What Is A Safe Voltage For My CPU?

[almighty15]

Hey clunk I'm actually doing a 45nm Vcore experiment over at another forum, would you like me to link to the thread?

[mark]

would it be an idea to possibly tie in the following subject into this thread aswell "What is a safe temperature for my cpu ?" , i just thought it may tie in well together

keep rockin

[kitfit1]

would it be an idea to possibly tie in the following subject into this thread aswell "What is a safe temperature for my cpu ?" , i just thought it may tie in well together

keep rockin

Probably best kept to another thread. Because his Clunkiness was trying to answer a question that comes up 1000's of times daily all over the net, and on this forum almost on a daily basis as well.

From a personal perspective, Vcore to me dose not really matter. I have found that most cpu's, of what ever platform, will take whatever you throw at them. But as Clunk said, CPU PLL Voltage is singulary THE most important voltage that you can set. What does amaze me though, is that with the X58 platform in particular, most mobo's set it at 1.8v+, and then give you NO option to set it lower. This to me is stupid, and i'll give you an example. I have a saved clock at 201x23 for 4.6ghz, 1.4Vcore. This clock is 100% Prime, OCCT and Linx stable. But only because i run my CPU PLL Voltage at 1.2v, if i leave it at the stock voltage of 1.8v, it fails within seconds of any stress test. Now of course i'm running under phase, and it may be different for me, but at least try running your cpu pll voltage lower than your mobo sets, that is if it allows you to in the first place.

[mark]

interesting info,

so are you saying your system is stable with CPU PLL = 1.2V .... but your system becomes unstable if you have CPU PLL = 1.8V (mobo stock setting) ??

unless i have mis-read your information , why would the system become unstable with CPU PLL = 1.8V (wouldnt that mean that its slightly over volted and may produce some more heat , but not neccessarily make the system unstable ?? is there a explanation for this ??)

anyway if ive mis-read you , ill edit this post.


besides that, i just thought the "What Temperature is Safe for my CPU ?" would tie in good with "What Voltage is Safe for my CPU", because that is easily answered by "stay within Intels VID Voltage Range for your model CPU"

then i would presume, probly the second most asked question would be "what temperature is safe for my cpu ?"

just a simple recommendation, for eg. do not exceed 70C , along with do not pass Intel VID range , and bam killed 2 birds with one stone. but anyway whatever

[kitfit1]

interesting info,

so are you saying your system is stable with CPU PLL = 1.2V .... but your system becomes unstable if you have CPU PLL = 1.8V (mobo stock setting) ??

Absolutely, when at 201x23.

unless i have mis-read your information , why would the system become unstable with CPU PLL = 1.8V (wouldnt that mean that its slightly over volted and may produce some more heat , but not neccessarily make the system unstable ?? is there a explanation for this ??)

It becomes unstable because 1.8v is the Intel spec for the x58 at stock on air. I'm certainly not running on air, and obviously not running at stock either But seriously, it's difficult for me to say because i don't run the same way as most peeps. So i have to find my own settings, and have had to do that for years now. But all the way through 775's and i7's there is one thing that they share in common, and that is cpu pll voltage. And in both platforms under phase, they clock higher when the cpu pll is lower.

[stock]

I have a saved clock at 201x23 for 4.6ghz, 1.4Vcore. This clock is 100% Prime, OCCT and Linx stable. But only because i run my CPU PLL Voltage at 1.2v, if i leave it at the stock voltage of 1.8v, it fails within seconds of any stress test. Now of course i'm running under phase, and it may be different for me, but at least try running your cpu pll voltage lower than your mobo sets, that is if it allows you to in the first place.

So why on earth does the BIOS have it set at 1.8v if you can run stable at 1.2v, phase or not?

Edit: Don't worry, just read the above post

[Pastie]

So does this vary any with watercooling Kit, or would that be classed as as similar voltage to Intel's specs for air?

[kitfit1]

So does this vary any with watercooling Kit, or would that be classed as as similar voltage to Intel's specs for air?

I would think that it must do Pastie. The problem is though, from what peeps tell me, most mobo's simply don't alow you to lower the cpu pll voltage. My Classified certainly does, even lower than the 1.2v that i run. If your mobo does, then i would defo reccomend trying it if you are under water.

[Pastie]

Thanks Kit - it will only go down as low as 1.5v, but I'll give it a try

[mark]

very interesting info indeed,

so basically , are you saying that setting the CPU PLL Voltage "lower" than stock settings, in general can achieve higher overclocks ? (but the main problem is most motherboards do not allow to set the CPU PLL voltage lower then stock settings ?)

my TurboV program is reporting my CPU PLL voltage @ 1.8V , for my asus p6t deluxe v2 motherboard. i will definately try setting the CPU PLL voltage lower then this if the BIOS allows me to