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Problems Overclocking Q6600

post #1 of 12
Thread Starter 
Hey Everybody,

So I have had a Q6600 for about a year now, and recently I decided to start over clocking it. And everything goes fine until I pass about 2.7ghz. Then I can not even get my computer to fully boot up. As I raise my vcore voltage it boots up a little farther but never makes it fully in. My goal is 3 ghz. The weird thing is I just built my friend a new computer same cpu, just a different mobo and his overclocked to 3 ghz like a charm.

I got my vcore voltage all the way up to 1.5v in bios but it was only registering at about 1.4v. Looking around this seems alot higher then other people have had to raise theres to. CPU temp is not the problem because in bios it is never running hotter then 40C.

Am I missing something? are there other voltages I should raise to?

Q6600 G0 Step
ASUS P5N32-E SLI
4 gig ddr2 800mhz
850 watt PS
2x8800gts 320mb
post #2 of 12
wow. it should not be that high to get to 3.0 ghz. i have a 780i and q6600 G0 and had to put it at 1.48 in BIOS to get to 3.6ghz, and only 1.3625 to get to 3.2. What are your other voltages? Here are mine for 3.4
FSB 1.4v
Nforce SPP 1.4v
Nforce MCP 1.525v
HT Nforce SPP 1.25v

FSB 1525. Post your other voltages, when you have the chance.

Take a look at this guide, it should help you:

http://www.overclock.net/intel-mothe...ing-guide.html
Edited by Mmansueto - 5/13/08 at 12:50pm
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post #3 of 12
Thread Starter 
Thanks for the quick reply, I cant post them now because I am not around my computer but I will post them later.

Edit: actually I haven't even messed with the others, they are all on auto
post #4 of 12
Quote:
Originally Posted by cougarbskball View Post
Thanks for the quick reply, I cant post them now because I am not around my computer but I will post them later.

Edit: actually I haven't even messed with the others, they are all on auto
When you can, read up on the link i sent you. The user Robilar, also made the guide for the 780i, which i used to get my Q6600 overclocked.
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post #5 of 12
Thread Starter 
kk actually reading through it now thanks for the quick help ^^
post #6 of 12
Try and relax the RAM timings if all else fails. Actually you could try this first when o/c-ing so that you exclude the possibility RAM is causing the problem. Or since you have 800mhz ram drop it to 667Mhz.
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post #7 of 12
What yannis said. Try dropping the ram down to 667mhz and then upping your FSB to 1333. Should boot with stock volts.
post #8 of 12
You will find it difficult to OC on the ASUS 680i motherboard with a quad.

3.0GHz-3.2GHz will probably be your limit. Its not just the FSB Hole at play here, it is the GTL REF voltage. The ASUS 680i motherboards struggle to OC the quad core. The problem is a hardware issue. The ASUS 680i motherboards do not follow the NVIDIA reference design, while they are great overclockers with the dual cores, they are not in any way good overclockers with the quad cores. This is due to the GTL voltage supplied to the CPU. The rev A1 680i boards released by NVIDIA (rebadged by EVGA, XFX and BFG) fixes this issue. Unfortunately ASUS will not do anything about it. So this is a hardware issue that will never be fixed by bios updates.

Here is some documentation:
Vr-Zone A1 revision

There is a way to modify the board to compensate for this:
Vr-Zone Ketsfield mod





I dont recommend the mod at all. But it does help illustrate the issue.
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post #9 of 12
Yeah, this is an EXTREMELY difficult board to OC a Q6600 with (personal experience talking), and let me say from the start, unless you're running the 1203 BIOS, you are wasting your time. That being said, I'm running at a solid 3 GHz without any problem, but if you can get to the 1368 FSB, that will give you the most memory bandwidth within that bootstrap.. I unfortunately can't stay stable up there at any voltage so I'm stuck in 1333 anti-glory =/

*EDIT*: Pencil mod def. helped my v-droop issue, but I didn't make any real gains in OC'ing
Edited by FearMeansControl - 5/14/08 at 12:00am
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post #10 of 12
You will not get much higher than 3.3Ghz on a Q6600 with the P5N32-E SLi.

I recommend that you update your motherboard BIOS using the motherboard's built in EZflash feature to the latest 1404, which can be found on Asus's support site. Once you have done that you should be able to raise the FSB straight to 1333Mhz for 3.0Ghz but you'll also have to set your RAM to linked and sync mode so that it runs at the same speed as your CPU. This is to alleviate strain from the MCH.
Edited by t4ct1c47 - 5/14/08 at 4:33am
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