.cfm?articleid=2104&p...
Look at the second set of screen shots (the top one labeled FSB and Memory Config).

Set memory to Linked. Once you do that, you should see Memory speed drop to 533 MHz.

The FSB speed is 1066 MHz. That is really the stock FSB clock. Speed is 1/4 of that - 266 MHz. The nForce 600/700 BIOS is a little strange. You adjust the FSB clock, not the FSB freq.

The screen shot for the voltages show their maximum values. Do not go that high or you will fry something.

So. Leave your memory timing on Auto. Set memory to Linked. For 3.0 GHz, FSB speed is 333 MHz, FSB clock is 1333 MHz, and memory clock will be 667 MHz. For 3.3 GHz, FSB speed is 367 MHz, FSB clock is 1466 MHz, and memory clock will be 733 MHz.

These combinations will give you a 1:1 FSB:RAM ratio and generally the best stability. Running the RAM faster gives little extra performance in a Core2 system.

Jump straight to 3.0 GHz. You will be forever nudging the FSB freq up 5 or 10 MHz at a time. You should be able to reach 3.3 GHz. You may be able to reach 3.6 GHz depending on your individual CPU, cooler, and case..

On my eVGA 680i board, running the memory Linked gave me a fair amount of instability, so I ran Unlinked and manually entered memory settings to let me run 1:1.

Keep the CPU core voltage under 1.50 volts and your load temps under 70 C. Do not exceed 2.2 volts RAM voltage.


Thank you for the detailed explanation. I'm going for 3.2, stable and no more. Maybe 3.4 in the future.

I tried those settings but, still PRIME95 shutdown my computer within 30 seconds. I will keep trying. I'll keep this update until I've found a stable overclock. Thank you everyone.
a b K Overclocking
December 19, 2011 11:18:44 PM

i have the p5n-d. plenty of people are able to push that cpu to 3.6 on this board, however, i cant get past 3.24ghz. not because of a cpu limitation, but i cant get the fsb past 1450 without a lot of HT voltage. many others are able to get 1600fsb with only a small voltage increase, i dont know what the problem is but im stuck at 1450.
a c 330 K Overclocking
December 19, 2011 11:32:03 PM

You might also need to bump your RAM voltages as well if you have to run a linked multiplier to FSB. (My 790i can run these unlinked, but not sure on the Intel chipsets...my older ASUS Intel chip could not).
December 19, 2011 11:46:17 PM

rubix_1011 said:
You might also need to bump your RAM voltages as well if you have to run a linked multiplier to FSB. (My 790i can run these unlinked, but not sure on the Intel chipsets...my older ASUS Intel chip could not).

Reply to you: I can run unlinked, but should I bump the voltages?

UPDATE:
Test #1
FSB1200
Vcore 1.35
HT1.32
NB1.32
SB.150
2.7ghz
Passed Intel Burn In Test with Max Load 65C
Test #2
FSB1340
Same Voltages
3.0ghz
Passed Intel Burn In Test with Max Load 70C

I want to get to at least 3.2, which voltages should I boost?


December 20, 2011 12:14:14 PM

I just looked my Q6600 which is now underclocked in my multimedia pc is a B0. Perhaps that is why I could not get past 2.8.
a b K Overclocking
December 20, 2011 2:07:01 PM

bucknutty said:
I just looked my Q6600 which is now underclocked in my multimedia pc is a B0. Perhaps that is why I could not get past 2.8.


Agreed, B0 is known to be a terrible overclocker. G0 is the Q6600 you want for overclocking.
a c 330 K Overclocking
December 20, 2011 2:12:11 PM

Yes, this is quite correct.
December 20, 2011 4:36:29 PM

I have G0 stepping, so should I just keep pushing it?
My main questions are listed here:
-Once I get above 3.0, I get PC shutdowns and BSODs,
is this too much voltage, or not enough?
-What should I increase incrementallly, and which first: NB, SB, HT, or Vcore?
-Lastly, would a new motherboard and new cooling be worth it to get this baby to 4.0, or should I just save up for a new rig?

Current Rig:
P5N-D(obviously)
Q6600
Corsair 650TX
GTX570
4gb ADATA ram
Hitachi Motherboard
Apevia Xcruiser Mid-sized Case (1x120mm,3x70 or 60mm)


You guys have been a great help so far! Thank you.
a b K Overclocking
December 20, 2011 4:47:54 PM

Hunt down a better board, it isn't worth it busting your back side over a crappy board like this. One is that the power vrm can't handle the large loads imposed by a overclocked quad. Second you might run into fsb limitations as seen on many 775 boards. I suggest a decent quality P45 or x48 board if you can find them if all else a 780i board. I know a 780i board can handle these as I own one. People have gone to 4ghz on these boards back when they were all the rage. Never settle for low end or even mid range boards when overclocking is important to you. Last thing one needs is a board that degrades over time and dies.
December 20, 2011 5:20:33 PM

If you run into VRM issues where the v core goes down drastically while under load. Google VRM Pencil Mod P5N-D. My v core is now rock solid at whatever I set it at in the bios. I am now running my p5n-d with a q9650 at 3.8 24 hours a day.

Temps get into the 60s even 70s when folding @home on all cores but that is expectedwith the q9650. I used stick on heat sinks on all the board mosfets and a big zalman CNPS9900MAX.

Also keep in mind that under that north bridge cooler there is also the PCI-e 16x-8x bridge chip pos. If your running multiple PCIe cards that thing gets hot as balls.
a b K Overclocking
December 20, 2011 5:40:56 PM

friend don't increase your headache on this your cpu is pretty old stuff you can't be able to hit 3.6ghz or more people who have q6600 and saying "i'm overclock it to 3.6ghz or 4.0ghz'' so i'm 99% sure some of them was lie.a very small amount of people were lucky to hit that target but they also used an decent coolers+motherboards which are pretty expensive too.

Leave it might be it fry up your cpu.
a c 330 K Overclocking
December 20, 2011 5:46:54 PM

I've hit 3.6 on my Q6600 using 780i and 790i EVGA boards. I also had a P5 ASUS board which allowed this speed, but with a locked FSB/multiplier. Hitting 4ghz with this chip is possible, but not long term sustainable.
a b K Overclocking
December 20, 2011 5:50:45 PM

shall be you would be the lucky one to hit that otherwise it is not possible to everyone.
December 20, 2011 6:56:29 PM

Dont spend money on a 775 computer. Save the money for a new ivy bridge. 50 bucks is 10% of the 500 you need to get a i5 3750k new board and new ram.
a b K Overclocking
December 20, 2011 7:12:37 PM

xtreme5 said:
shall be you would be the lucky one to hit that otherwise it is not possible to everyone.

no, if you have a good board all q6600's can get to 3.5ghz. My problem is my motherboard FSB is not stable. I have the northbridge and HT link at 1.44 and 1.5v and cant squeeze any more without risking damage. my board is the limit, but many others dont have the same issue as me........i cant figure it out. i can get my fsb a lot further with a different cpu though (q8200), but with overall lower performance due to it's low multiplier.
a b K Overclocking
December 21, 2011 11:34:46 AM

stillmatic, i cannot see what is in the cart in that link you posted but if you're upgrading your mobo/ram/cpu, please tell me you're not ordering from best buy...

Also, your Corsair 650TX will hold up
!