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Q6600 G0 overclocking questions

post #1 of 10
Thread Starter 
Hi everyone,

I'm pretty new registering on these boards, but I've been reading them for the past few months. I was wondering about a few things.

I recently bought a Q6600 with G0 stepping (I have a Gigabyte P35-DS3L motherboard). From the BIOS, I changed the CPU Voltage Control to 1.2875 volts. I also changed the CPU frequency to 300 Hz(with a 9x multiplier) to achieve 2.7 GHz. However, when I run Speedfan, Everest, or CPU-Z, all report my Core Voltage as being 1.248 volts. Which one is more accurate? Is the difference between the 2 known as "V-DROP"? When I look at peoples' sigs and they write something like "3.0 GHz q6600 1.28v", does that "1.28v" refer usually to what they set their BIOS to or what CPU-Z would state their CPU voltage to be?

Is the term "VID" the voltage the CPU "starts up" with when I first turn my computer on? When I use Core Temp, it says my VID is 1.3250 volts. (which I also noted that in my BIOS, it states my "Normal CPU VCore" is 1.3250, so I assume that's the VID too).

As it is right now, the weather being very warm in California, my CPU idle temp is (on speedfan) 31 - 33 degrees Celsius, with individual cores ranging from 36 - 42 degrees Celsius. I believe the maximum recommended temperature is around 71 degrees Celsius. That is in reference to each individual core, right? When I run prime 95 for 1 hour, the temperature max for the hottest core is around 63 degrees Celsius, does that usually indicate a problem with the fan seating, or is that normal?

My last question is what would you guys recommend to be the maximum idle temperature for a Q6600 (each individual core temperature, as I assume the overall CPU temperature is not the standard that people go by, or is it?), and what should be the max since I think that hitting 71 degrees celsius probably isn't good for the cores that do hit that temp.

Anyways, thanks for answering my somewhat self-answered questions I posted (those are there to verify if what I "know" about each of those terms is actually correct) and all the questions I asked that I don't know much about.
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post #2 of 10
Yes, the .2v drop is V-Droop. I'd personally go with the drooped voltage concern problems. thats the voltage actually hitting ur CPU. Bios has 1.248 output voltage but due to electrical resistance and what not fancy terminology stuff, about 1.225v is actually running ur CPU. thats the voltage u dont want to go past 1.5v when overclocking.
VID is usually the "stock" voltage that its ran on "stock" settings. its higher than what it needs to be for stability reasons.

idle temperature shouldn't really matter as long as your max load temp does not exceed 70C since that will send ur cpu to the grave.
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post #3 of 10
Quote:
Originally Posted by lilsquirtle View Post
idle temperature shouldn't really matter as long as your max load temp does not exceed 70C since that will send ur cpu to the grave.
I've seen B3 Q6600's run in the mid-70's 24\\7 stable (stock heatsink 2.7Ghz).

But the newer G0's are more sensitive to temps, so keeping it under 70c should be a good idea. And I was able to overclock a Q6600 to 3.0Ghz on stock voltages on a DS3L not too long ago (G0 stepping). Just upped the FSB to 333 and saved it. Perfectly stable.
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post #4 of 10
Their isn't any max idle temps, Intel specs on max core temp is 72c for G0 steppings I believe. I would try to keep load temps under 70c to be safe. Higher clocks aren't going to greatly increase your temps, only voltage increase will do that, so keep that in mind.
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post #5 of 10
Thread Starter 
Thanks for the quick and helpful replies.

lilsquirtle, when you say I shouldn't pass 70C, do you mean the CPU case (Tcase I think?) or each individual core?

lowstrike, when you got to 3.0 GHz stable on stock voltage, was that 1.325 volts manually set? or did you leave the BIOS setting on auto?

thanks for the replies, I'm trying to learn all I can :-P
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post #6 of 10
Quote:
Originally Posted by CoolBob View Post
lowstrike, when you got to 3.0 GHz stable on stock voltage, was that 1.325 volts manually set? or did you leave the BIOS setting on auto?

thanks for the replies, I'm trying to learn all I can :-P
I left the BIOS setting to auto, and just increased the FSB to 333 (I didn't do this straight, but I did it in 3 steps, like 2.6Ghz, 2.8Ghz, and 3.0Ghz).

