I was trying to OC my Q6600 G0 to 3GHz using 9x333. I set the FSB to 333 and the voltage to 1.285v yet CPU-Z would see it at 1.168v. Set it to a 1:1 memory to FSB ratio (DDR2 667) and the timings and voltage to match the specs. First I had the voltage at 1.2625v and Windows Vista crashed so then raised it to 1.285.

My first question is why when I set the voltage to auto in BIOS CPU-Z sees it correctly but when manualy setting the voltage it sees it way lower than it is(by 0.1v) and that is with speedstep disabled.

Second, does anyone else have a P5K-E mobo that they have OC'ed a Q6600 G0 on and what were your VCore settings and well everything. I can get it to run at 2.7GHz 9x300 with a 1:1 ratio stable but anything else seems to get very choppy when in Windows although it boots fine. Although I doubt I will run it at 3GHz constanly like I run it at 2.7GHz but still it would be nice to be able to.

First: never set any voltage on AUTO: the mb will increase them way too high for you

2- vdroop and C1E are th ecause of voltage variations. On load, vdroop can be important for quads. Use the volts dumpers in your bios to bypass vdroop. Just read the manual and forums for that. CPU-z as of version 1.41 reads the vcore correctly by the way

3- If you want to overclock, begin by putting your vcore to 1.35, safest for who doesn't know what he's doing. If you don't bother reading the guides on how to OC, and you don't lock your voltages and PCI/PCIE frequencies, you'll get some bad surprises.

1.28v is for someone looking to undervolt his CPU to spare electricity bills (there are some topics here on undervolting if you like)

An advice: set your bios on default before hurting something, read the tuts, and try your self some tuning. When you hit the walls with your OC, you can ask more precise questions so people will help you max it more

I read the entire guide and decided to go lower voltage then jump up each time to get stability. I have the CPU Voltage Dampner on and had C1E off to test. Maybe I will set the voltage for the OC I have now. I locked my PCIE frequency but this mobo doesn't have a PCI one to lock which makes me wounder.

I guess its off to the good old testing chambers now. Thanks for the info too.

Well, I see. There are on xtremesystems some pencil mods for the P5K deluxe. On another thread, they state that it is the same for the P5K-E

http://www.xtremesystems.org/forum [...] p?t=147110

It should solve your problems. vmods are safe with pencil, you can remove them with some pure 100% isopropyl alcohol or a tape

Let me know if it works for you

I set the voltage to 1.2125v for my 2.7GHz OC and it boots and reads at 1.1v in CPU-Z. But it is stable as anything. Have never had it crash and thats with it running a game from 3pm till 3pm the next day.

Ill check that for it to see if it works. Thanks for the link.

BTW, I got SpeedFan and its my first time using it. It shows my CPU at 39c with core 1,2,3,4 at 32,30,25,23 respectively. It also shows something called "AUX" that is at an insane 119c. I just wounder if its a part in my PC or if its just nothing.

You have to adjust speed fan for Q6600's. It reads 15c under temp for some reason. Try this link below.

9.Calibrations
http://www.tomshardware.com/forum/ [...] ture-guide

You are on the right track if you read the overclocking stickies. For starters, keep Vcore below 1.3. Ignore voltage droop. Enable the CPU Voltage Damper in the bios. Gently increase FSB, keeping memory frequency near its spec frequency. (e.g., 1066 MHz.).

A good first step is to try a 3GHz overclock (FSB = 333, with multiplier 9). Run Prime 95 to test for stability. If it runs OK, try lowering Vcore until you lose stability, then increase it one step at a time until it runs Prime 95 for at least one hour. BTW, I set PSI freq to 100MHz., Vmem = memory stick spec voltage.

Use SpeedFan to monitor the temperature difference between idling and CPUs 100% busy. Try to keep this under 25 degrees C.

As your experience improves, you will be able to overclock the Q6600 quite a bit higher than 3GHz.

And you can disable auxilary reading as it is erronus

I thought the QUX was wrong. If something was that hot it wouldn't run. I was checking SpeedFan vs the BIOS and the total CPU temp matches and I have a temp sensor on the base of my heatsink that shows the same temp as both SpeedFan and my BIOS. Well its a bit hotter.

I think Ill stay at 2.7GHz for now untill I can OC my video card. Have to get a 6 to 8 pin converter(HD2900Pro) since that will unlock Overdrive. Then I will work on my max CPU/GPU power.

dude , 1.26 ? really ? if you want a stable oc for q6600 at 3 on air cooling ( I'm presuming) then i'd suggest 1.36-1.39.

I would agree Mosdapwn but not every CPU is the same. Some require less voltage in order to clock at 3GHz. Some require more. Its all CPU dependant and how well your little piece of silicon developed.

I hope I can get mine to run at 1.26v. That would be nice. But I doubt it would run at anything lower than 1.35v

I am running my Q6600 at 3015mhz on 1.275V. It has been stressed for 10 hours without problem. Reducing the voltage from here resulted in windows crashing within 5 minutes of Prime95 stress test

Mine was sitting at 1.28v with 333x9 on air.

Ran Prime stable for 8 hours and that's good enough for me. Going to attempt to lower it today and see what happens.

my q6600 does 9x333 @ 1.2625V (BIOS)... each chip is different.

my Q6600 G0 runs at 333x9 vcore 1.3250 but its runs good. or i can leave it run on stock voltage. zalman 9500 temps never go abovr 43c full load prime 95 ran for 12 hours.