Overclocking P35/Q6600 question

You just need to set your memory bus speed to 1/2 the FSB datarate; this will result in the FSB and memory bus throughput running in a 1:1 ratio. So, for a FSB throughput of 1066MHz (266x4), set the memory bus speed to DDR2-667 (1066/2). Your DDR2-800 RAM should thus be fine for FSBs up to 1600MHz datarate.

PCI express form auto to 100
System memory multiplier from auto to 2. I believe for Gigabyte. 2 or .2? whatever it shows up as.
FSB to 333 atleast.

I have the same motherboard, cpu (same vid) and psu as yours. I am running at 3.2 g. Here are a few things i want you to do. First of all press Ctrl+F1 from the main screen. then go to the page you show me. Then do the followings.

1. Set your cpu frequency to 3.2 G ( if that is what you want to do) or any frequency you want to achieve.
2.Set your pci E frequency to 100.
3. Set your SPD to 2.
4. Set system voltage to manual.
5. Set your cpu voltage to 1.4 in bios. It will be about 1.344 in windows due to Vdroop.
6. Save and exit.

That is it. It is prime stable at 3.2 G with the above settings. It is very likely that yours will also be stable. But, it might give different results. At least, you have got some sorts of guidline. If you want to reach to 3.6 , set your net voltage to 1.5 ( i.e voltage in windows). But, i am happy with what i have got.

Also, there are a couple of settings you need to disable in second items from the main menu. If you can give me a snapshot, i can tell you what you should disable for stable oc.

Have fun.

Ok. Here are the settings:

1. set first boot device to your hard drive.
2. set C1E to disable.
3 set EIST to diable.
4.set virtualizaiton technology to disable.
5. set full screen logo to disable.
6. set int display to pci ex.
7. save and exit.

Then, run the prime test. watch the system temperature closely while running prime test. it should never exceed 71C. Mine is around 60 C after hours of prime test. If you exceed the 71 C limit, readjust your cooling solutions or reduce your vcore. In my case, i have to set it to 1.4 v in bios to get a stable system. if the system is stable , you might want to turn the item 2 on.

Good luck.

what are your settings. what frequency are you at now? what is your idle temperature. what is your Ram speed and settings.

GUIDE: Overclocking On P35-DS3L

Heh, no problem. Happens to the best of us

The core voltage setting of 1.4 may not be required, I am running my Q6600 G0 at 3.2GHz on auto voltage setting, which according to CPU-Z ver 1.44.2 is 1.248V. I also left my ram voltage setting on auto, which in my case comes out 1.8V. See sig for other system details.

How stable is your system? is 1.248 V recorded during the prime test? Mine is not stable at that voltage. 1.248 V is too good to be true or stable.

Not necessarily so. Each CPU mobo combination is unique, and other system components also factor into the equation. The EP35-DS3R ver 2.1 seems to work quite nicely at normal voltage settings for my Q6600 Stepping B Revision G0. No problems with stability whatsoever under Vista 64 SP1, Cat 8.4. I am using 8X CPU multiplier with 400FSB setting,
Memory 1:1 FSBRAM 5,5,5,18 2T. Others posters here have had the same experience leaving the system voltage (CPU Core) setting at normal.

Your experience may vary.

Well.. i understand that every cpu is different. but, my question is How stable is the system.

I did exactly that, I set the multiplier to 8 and the FSB to 400. I also set the voltage to auto/normal. Prime is running fine now without crashes or anything in the last 10-15 minutes. Idled at around 30C and running 61C or below at 100% on all 4. I have a feeling it was a problem with the frequencies.

Use the cpuz for cpu voltage. I usually open the following applicaitons during the test.

CPUZ ( to check the voltage deviation)
CORETEMP ( to check the cpu temperature)
Task Manager ( to ensure all cores are loading up)

I have been to that route ( lower multiplier and higher FSB). But, i prefer to use 9* mulitiplier. Anyway.. it is your call.

But, if you push FSB , like in your case, you need to increase the northbridge and southbridge voltage. That is probably why you failed the prime test. Also, Increase the memory voltage a little bit. Let's say 1.9 V. It is still within the spec. So do not worry about it.

I prefer not to use "Auto" settings because you do not know where you are at. As far as cpu voltage is concerned, you are safe to set up to 1.5 V provided that you do not exceed the 71C limit. As long as you are within the limit, do not be afraid to increase the voltage. You are now finding the stable point for you system. That does not mean you have to stick to higher voltage all the time. Once you have reached to the stable poiint, you can reduce the voltage.

A few recaps: Watch temperature closely during prime test. Reduce cpu frequency to 3.0 and then run the prime test. Take notes of your settings on a sheet of paper.

It takes time at first , but you can easily hit 3.2. Do not be upset. keep trying.

It improves speed if you are running multiple operating systems at the same time.

rg - just remember that "auto" setting in the BIOS does NOT mean it's running at the VID value unless you've also turned OFF the "loadline calibration" setting in the BIOS.

I have an EP35-DS3P and Q6600 running at 3.6 GHz. Here's my settings:

CPU Clock Ratio [X9]
Clock Control [Enabled]
CPU Host Freq [400]
System Memory Mult [2.00]
DRAM Timing Select [Manual]
Memory Timing set to 4-4-4-12
System Voltage Control [Manual]
DDR2 Overvolt [+.40 v]
Crucial memory specs
FSB Overvolt [+0.20 v]
MCH Overvolt [+0.100 v]
Needed these two settings to run at 3.6 GHz
CPU Voltage [1.450 v] Droops to 1.40 volts

System is 24 hours Prime95 stable. With a TRUE/S-FLEX HSF in an Antec 900 case, maximum load core temps are 65 C.

Running at 3.3 GHz, I need to set the CPU voltage to 1.30 volts. I can leave the FSB and MCH voltages stock. At 3.3 GHz, maximum load core temps are 55 C.

Well, I've figure out that I need a very high voltage for any combination of multiplier/fsb/timing/other numbers that I apply. For example, just to hit 3.2 I need a minimum of ~1.465 volts and a minimum of ~1.51 volts to hit 3.3. Not sure if I'm overlooking something, because I don't think I am, but I've been OCing this for about a week and those are my conclusions. Right now I'm running a 8x400, 1.408 (net) CPU voltage, +0.1 FSB voltage, +0.1 MCH, and +0.1 DDR2 overvolt at 5-5-5-15 with the graphics card core clock OCed to 721 MHz and the memory clock OCed to 972 MHz. I get around 14070 in 3DMark06 and the 100% load temps stay under the low 60s. I guess my CPU just runs a little hotter than most, that's what I'm assuming.