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The Truth about Temperatures and Voltages - Page 31

post #301 of 599
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Quote:
Originally Posted by aznofazns View Post
LLC does eliminate vdroop, but it still doesn't solve the problem of my voltages dropping after Sleep/Hibernate.
Have you disabled C1E and Speedstep?
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post #302 of 599
C1E is disabled. I don't see an option for Speedstep in my BIOS. Is there another name for it?

Also, I just tried enabling LCC again to see what would happen. After a fresh reboot, idle voltage is 1.504v (1.52v in BIOS) and load is 1.52v, which seems correct based on what LLC does. Then, after I resume from Sleep, idle voltage becomes 1.480v, but get this: under Prime95 Small FFTs, voltage droops to an amazing 1.39v. That's almost .1v of vdroop... Prime95 failed immediately.
Edited by aznofazns - 10/30/09 at 12:39pm
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post #303 of 599
Thread Starter 
Quote:
Originally Posted by aznofazns View Post
C1E is disabled. I don't see an option for Speedstep in my BIOS. Is there another name for it?

Also, I just tried enabling LCC again to see what would happen. After a fresh reboot, idle voltage is 1.504v (1.52v in BIOS) and load is 1.52v, which seems correct based on what LLC does. Then, after I resume from Sleep, idle voltage becomes 1.480v, but get this: under Prime95 Small FFTs, voltage droops to an amazing 1.39v. That's almost .1v of vdroop... Prime95 failed immediately.
Ussually it's marked as "Intel Speedstep"

Your load voltage shouldn't be dipping much at all, hence the function of LLC. So if I am reading this correctly, if you do a fresh boot your idle voltage is 1.504v and if you turn on prime95 it is 1.52v load, but if you let it go to sleep when you wake it back up idle has now dipped to 1.480v. Then if you load it up in prime95 it droops down to 1.39v?
Edited by ChickenInferno - 10/30/09 at 12:43pm
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post #304 of 599
Quote:
Originally Posted by ChickenInferno View Post
Ussually it's marked as "Intel Speedstep"

Your load voltage shouldn't be dipping much at all, hence the function of LLC. So if I am reading this correctly, if you do a fresh boot your idle voltage is 1.504v and if you turn on prime95 it is 1.52v load, but if you let it go to sleep when you wake it back up idle has now dipped to 1.480v. Then if you load it up in prime95 it droops down to 1.39v?
That's correct. I was just now looking at the CPU settings in my BIOS and found that Speedstep disappears when my Multi is locked at a certain value (mine was at 8x). Once I set it to AUTO, then i can disable Speedstep... So with it disabled, and LLC enabled, I'm going to see what happens.
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post #305 of 599
It can also be called "CPU EIST Function".
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post #306 of 599
Thread Starter 
Quote:
Originally Posted by aznofazns View Post
That's correct. I was just now looking at the CPU settings in my BIOS and found that Speedstep disappears when my Multi is locked at a certain value (mine was at 8x). Once I set it to AUTO, then i can disable Speedstep... So with it disabled, and LLC enabled, I'm going to see what happens.
Your vcore should absolutely not be behaving like that. It sounds like a motherboard issue and IIRC Asus will RMA a motherboard for doing that.
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post #307 of 599
Quote:
Originally Posted by aznofazns View Post
ChickenInferno, I really appreciate you taking the time to explain CPU temps. That was really a great read. I would just like to know, based on your experience/opinion, what is the maximum safe core temp for a G0 Q6600 under 100% load, assuming it's 100% stable?
As long as it's 100% stable, it's safe. But at the same time, Intel says the 65nm Core2 CPUs have a maximum voltage of 1.55 while it's 1.45V for the 45nm Core2s. So, as long as your full-load voltage is 1.55V or less, and as long as rigorous and "extreme" stress testing have proven it to be stable, then it's proof/evidence that the temperatures are fine.

So, assuming it's 100% stable, you can also assume the temperatures are fine due to the fact that it's 100% stable.

I know I was redundant, but I thought it was necessary. hehe
Quote:
Originally Posted by FSF-Foxhound View Post
As from what you said, and what I think, this appears to not mean 1.36 vcore (maximum stock VID for some chips). This could mean 1.21 isn't "within operating limits" if your CPU isn't stable, no?
The VID isn't the maximum voltage. It's just the voltage that the CPU would request from the motherboard if the voltage were set to Auto. But the maximum safe full-load voltage according to Intel is 1.45V for their 45nm Core2s, and 1.55v for their 65nm Core2s.

But to be 100% sure that your CPU is experiencing the LEAST amount of degradation possible while overclocked, you need to make sure that it's rock-solid stable. It should be so stable that you could almost use it as a server!
Quote:
Originally Posted by FSF-Foxhound View Post
what does the beer emoticon have to do with extremely evil? haha
It's actually cola (like Coke or Pepsi), not beer.
Quote:
Originally Posted by aznofazns View Post
LLC does eliminate vdroop, but it still doesn't solve the problem of my voltages dropping after Sleep/Hibernate.
According to what AnandTech has found, using LLC is a very bad idea, especially at higher voltages.

Please see the following part of my signature: vDroop: Do not tamper with it. Source #2: Page 5, Page 6. The voltage spikes your CPU experiences without vDroop (or with vDroop reduced) are going to cause degradation faster than an unstable overclock.
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post #308 of 599
UPDATE:

Crap. With BIOS vcore set to 1.50v, LLC on, C1E and Speedstep off, I get 1.472v idle and 1.488v load. After Sleep resume, I get 1.440v idle and INSTANT CRASH under Prime load. I'm assuming it crashes because vdroop kicks in and bring the voltage down below 1.400v, DESPITE LLC being enabled. This is getting really worrisome.
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post #309 of 599
Quote:
Originally Posted by aznofazns View Post
UPDATE:

Crap. With BIOS vcore set to 1.50v, LLC on, C1E and Speedstep off, I get 1.472v idle and 1.488v load. After Sleep resume, I get 1.440v idle and INSTANT CRASH under Prime load. I'm assuming it crashes because vdroop kicks in and bring the voltage down below 1.400v, DESPITE LLC being enabled. This is getting really worrisome.
This is potentially another reason to avoid using LLC with higher voltages like this.
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It's a computer!
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post #310 of 599
Quote:
Originally Posted by TwoCables View Post

The VID isn't the maximum voltage. It's just the voltage that the CPU would request from the motherboard if the voltage were set to Auto. But the maximum safe full-load voltage according to Intel is 1.45V for their 45nm Core2s, and 1.55v for their 65nm Core2s.


It's actually cola (like Coke or Pepsi), not beer.


@1
I was saying 1.36 is usually the maximum stock VID, not the maximum voltage.

@2 oh really? dang. :C
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