Need help Q6600 BSOD past 2.8ghz

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crsdR

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Jan 13, 2015
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Hi guys,

I can't overclock my Q6600 pass 2.8 ghz I am getting BSOD.

My pc specs are :

POWER SUPPLY Fortron Saga 450W

CPU Q6600 2.8ghz G0

MB GigaByte P35-DS3 P35/ddr2/GLan/Sata2/PCI-E s.775

RAM: 4x1 GB 800mhz

GPU: GTX 460 SE 1gb

my cpu current settings are

CPU clock: ratio x9
CPU frequency: 320
memory multiplier: 2.50
Vcore 1.325v

 
Solution
sportsfanboy
It's been a awhile since i overclocked a q6600, so i'm trying to remember,lol

First... Most q6600 could do near 3.0ghz on stock voltage, So I don't think raising it to 1.4 or higher is going to help at low frequency under 3.6ghz.

I would start by clearing the cmos jmpers, and starting fresh

Next set ram voltage and timing manually to factory specs, but set the ram frequncy to the lowest possible ratio(slowest speed), you can raise it later after your cpu overclock is where you want it and stable.

now try raising the fsb to somewhere around 333 with maybe 1.35vcore, you can lower it after if you're stable, or you can raise the fsb for higher frequency.

You may or may not need to give the nb a bump in voltage as the fsb frequency...
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jimhood82

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Aug 23, 2009
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After looking for a bit, it seems like you are dealing with a limitation of power. The FSP Saga 450 appears to be good for about 285w on the 12V rails. The CPU stock is a 105W part. The GPU is a 150W part. You are already skirting the upper limits of the PSU at stock clocks @ 255W without the accessories. Overclocking needs a lot of power, and you will need a power supply that can deliver it.
 
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jimhood82

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Just be sure it has plenty of power on the 12V rails. I always suggest Antec and Corsair psu's. Can't really go wrong with them. Though a lot of the EVGA units have been fairly cheap lately, and hold up quite well.
 
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CompuTronix

CompuTronix

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Nov 13, 2006
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crsdR,

In my experiences with overclocking the Q6600 G0, a 450 Watt PSU is not a limiting factor.

Q6600 G0 is 95 Watts TDP.
Q6600 B3 is 105 Watts TDP.

Intel's website previously differentiated between the G0 and the B3, but currently does not.

Q6600 processors are 2.4GHz at stock settings, however, many Q6600 G0 processors will overclock to 3.6 GHz at 1.5 Vcore.

You need to increase Vcore.

Make sure that you have disabled Spread Spectrum settings in BIOS. Maximum recommended Vcore is 1.500, so your current setting at 1.325 means that you will need to increase Vcore to continue increasing your clock speed.

CT :sol:
 
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FunkMeister

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Dec 27, 2014
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I've just spend the last few weeks building up and playing around with a new system built around an old Q6600, I've got a stable overclock at 3.4 ghz. Whist experimenting with different settings I've found 1.325v should be plenty for 2.8 ghz, you should be able to reach 3.2 ghz easily with that voltage.

Please someone correct me if I'm wrong but the fastest bus speed on your motherboard using the P35 chipset is 333mhz (x4) so you're pretty close at 320mhz. I've found I can't get past 390 mhz on mine which has the P45 rated at 400mhz. I'm new to overlocking so don't take my word as law, hopefully someone with better insight might chip in.
 
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FunkMeister

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Dec 27, 2014
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Actually I've just spotted what looks like a mistake in your bios settings. I think you've got your memory multiplier too high. Set the frequency latch to 333mhz (2:3 ratio) then set the memory multiplier to 2.00B. That should bring your ram down to an acceptable frequency.



 
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crsdR

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Jan 13, 2015
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Okay , ty guys. I will try your suggestions and see what will happen :D

Btw I don't see Frequency Latch and Spread Spectrum in the settings, could you explain me why ?

10921901_10205538513483303_373126809_n.jpg
 
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jimhood82

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He is referring to the memory multiplier. Depending on the ram, it may need to drop back. I actually expected you were on 800Mhz ram. Please double check the ram ratings and see how they match up (meaning check the label).
 
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sportsfanboy

sportsfanboy

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Mar 16, 2008
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It's been a awhile since i overclocked a q6600, so i'm trying to remember,lol

First... Most q6600 could do near 3.0ghz on stock voltage, So I don't think raising it to 1.4 or higher is going to help at low frequency under 3.6ghz.

I would start by clearing the cmos jmpers, and starting fresh

Next set ram voltage and timing manually to factory specs, but set the ram frequncy to the lowest possible ratio(slowest speed), you can raise it later after your cpu overclock is where you want it and stable.

now try raising the fsb to somewhere around 333 with maybe 1.35vcore, you can lower it after if you're stable, or you can raise the fsb for higher frequency.

You may or may not need to give the nb a bump in voltage as the fsb frequency rises.

 
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Solution
F

FunkMeister

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Dec 27, 2014
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Actually I just built up a machine for gaming using an old Q6600 and there's a noticeable difference between 3.4 and 3.2ghz. I've found 3.4 ghz is optimum speed to keep up with my modern graphics card without generating too much heat. I have a Nepton 140XL water cooler on it, temps top out at 65 deg under heavy load during an extended gaming session. I've found some stable settings at 3.51 ghz but it pushes a little too close to 70 deg when testing so I leave it 3.4 ghz.

Anyway, 3.4 ghz is definitely worth pursuing. I'll share my settings with you later today,after I've had a chance to look at the bios. I'm using 1066 mhz ram so they may be irrelevant to you but at least you'll get some idea of the voltages.
 
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FunkMeister

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Dec 27, 2014
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Ok, sorry for the delay, here's my settings if you're still interested. I'm only including the important ones as I'm reading off the bios screen so I can give you the voltages I put in as My EP45 DS3P has heavy vDroop protection, so the actual settings when read from monitoring apps operating from windows are a lot lower.

The voltage settings are probably the most useful info here as the CPU Host frequency, DRAM frequency latch & memory multiplier are effected by my ram being rated at 1066 mhz.

Make sure you have a good CPU cooler and your case has a good throughput of air across the motherboard.

Q6600 @ 3.4 ghz

--- Clock Chip Control ----

Multiplier : x9

CPU Host Frequency: 378

PCI Express Frequency: 100mhz (def. set this so you don't damage your graphics card)


-----DRAM Performance Control -----

Frequency latch: 266 mhz

System Memory Multiplier: 2.50A
(gives me a ram speed of 954mhz)

ram timings left at manufacturer's settings - 5-5-5-15


--- Motherboard Voltage Control ----

CPU Vcore: 1.47500 v (HWMonitor says: 1.424 v)
CPU Termination: 1.380 v
CPU PLL: 1.380 v

MCH Core: 1.500 v
ICH I/O: 1.500 v (set this manually to the recommended setting so they don't get increased automatically)
ICH Core: 1.100 v (set this manually to the recommended setting so they don't get increased automatically)

DRAM voltage: 2.000 v (The manufacturer recommends 2.1 v @ 1066 mhz 5-5-5-15 so I turned it down 0.1 v)

Hope this helps.
 
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