Q6600 G0 @ Default = Fail - Scooby snacks for someone to help me

spluff

spluff

spluff

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Hi fellow OCukers,

My system was running stable so I decided to run Prime95 25.4 at stock to make sure the CPU was fine before I started overclocking.

The first time I run it 2 cores failed at around 1 hour. Temps seemed to get up to around 58 for 2 cores and 53 for the other 2.

I had my memory running at 12 4 4 4 at default voltage so thought this may be the cause and changed it back to the default 15 5 5 5.

2nd time I ran Prime it failed within 1 minute on 1 core.

I ran it a 3rd time and this ran for around 30 minutes with 3 different cores failing.

I thought it maybe the C1R, TM2 and EIST so I disabled them all and ran it for a 4th time.

I left this overnight and this again had failed on 3 cores 1 core after 12minutes and the other 2 cores after 1 hour.

I am really upset as I have been waiting ages to build this rig and have bought some good quality components (in sig)


One thing I noticed is that the CPU voltage in bios is 1.2625V, but in CPU-Z it was between 1.184 and 2.000V - which to me is very low!!!!!!!

I have 2 screenies:-





Please help me,
SpLuFF
 
cheers mk17 - always on the ball mate.....

In the bios I think I have the voltage set to 1.2625V.

why is the voltage so low in CPU-Z?

And the golden question - would this 1.184V in cpu-z be correct and is that why Prime is failing at stock 2.4?

Thanks for all who will help.......
 
CPU-Z often reads voltages wrongly,so I wouldn't worry too much about it,you could try downloading a later version though,I'm currently using 1.41.0(which is dated August 07)I think it's the latest version and is compatible with the newer G0 stepping.

Up your vcore as mentioned.
 
sorry i think it was a typo :$

I think it was 1.814 - which is still really low compared to 1.2625......

Would that cause problems still
 
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1.814 is your CPU voltage? If so, that's way too high. Check that again.

Right, first things first, stress test fails can be caused by all sorts of things, but in my experience it's most commonly the RAM or the Motherboard. I don't think I've ever had a faulty CPU, ever.

Download Memtest, the one you set up on a floppy or CD and you boot from it, and let it check your RAM.

Once you've done that, you can start to suspect your motherboard, but first things first, check the RAM, as that's the most common thing to go west.
 
i gues it must have been 1.184 - 1.814 would be totally wrong as you say :) and I have it written down on my paper as 1.184.

That is massively different to the default bios setting of 1.2625 isnt it?

I did do a memtest already - ran fine for 2 hours.......
 
1.184 does seem low to me. It is feasible that your board is vdrooping from 1.2625 to 1.184, but it would be unusual!

As already mentioned above, try setting your vcore manually in the bios to 1.325 or similar. Not enough voltage is just as bad as too much as far as the CPU's correct operation is concerned.
 
I would take that voltage reading from CPU-Z 1.41 with a VERY large pinch of salt. I had to go back to 1.40.5 because the readings were so far off on my system with 1.41. Was reading almost 0.5v too high!!

Also, what are all your other voltages set at in the bios? It's not always the vcore that causes instability - it could be the chipset or HTT not getting enough juice too.

Oh, btw my CPU sits at 1.188v, but that's with EIST and C1E enabled.
 
58oC at max load is a bit an the high side! Considering the thermal limit for the CPU is 65oC! I would suggest a better heatsink for the CPU! Get a Thermalright 120 Ultra Extreme, mine sits at 28oC idle, cores 2-4 and core 1 at 32oC idle! It maxes out at 41/42oC with all 4 cores loaded, mines at 3GHz at stock voltage, even with the V-drop my CPU VID is at 1.23V, Prime stable 24Hrs! What type of RAM have you got? I found mine failed Prime when I set my OCZ PC8500 to 2.3V (standard V) it was a thermal issue with the memory as it was stable at a lower voltage! (Less heat dissapation at 2.1V) I bought an Antec spot fan, which solved that little problem! I also do agree with the other guys your V-Drop is huge! Could be a dodgy CPU! Or your mobo, also what type of PSU do you own, that could also be key! Make sure your BIOS version is up to date!
Jonnygrunge
 
My chipset, memory, CPU and HTT are all running default voltages.

I thought running my CPU at defaut (2.4) I wouldnt need to change any voltages to get it running stably :/

If my bios is set to be running at 1.2625V (default) and CPU-Z is showing between 1.184 -> 1.200 (flicks between these 2 values) what is the correct cpu voltage :D

I really do hope its just a matter of increasing the voltage of my cpu as I am getting vdrooooooop........ ( I am using 1.41 cpu-z)

Jonny - my specs are in my sig :) and the noctua nh-u12f is supposed to be very close to the Thermalright Ultra extreme
 
If it is a G0 my default voltage is 1.2875V try setting the voltage to that! I set mine to Normal in the BIOS!
Goto Gigabytes website and download @BIOS it is a utility that will update your BIOS automatically and flash it in windows so there is less of a risk of completely bricking your system! Try that version F2 is very old my DS4 is at F7! There will probably be an update for Quad processors!
 
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Jonnygrunge said:
If it is a G0 my default voltage is 1.2875V try setting the voltage to that!
Click to expand...

will give that a go jonny......

Im open to all suggestions :) the more the merrier for when I get home tonight to try out.............

This is my first Intel for years - been with AMD for a while....... so maybe I cannot rely on default P35C-DS3R settings for a stock cpu at 2.4ghz.....

The bottom line is that my CPU wont Prime at stock voltage and stock frequency (2.4) even though in my bios it is set to 1.2625 (stock). But cpu-z is showing it at 1.184 to 1.200V.

I wanted to make sure my system was stable at stock before overclocking it......
 
Jonnygrunge said:
58oC at max load is a bit an the high side! Considering the thermal limit for the CPU is 65oC! I would suggest a better heatsink for the CPU! Get a Thermalright 120 Ultra Extreme, mine sits at 28oC idle, cores 2-4 and core 1 at 32oC idle! It maxes out at 41/42oC with all 4 cores loaded, mines at 3GHz at stock voltage, even with the V-drop my CPU VID is at 1.23V, Prime stable 24Hrs! What type of RAM have you got? I found mine failed Prime when I set my OCZ PC8500 to 2.3V (standard V) it was a thermal issue with the memory as it was stable at a lower voltage! (Less heat dissapation at 2.1V) I bought an Antec spot fan, which solved that little problem! I also do agree with the other guys your V-Drop is huge! Could be a dodgy CPU! Or your mobo, also what type of PSU do you own, that could also be key! Make sure your BIOS version is up to date!
Jonnygrunge
Click to expand...
the thermal limit before it starts throttling is 85 or even 100, and the max "safe temp" is around 70.
 
58c at max load sounds reasonable for a quad on air but it doesn't leave much headroom for an overclock and increased vcore,many of these quads seem to have imperfect IHS's.

Lapping will void your warranty but will improve temps enormously,especially if you've got a particuarly convcave one.
 
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