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OC Q6600 stress testing help

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June 19, 2008 6:59:11 PM

First of all, I'm a noob at this. Just read the sticky guide and OC'd it to 3 GHz, and now I am stress testing at 1.35v with prime95. 2 Cores have failed so far in 15 mins, saying this:

FATAL ERROR: Rounding was 0.5, expected less than 0.4.

2 are still running and the temp on those is about 70 C which if I understand correctly is a bit high.
Any help on how to solve the error and how to decrease the temp a bit would be appreciated,

PS I do not know what kind of cooling I have, It's a big metal air-cooler-thing witha giant fan on the side of it if that helps.

Thanks in advance.

More about : q6600 stress testing

June 19, 2008 7:16:05 PM

Alrighty! Lets start with the usual. Down Load and run the program Core temp. It will list your VID, and you can list it here!

Then you can Down Load CPUz... Do you mean you selected 1.35000 in the Bios as your Core Voltage?

What type of equipment do you have? MoBo, RAM, Vid card, power, etc.

70c is a bit high, but not to bad while testing.

Did you do any work on the comp yourself? Maybe you should re apply thermal paste and re seat the heat sink?

Also, what settings you changed to get to 3.0 would help as well.

--Lupi
June 19, 2008 7:31:35 PM

Download Real Temp 2.6

I think you are using stock intel cooler, throw that junk away if you plan to OC at all.
Related resources
June 19, 2008 7:47:46 PM

I have Coretemp and CPUz already, VID= 1.3125
1.35 in Bios, says Core voltage: 1.304 in CPUz.

Mobo: Asus P5KC
RAM: PATRIOT PDC22G8500ELK 4*1GB
Vid card: 8800GTS 300-something mb
Power: Some built-in Antec. 500W

Here's a pic of the cooling:



Also, I now have the memory speeed set to 667 making it 1:1 to FSB apaprently(333), if that matters.

Core 0 has hit a max of 72 degrees during the 15 minute 100% load testing.

June 19, 2008 7:48:54 PM

Sorry for the big pic, cant edit it seems sorry,
June 19, 2008 7:54:46 PM

Looks dusty/bad airflow/too many wires in the way.

Re seat your HSF and apply AS-5.
June 19, 2008 7:55:47 PM

Wow, is that TRUE??? Thats the Fan holding clip of one!!! Does it have a weird cross out 4 arm thingie that you screw down to hold it in place?? Looks like an "X"??

Wow, it looks like it is!!

Awesome! Pull that thing off some time when you get the chance, and take a pic of the cleaned surface that contacts the top of your processor!

You should have waaaayyyyy low temps with that monster.

Your VID is high, just like every one else who has gotten a retail chip in the past few months.

You are gonna need more VCore to be stable.

--Lupi
June 19, 2008 8:07:39 PM

it looks like the q6600 now is all VID 1.325V i aint buying one anymore.
June 19, 2008 8:09:34 PM

Why? You can get a low VID online if your lucky.
June 19, 2008 8:10:19 PM

His is 1.3125
June 19, 2008 8:21:43 PM

This PC is "old", about a year if that matters.
Whats HSF?
I'll see if I can find some AS5 around here, no idea on how to use it though.
I got rid of most dust recently(before taking that pic).
Also, how much core voltage would yopu guys recommend(in bios)?
Thanks for the help so far
June 19, 2008 8:39:38 PM

yeah exactly!lower VID IF you are LUCKY!
June 19, 2008 8:41:09 PM

the easiest way is to up the vcore the 1.5V(NO MORE!!!) and then after you achieve your target speed then you do the minimising vcore.

or you can do the other way round which is longer.
June 19, 2008 9:07:06 PM

Okay, so increase to 1.5, to start with.
What do you mean by "achieve target speed"? Getting it stable?
June 19, 2008 9:25:08 PM

what speed the chip can go or you feel comfortable enough.
June 19, 2008 9:34:33 PM

It always help to not OC the ram and run it on it's rated speeds. This way you can pretty much assume the ram is not causing any issues.
June 19, 2008 9:53:27 PM

