Help Overclocking Q6700 - GA EP45 DS3P

craigy72

craigy72

craigy72

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Joined
26 Jan 2009
Posts
78
Hello All,

As the Title says, I want to start to overclock my CPU. My system is:

Intel Core 2 Quad Q6700 LGA775 "Kentsfield" 2.66GHz (1066FSB) - OEM
Gigabyte GA-EP45-DS3P Intel P45 (Socket 775) PCI-Express DDR2 Motherboard
OCZ Gold Edition 4GB (2x2GB) DDR2 PC2-8500C5 Dual Channel
Arctic Cooling Freezer 7 Pro CPU Cooler

Currently I have the Multiplier at stock 10x and the FSB at 305 giving me a total of 3049.99 mhz.

Anything higher than 305 turns the system unstable and during a prime95 stress test the system reboots.

This leads me to believe I need to increase my voltage. Which is currently at stock - 1.2375v

I have NEVER played around with any voltage settings before so would appreciate some guidance as to how to this. From my understanding it is a case of slightly incrementing the voltage beyond 1.2375, then upping the FSB to 310 and continuing the process.

I have noticed from looking at other overclockers setting that they sometimes reduce the multiplyer and increase the FSB dramtically, why is this, does this offer more stability?

Im currently using CoreTemp 0.99 and SpeedFan 4.40 to measure the temperatures of the Cores. However, I have noticed that CoreTemp is ALWAYS 10 degress higher than SpeedFan - which is the correct temperature?

My temps are currently (Using coreTemp - temperatures are 10 degrees lower in SpeedFan)
(IDLE)
Core 0: 43
Core 1: 43
Core 2: 37
Core 3: 37

(LOAD - Prime95)
Core 0: 61
Core 1: 60
Core 2: 56
Core 3: 55

Could you also recommend what the operating temp should be for this chip and whether or not I have much room for more overclocking?

Thanks,

Craig
 
You don't have much headroom with the load temps you have. Anything over 60c most will find uncomfortable. You are correct in saying you need to increase the vcore as your stock vcore is very low. Try upping it to 1.35 and see how far you can increase the FSB, perhaps to 360 which will give you an overclock of 3.6ghz.

Keep an eye on those load temps though and do not go over 70c.
 
Thanks for the reply.

So I decided to take it slow and pump up the FSB to 320 and the Voltage to 1.3000.

This caused the system to be unstable.

Should I keep upping the voltage until it becomes stable - say 1.32 next time? One thing to note is that currently the motherboard ram settings are set to 'Extreme' - could this cause the system to become unstable?

I have read that can cause problems although the system is stable setting the Ram to Extreme and overlocking to 305 x 10.

Thanks,
Craig
 
Can u not lock the FSB for the ram but still change the FSB of the CPU I am sure my Asus striker extrem allows this though I have not yet attempted to OC my Q6700.

Just spotted date of thread sorry to drag it up.
 
Speedfan's temp reading on CPU tends to be less accurate I think, as Core Temp and HW Monitor both report the same temp to me and is always higher than speedfan's.

I need 1.48v to keep my Q6600 G0 prime stable at 3.6GHz by the way (even with 1.47v my 4th core would stop working in prime), but I got good airflow for my case and a very good CPU cooler, so my temp is only maxed at 62~65C even in prime.

Your AC7 should be able to keep the Q6700 at under 70C even if you pump more vcore...just don't go beyond 1.4v for now I would say.
 
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