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2500k max temps for " 24/7 " usage ?

post #1 of 12
Thread Starter 
I'm sure this comes up all the time but I see so many conflicting answers on what is an acceptable temp. Say I run prime and it hits 80-85c. Some people that is too high for " 24/7 " usuage. If I play games 1-2 hours a day and it hits like 70c tops is that not fine? I guess I'm confused by the 24/7 term? Other than like folding all the time in general when would you possible stress a CPU that hard for long periods of time at full load? I want see how far my CPU can go but I don't want to keep raising the voltage causing more heat to the point it could eventually damage something.
post #2 of 12
Too hot, you'll need much less voltage to keep it stable and prolong the life of the chip exponentially by getting a better cooler on there.

I recommend the H80.
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by railfan844 View Post
Too hot, you'll need much less voltage to keep it stable and prolong the life of the chip exponentially by getting a better cooler on there.

I recommend the H80.
I'm still confused by this. If my CPU will never reach that temp in real world usage other then benchmarking they how is it to high if it will literally never hit 80c playing games, video encoding or doing any normal activities with the computer.
post #4 of 12
That's fine, it's not like it's going to get that hot in everday usage. Most you might get is 75c max in everday usage. That's fine.

EDIT:

My advice on temps for sandybridge, take it as you will:

CPU throttles at 95c, some say keeping it below 85c is good, some say keeping it below 80 is better, other's say below 75c is really good and there are quite a few that say 70c should be the max. Which ever one your comfortable with and if you have substantial cooling, YOU DECIDE YOUR MAX, just remember it throttles at 95c. If for example you hit 85c in stress testing then in everday usage it shouldn't be higher than 75c which I think is fine, I personally like to keep mine below 70c in stress testing
Edited by munaim1 - 7/27/11 at 10:13am
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post #5 of 12
Quote:
Originally Posted by munaim1 View Post
That's fine, it's not like it's going to get that hot in everday usage. Most you might get is 75c max in everday usage. That's fine.

EDIT:

My advice on temps for sandybridge, take it as you will:

CPU throttles at 95c, some say keeping it below 85c is good, some say keeping it below 80 is better, other's say below 75c is really good and there are quite a few that say 70c should be the max. Which ever one your comfortable with and if you have substantial cooling, YOU DECIDE YOUR MAX, just remember it throttles at 95c. If for example you hit 85c in stress testing then in everday usage it shouldn't be higher than 75c which I think is fine, I personally like to keep mine below 70c in stress testing
I still say get a better cooler. If only just for more stability.
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post #6 of 12
I wrote up a scientific explanation of how overclocking affects CPU life here http://www.overclock.net/intel-gener...l#post14340326. Feel free to read through it to get the basics.

As for your specific case, as others have mentioned it's really what you want, and what you feel safe with. Acceptable really depends on how long you expect your CPU to last.

Remember, at stock voltages, Intel rates their CPU's to run at ~68C for 10 years, which is a LOT longer than most people use their CPU's for.

The more you go beyond stock V, and the higher the Temp gets, the shorter the lifespan, but like I said in the linked post, you'll have no issue lasting 5 years even with large amount of v, assuming you keep the temperature at or below Intel's Tcontrol point of ~68C.

If you're an enthusiast who buys a new CPU every year and has no issue pushing it to as hard and high as they can to get the max OC. These guys are fine with a high temp if it gets them a high OC.

On the other hand, you have enthusiasts who consider even temps in of 40C under load to be unacceptably high.

Then you have OEM's who don't care about temps so long as it lasts the warranty period. There was a fuss a while back about Apple responding that 90C temps under normal usage was fine for their laptops (even I would say that's pushing it).

This different definitions of "acceptable" is why you run into so many different conflicting answers.

Tl: DR - Max temp really depends on how long you want your CPU to last and what your personal definition of acceptable entails.
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post #7 of 12
Thread Starter 
Thanks for the responses. I just get a little perplexed on why people fear say an 80c prime95 when on a normal day if I don't game my cpu wouldn't even hit 50c. Also the 2500k doesn't always use all it's voltage like right now it's running under 1.0 volts because it isn't under load. I guess i'm confused on how a CPU would deteriorate if 90% of the time the CPU doesn't even hit 70c in real world usage. Do they base the deterioration estimates on full load @ say 80c all day every day?
post #8 of 12
Quote:
Originally Posted by BenN1ce View Post
Thanks for the responses. I just get a little perplexed on why people fear say an 80c prime95 when on a normal day if I don't game my cpu wouldn't even hit 50c. Also the 2500k doesn't always use all it's voltage like right now it's running under 1.0 volts because it isn't under load. I guess i'm confused on how a CPU would deteriorate if 90% of the time the CPU doesn't even hit 70c in real world usage. Do they base the deterioration estimates on full load @ say 80c all day every day?
The CPU, specifically Sandy Bridge models, deteriorate if the voltage is too high, if the BCLK is too high, or the clock speed is too high for too long. If you are getting temps of 90C and higher, and leave the computer as such temps for hours, that CPU will almost certainly deteriorate as a result of such high temps burning the silicon. If you can keep your temps under 90C, you are in good shape, although most people, mostly enthusiasts or overclockers looking for attention/bragging rights will want temps as low as possible (which they'll do by buying expensive coolers). I like my temps under 70C because I believe OCing can damage the CPU and keeping the temps as low as possible only prolongs the CPU's life. It's like buying a car with a supercharger installed, you really don't need it to get to work everyday, but it's nice to have in working order.
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post #9 of 12
Fear isn't rational.

I'm 90 minutes into Prime95 at 4.533GHz/1.344v under load and my max core temps are:

Core 1: 59C
Core 2: 64C
Core 3: 63C
Core 4: 60C

And I'm afraid that I may be using too much voltage because I lazily used the auto overclock, upped the core multiplier a couple notches and worked my way back from an offset of +0.020 to +0.005 and then set a manual 1.35v. And I keep checking nervously that Core 2 hasn't hit 65C because for some unknowable reason that seems much hotter than 64C to me.
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post #10 of 12
I personally try to keep load temps under or around 75c.
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