Im running 667 now, is that a "rated", safe speed?
June 19, 2008 10:52:49 PM

probably remount the cpu heatsink, you shouldn't be getting those temps with the TRUE, unless the fan has low cfm.
June 19, 2008 11:28:33 PM

what he mean at rated speed is the default speed.the typical speed is ddr2-800 cas 5-5-5-18@1.8V
June 20, 2008 3:23:05 AM

It's 5-5-5-9 , and I have voltage on auto for RAM. I will look at the heatsink stuff later, though I have no clue on how to do it hehe ;) 
June 20, 2008 3:33:57 AM

I just realized, op didn't mention if it was a G0 or B3 he has.
June 20, 2008 3:36:49 AM

G0 it is, whats the diff?
June 20, 2008 4:06:27 AM

ps2asker said:
G0 it is, whats the diff?

Stepping revision. G0 is better than B3. It takes less power which means less heat which means better OCing. A 3.2GHz B3Q6600 is like a 3.6GHz G0Q6600.
June 20, 2008 4:33:34 AM

with a G0 it should be able to do 3.0ghz on stock volts or one or two above stock volts.
June 20, 2008 4:39:31 AM

B3=space heater, G0="COOL"
June 20, 2008 12:58:16 PM

I've run into a bit of a problem. I removed the heatsink just to look, and then put it back on. Now I have to start my PC 10 times to get it to boot once, and that one time I get "overclocking failed" and have to "load default settings to continue". It's running fine but it's not OC'd at all.
Any ideas?
June 20, 2008 2:29:21 PM

that is weird. you only get that for wrong or unstable setting in OC.try reset the BIOS and then start again since you got a general idea what to do and a basic bottom line to start with:) 
June 20, 2008 4:00:01 PM

I just reset BIOS and OC'd with same settings as before, and its working fine again. I set vCore to 1.5V firsst but then windows didnt start so lowered to 1.45 booted fine. Running Prime95 now for 5-10 mins no errors so far, max temp is at 65 atm, not sure why its lower than before with more vcore?
Btw, what kind of test should I run? Atm Iäm ring large fft, and it says 4000 L-L iterations several times, is that correct?
June 20, 2008 4:03:04 PM

Oh, real fan says 65 and coretemp 71, sorry about that. Is 71 too high for 100% load? I mean, I wont ever actually have 100% load while doing anything right( I dont play games on this pc, just standard stuff + hd movies)?
Also, now I have DRAM at 667 Mhz and 5-5-5-9, should I change any of those settings?
June 20, 2008 4:18:29 PM

real fan?whats that?realtemp+speedfan?

what speed are you running on now?i think its best for you to take a picture of your BIOS setting and send it to me to have a look at it.
June 20, 2008 4:23:54 PM

Haha, yeah realtemp :) 
I'll take a pic, give me 5 min.
June 20, 2008 4:37:24 PM

you should turn c1E support off!
June 20, 2008 4:38:49 PM

god damm it!who told you to put 2.2v on the ram!turn it down!!!put it back at 2v!!!!
June 20, 2008 4:41:28 PM

put cpu multi to 8 from 9.then up the fsb to 400.up the NB by 1 notch then up the memoery timing to 5-5-5-18 with 2v.the rest leave it on auto.i dont want you to toucht all the referencing voltage yet.

oh up the CPU 2 more notches as well just be on the safe side.
June 20, 2008 4:42:58 PM

NB? North Bride Voltage?
June 20, 2008 4:43:22 PM

CPU what?
June 20, 2008 4:50:17 PM

yes up the north bridge 1 notch and the cpu voltage 2 notches up.
June 20, 2008 4:50:54 PM

see if those setting boots.if it does do some priming with SMALL FFTS large dont fully concentrate at the CPU.
June 20, 2008 4:59:50 PM

iluvgillgill said:
god damm it!who told you to put 2.2v on the ram!turn it down!!!put it back at 2v!!!!