And its low strife.
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post #7 of 10
70c on the individual core's, you most likely won't see the Tjunction temps get higher than the hottest core. I wouldn't leave the volts at auto if your overclocking.
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post #8 of 10
Quote:
Originally Posted by CoolBob View Post
Hi everyone,

I'm pretty new registering on these boards, but I've been reading them for the past few months. I was wondering about a few things.

I recently bought a Q6600 with G0 stepping (I have a Gigabyte P35-DS3L motherboard). From the BIOS, I changed the CPU Voltage Control to 1.2875 volts. I also changed the CPU frequency to 300 Hz(with a 9x multiplier) to achieve 2.7 GHz. However, when I run Speedfan, Everest, or CPU-Z, all report my Core Voltage as being 1.248 volts. Which one is more accurate? Is the difference between the 2 known as "V-DROP"? When I look at peoples' sigs and they write something like "3.0 GHz q6600 1.28v", does that "1.28v" refer usually to what they set their BIOS to or what CPU-Z would state their CPU voltage to be?

Is the term "VID" the voltage the CPU "starts up" with when I first turn my computer on? When I use Core Temp, it says my VID is 1.3250 volts. (which I also noted that in my BIOS, it states my "Normal CPU VCore" is 1.3250, so I assume that's the VID too).

As it is right now, the weather being very warm in California, my CPU idle temp is (on speedfan) 31 - 33 degrees Celsius, with individual cores ranging from 36 - 42 degrees Celsius. I believe the maximum recommended temperature is around 71 degrees Celsius. That is in reference to each individual core, right? When I run prime 95 for 1 hour, the temperature max for the hottest core is around 63 degrees Celsius, does that usually indicate a problem with the fan seating, or is that normal?

My last question is what would you guys recommend to be the maximum idle temperature for a Q6600 (each individual core temperature, as I assume the overall CPU temperature is not the standard that people go by, or is it?), and what should be the max since I think that hitting 71 degrees celsius probably isn't good for the cores that do hit that temp.

Anyways, thanks for answering my somewhat self-answered questions I posted (those are there to verify if what I "know" about each of those terms is actually correct) and all the questions I asked that I don't know much about.
Welcome to OCN

Very good questions.

1) You are correct, vdroop. There is a setting to minimize vdroop, look for loadline calibration or vdamp.
2) I state my vcore in Windows.
3) Vid, Bingo I usually ignore it, not made a difference with any of the quads I've owned(overclocking potential)
4) Max idle < 72°c , don't worry as long as loads are < 72°c on any core.


You're probably nearing you oc limit on the stock cooler, keep in mind that nothing will load your proc like Prime does.
In reality you have some headroom for everyday use.

Couple of questions for you.

Are you using the stock thermal paste, if not how much paste did you use?
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post #9 of 10
Thread Starter 
Thanks everyone for the great input. I'm learning a lot quicker by participating in these forums haha.

Grunion, I'm using the stock thermal paste. on my stock intel CPU fan. I know that head-over-heels by FAR the most recommended fan on these boards is the T.R.U.E. 120 extreme (which I can see you are using haha), but unfortunately, I think that if I buy a new CPU fan, it will probably be the OCZ Vendetta 2 since it's cheaper and I'm not going to be pushing my CPU to the maximum it can handle.
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post #10 of 10
Quote:
Originally Posted by CoolBob View Post
Thanks everyone for the great input. I'm learning a lot quicker by participating in these forums haha.

Grunion, I'm using the stock thermal paste. on my stock intel CPU fan. I know that head-over-heels by FAR the most recommended fan on these boards is the T.R.U.E. 120 extreme (which I can see you are using haha), but unfortunately, I think that if I buy a new CPU fan, it will probably be the OCZ Vendetta 2 since it's cheaper and I'm not going to be pushing my CPU to the maximum it can handle.
You could drop your temps by using some good after market TIM, like AS5.
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