Problem with overclocking Q6600

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rogigor

rogigor

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Oct 15, 2009
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Hi

I have a problem with overclocking my q6600. I can get stable 3,0Ghz with default voltges but I want more. When I set 3,4Ghz (380x9) with DDRAM Speed 1:1.00 and voltages:

CPU Core Voltage - 1,4800
DDR Voltage - 2.1V
CPU VTT Voltaeg 1.2
ICH 1,50
MCH 1,25
CPU GTLREF - 63,8%

I still get errors while running Prime95. The "Fatal error" occurs almost instantly (or after 3-4secconds)

What voltages would you recommend to set?

My Bios looks like this:




My rig:

Abit IP35-3
2Gb ram 800mhz 4-4-4-12 and 1gb 5-5-5-15
Chieftec 450w
Cooling - Scythe Mugen 2



EDIT:

I set

CPU Core Voltage - 1,5200
DDR Voltage - 2.0V
CPU VTT Voltaeg 1.2375
ICH 1,60
MCH 1,33
CPU GTLREF - 67%

Ram 5-5-5-15

And I always almost intantly get

FATAL ERROR: Rounding was 8.796093022e+012, expected less than 0.4
Hardware failure detected, consult stress.txt file.

at worker 2.
 
I suspect that your problem could be tied to your mixed memory. Try pulling the slower module. If that works, put it back in, set the timing to 6-6-6-18, set the RAM voltage to 2.2 volts, and see what happens.
 
Ok, I put the 1gb module and it SEEMED to work fine at 3.2ghz. I mean i left everything default and only bumped a little bit core voltage and it didn't crash at the beginning at it used to.

Then I put this module back again and set timings to 6-6-6-18 and ram voltage to 2.2. My computer wouldn't event start.

Now I'm testing 3,2Ghz at these settings

timings 5-5-5-15 at 1:1,0

CPU Core Voltage - 1,34
DDR Voltage - 2.1V
CPU VTT Voltage 1.2375
ICH 1,5
MCH 1,33
CPU GTLREF - 67%

At least it's not crashing at the very beginning but i have to test it for a couple of hours. Anyway I will want to get to 3,4 or even 3,6 - what settings would you recommend? And do you think that replacing this 1gb cl5 to another cl4 would change anything?
 
Failed. I pulled the slower modul away and set:

3,2ghz

Timings - default

CPU Core Voltage - 1,36
DDR Voltage - 2.1V
CPU VTT Voltage 1.2375
ICH 1,5
MCH 1,33
CPU GTLREF - 67%

And had:

FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.

Please help cause I don't know what to do...
 
Ok. I set everythink like above except:

3.0Ghz
Vtt - ~1,3
MCH - 1,41

And Core 2 failed after ~1hour 20mins giving me the same error. I've played games and stuff and all seems to be stable. Is it normal that sometimes one core fails but it won't affect the system itself? I mean not always my CPU is on full load for 1h...

(btw the seccond core failed after almost exact time with these settings but with 3,2Ghz)
 
Your issue certainly seems to be with the memory. The question now is whether its worth it to you to buy a good set of DDR2, or just use the computer at 3.0GHz until you can get something better. You might even want to just run the 2GB stick(s) and try overclocking to 3.2-3.4 with just it.
 
I'm running with only two stickcs (I pulled away this 1gb knigston stick and left 2x1024 Patriot LLK 800 CL4). I runned memtest for all night and had no errors.
 
3,0ghz (333x9)
Timings - default

2x1024 Patriot LLK 80Mhz, CL4

FSB:RAM 1:1

CPU Core Voltage - 1,36
DDR Voltage - 2.1V
CPU VTT Voltage 1.3
ICH 1,5
MCH 1,41
CPU GTLREF - 67%
(second worker failed after ~1h20min)


But a weird thing - from what I remember with the same fsb but all voltages at defaults, it lasted 3h.... Got to check it again. So do you still think it's my RAM ?
 
Try the more normal 3.2GHz OC. 400MHz * 8 multiplier, with the 1:1 memory ratio like your using. Leave the memory at 2.1v, but set the timings down to 5-5-5-15 or 18. You should also probably bump the Vcore up to 1.4. I thought you had it at 1.45, but I guess not.
 
Ok. I will try with the settings you suggested. MCH leave at 1,41 and VTT Voltage at 1.3 ?

Oh, and should I disable this power saving options like C1E and EIST or it doesn't matter?
 
I bumbed Core Voltage to 1,44, VTT to 1.2375 and MCH to 1.29 and it failed almost instantly.

Is it something wrong with the CPU or Motherboard? Or maybe, even memtest didn't show any errors, it's RAM ?
 
Why did the VTT and MCH voltages change? Those are both lower then you reported before. If you bump the Vcore up to 1.45, and it fails even faster, whats the CPU cooler your using? What temps are you getting?
 
I'm using Scythe Mugen 2 - temps on full load are max 67 with bumped up core voltage. I'll try with higher VTT and MCH later.

Anyway - I set everything to defaults only fsb 375*8 - 3ghz (without bumping up voltages) and it worked stable in prime95 for 2h. After 2hours I shut it down because I'll probably never have all cores on full load for that long. Temps were from 37-60

I'll try later 3,2Ghz with higher Core Voltage, VTT, MCH and ram and let you know how it worked.
 
Ok. A little update. I set:

CPU Core Voltage - 1,36
DDR Voltage - 2.2V
CPU VTT Voltaeg 1.3
ICH 1,50
MCH 1,41
CPU GTLREF - 67%

And prime failed after 12mins BUT OCCT lastet for almost 30 mins (then I had to leave). And the question is - which is more reliable? Prime or OCCT ?
 
ph no doubt im just stating that initially it looks like he needs more voltage..i didn't say put it at 1.9v cause thats not good lol
 
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