The memory is rated @ 2.3v! There is nothing wrong with running DDR2 memory at 2.2v it is the highest recommended setting for regular use if it is needed. Obviously if it is not needed then lower it yet, and if the manufacturer rates it higher then it is fine to take 2.3v! 2.3v is the MAXIMUM that DDR2 should ever use, but that is only if it is rated at that high of voltage and patriot memory generally likes to play up in the higher voltage areas.

Now for 5-5-5-9 timings on 667mhz there is no need for 2.2v (in most cases), but your reaction to seeing that high may have startled the OP (since he said he was a noob lol). I just wanted to clarify that there was nothing truly wrong with that setting and that you didnt damage anything.

Best,

3Ball
June 20, 2008 5:01:34 PM

Okay, I just edited some of the stuff you said, 5-5-5-18 . 400 FSB x8, C1E off.
Had some problems as the pc failed to boot with 2V on ram, so I had to set it to 2.2V to get it to boot again. Also, I did not change CPU or NB voltage now, will do that after you reply cause I dont know what to put on NB since its on Auto now.
There are these options for NB voltage:

1.25
1.40
1.55
1.70

Which one?
And CPU from 1.45 to 1.475 right?
June 20, 2008 5:05:37 PM

ps2asker said:
Okay, I just edited some of the stuff you said, 5-5-5-18 . 400 FSB x8, C1E off.
Had some problems as the pc failed to boot with 2V on ram, so I had to set it to 2.2V to get it to boot again. Also, I did not change CPU or NB voltage now, will do that after you reply cause I dont know what to put on NB since its on Auto now.
There are these options for NB voltage:

1.25
1.40
1.55
1.70

Which one?
And CPU from 1.45 to 1.475 right?


1.40v on the NB should be fine. If it isnt then you can try for the 1.55 (last resort imo), but I wouldnt touch the 1.70v.

1.45v I would think would work on the CPU. Try it and see if it makes it through prime.

2.2v on the ram is probably a good setting for your memory at that speed, since at 1066mhz it is rated at 2.3v, so you are fine there.

Best,

3Ball
June 20, 2008 5:07:15 PM

@3ball: yeah i know.i exxagorate it abit!lol but 667 there is no need even for 2v it should do it on 1.8(stock/auto)

@OP: yeah change the cpu to 1.475v and NB well i would put it at 1.4v to start with. up those to voltage and lower the mem voltage to 1.8 or 2v?try that out?
June 20, 2008 5:07:48 PM

Okay, thanks. I got errors pretty much instantly on core 3 with Prime on 1.45 so I will go up a bit there.
June 20, 2008 5:08:38 PM

sorry i forgot you are on 800mhz now. up the voltage to 2.1v and set 5-5-5-18.:) 
June 20, 2008 5:09:14 PM

so OP can you list what setting you are on now?
June 20, 2008 5:13:22 PM

iluvgillgill said:
@3ball: yeah i know.i exxagorate it abit!lol but 667 there is no need even for 2v it should do it on 1.8(stock/auto)


Yea I knew that you did, but the OP seemed as though they maybe would not, so I just wanted to clarify.

ps2asker said:
Okay, thanks. I got errors pretty much instantly on core 3 with Prime on 1.45 so I will go up a bit there.


Remember that prime doesnt just stress the CPU. It also stresses the memory and if the memory is bad then the test will fail. Just to be sure. Leave your memory on the settings it is on now. 2.2v @ 800mhz. Take the CPU vcore to the 1.475 - 1.5v setting and the NB to 1.55 (not leaving at this) then run the test.

If it fails at this then you may want to run memtest86+ on the memory to verify that it is working correctly. Because if it isnt then none of this will work.

Best,

3Ball
June 20, 2008 5:14:07 PM

Still getting errors on core 3 with 1.475 on CPU and 1.4 on NB.
I have 5-5-5-18 2.2V atm, 400 FSB * 8. Temps are getting kinda high now 73 in coretemp and 68 in realtemp.
June 20, 2008 5:15:53 PM

If it matters(memory-wise) I had it stable at 1.45V and 333*9 earlier in Prime. Should I increase NB or both NB and CPU now?
!