starting my Q6600 overclock

T

the snake

[H]ard|Gawd
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got my Q6600 batch number L745B004, VID of 1.2875, cooled with a true and a nice panaflo fan in a coolermaster 690 case with 4GB GSkill 8000 on an Abit IP-35pro

got it to 3150 on default v-core, then had to go to 1.3375 in bios for 3300.

when i set it to 1.3375 in bios it goes to 1.320 at idle in CPUz and down to 1.270 in CPUz under prime load.

is that what they call v-droop ?

my temps were CPU load 55 -50, PWM 62, room temp about 78F or 26c, i core failed small FFTs after about 25minutes, i shut the others off after 30 minutes.

do i just need to add some more v-core ?

i'm really new at overclocking these Intel deals, been on AMD for many years :)

3300.jpg
 
Instability can be a number of different elements... ram, northbridge, cpu... you can usually eliminate ram as a possible issue by relaxing timings and lowering speed, but northbridge might need a voltage bump at higher FSB speeds. Just as an example, for 3.4GHz stable (8x425) I'm at 1.4875V in bios, but it only reads 1.32V in windows under load.

I've also found at least a 5-10C increase in temp with every .1V added above 1.3V in bios.
 
I'm at 1.3750 for 3.2GHz on my E6400, and with my crappy old Zalman 9500 temps never exceed 58oC under 100% load.

Put some more juice in it and see how it runs. You should be able to pump it up to a 400 bus (400x9=3.6GHZ) with that cooler with the amount of voltage you'll need to put in it (1.4xx if I remember - go check the Core 2 OC thread and see what other people have their Q6600's at for 3.6GHz).

Intel's telling me you can get it up to 71oC and 1.5 volt - you have some more room to go!
 
Watch those PWM temps on that IP35 Pro, once you start to pump the voltage through a quad they will get very hot "90c+". This is because the heatsink does not make proper contact with them unless you do the "bolt mod".
 
I've seen the bolt mod before, basically you remove the stock heatpads, put some AS5 on, and use bolts to hold it on (pad and paste = different thickness, and plus it should hold it tighter on regardless).
 
V-droop is the difference in voltage between load and idle.

First thing I would try is loosening memory timings. My quad has a VID of 1.2625 and I run 3.2 at 1.24V. If loosening timings doesn't do anything, then I would try upping vcore. Do you have a 2x2 or 4x1 RAM setup?
 
okay which is the northbridge voltage, the MCH ?
also what are ICH, ICHIO, CPU VTT 1.2 voltage and the DDR2 referance voltage ?

do i need to mess with the others for now ?

gonna do the "bolt mod" sometime next week when i have more time. and probably palce a small fan on the chipset sinks as well.
 
okay i am here now, stable so far, how much more do you think i can go ?
i still need to do the bolt mod and maybe re-seat the heatsink, been priming for a few hours here now.
room temp of 77F-25C
3402.jpg
 
the snake said:
okay which is the northbridge voltage, the MCH ?
also what are ICH, ICHIO, CPU VTT 1.2 voltage and the DDR2 referance voltage ?

do i need to mess with the others for now ?

gonna do the "bolt mod" sometime next week when i have more time. and probably palce a small fan on the chipset sinks as well.
Click to expand...

MCH: Northbridge.
ICH: Southbridge
ICHIO: Southbridge Logic and I/O Buffer
CPU VTT: Also called vFSB, voltage running the FSB.
DDR2: I believe this is a threshold voltage supplied to RAM, should be a percentage for Abit mobos.

If everything is stable where it is, I wouldn't mess with any voltages you don't have to.
 
You can definitely take that chip higher I would shoot for 3.7 as long as your load temps don't hit 70 you should be fine don't be afraid of the V-core and the MCH but watch your PWM and use Uguru to montior those temps if they get too hot you will shut down... Also these Abit boards need Vcore more than anything else to push it start with small FFT Prime test to get processor stability then run blend to see where the rest of your voltages need to be mainly MCH and the VTT
 
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