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core i7
- Thread starter ryu4000
- Start date
any voltage increase away from stock 1.2 is going to lessen the life of your CPU. Now are you going to see its life cut in half? probably not, and even then, that might be a 10 year life reduced to 5, and how many of us actually hold on to a proc that long lol. If anything worst case you might see a 1 year loss out of a 10 year life spam. So bottom line dont worry.
But in all seriousness, your processors life spam rely's probably more on heat damage, then voltage damage. As long as you keep your tempuratures to a safe medium, I dont think you even need to worry. I think up to 1.45v is safe with the proper cooling.
Just make sure your not going over 90c when running heavy multithreaded apps, and you can keep peace of mind.
But in all seriousness, your processors life spam rely's probably more on heat damage, then voltage damage. As long as you keep your tempuratures to a safe medium, I dont think you even need to worry. I think up to 1.45v is safe with the proper cooling.
Just make sure your not going over 90c when running heavy multithreaded apps, and you can keep peace of mind.
sirmonkey1985
[H]ard|DCer of the Month - July 2010
- Joined
- Sep 13, 2008
- Messages
- 22,412
i7 is 1.5v and thats directly from intel.. which brings me to the idea that maybe the c2g 45nm is actually 1.5v and not 1.4v like everyones been scared to go above.. btw increasing your voltage over stock does not lesson the life span of the cpu.. if you exceed the max spec voltage.. then you will shorten the life span.. otherwise id be shortening the life span of my cpu running it at 1.4v even though its the exact same stepping cpu as the 5000+ black edition which runs at 1.35v..
more voltage = more stress. Like having 1,000,000 cars driving on a highway daily vs 2,000,000.
wear and tear with more = less life, regardless if you believe it or not. Much like i said the question is if that time can be calculated or proven. I doubt it can, but the higher the voltage the more stress, and the less life, period. If that less life = 2 seconds, or 2 years is the question.
cant argue with the laws of physics!
wear and tear with more = less life, regardless if you believe it or not. Much like i said the question is if that time can be calculated or proven. I doubt it can, but the higher the voltage the more stress, and the less life, period. If that less life = 2 seconds, or 2 years is the question.
cant argue with the laws of physics!
Absolute max voltage specs are different for the 45nm i7 and Core 2 CPUs. They may be manufactured on the same process, but the architecture is still different.i7 is 1.5v and thats directly from intel.. which brings me to the idea that maybe the c2g 45nm is actually 1.5v and not 1.4v like everyones been scared to go above..
Dont' enderstand why people are so worried about voltage...
heat first
Run enough voltage to keep increasing the speed, you should hit a wall where it's taking too much voltage to increase the speed. The corequads were around 1.38 volts at full load after the drop.
heat first
Run enough voltage to keep increasing the speed, you should hit a wall where it's taking too much voltage to increase the speed. The corequads were around 1.38 volts at full load after the drop.
Newegg listed 1.375v as the max when I bought mine. I run at 1.288v presently.
Remember that power/heat is the square of voltage. ie, 1.40v uses 2x the power of 0.99v at the same frequency, just as an example.
Electromigration leads to failure.
Fab recipes are different for same 45nm feature size.
Remember that power/heat is the square of voltage. ie, 1.40v uses 2x the power of 0.99v at the same frequency, just as an example.
Dont' enderstand why people are so worried about voltage...
Electromigration leads to failure.
Absolute max voltage specs are different for the 45nm i7 and Core 2 CPUs. They may be manufactured on the same process, but the architecture is still different.
Fab recipes are different for same 45nm feature size.
Heat can't kill your CPU. Voltage can. CPUs have built-in thermal protection features that will throttle and then shut them off if they get too hot, but they do not have any internal mechanism to prevent from being overvolted.Dont' enderstand why people are so worried about voltage...
heat first
RyanLucier
Gawd
- Joined
- Nov 23, 2006
- Messages
- 667
http://processorfinder.intel.com/details.aspx?sSpec=SLBCH
1.375v max according to intel. That said I'd say anything up to 1.4v is just fine with appropriate cooling (<75C temperatures).
However you will reduce the life of your processor... but you're talking like 15+ year life down to 10yr... most of us won't even have these machines plugged in in 10 years...
1.375v max according to intel. That said I'd say anything up to 1.4v is just fine with appropriate cooling (<75C temperatures).
However you will reduce the life of your processor... but you're talking like 15+ year life down to 10yr... most of us won't even have these machines plugged in in 10 years...
flak-spammer
Limp Gawd
- Joined
- Aug 24, 2007
- Messages
- 262
Heat can kill a CPU, any CPU, note intel has a maximum thermal limit but running the CPU at that limit will still damage your CPU. Although I would agree that voltage has a better likelihood of doing the job.
That's the VID range, not the voltage specification. Completely different thing. The absolute maximum voltage for i7 CPUs is 1.55V.
No, it won't. Tjmax is still below the temperature that it would take to damage a CPU. The chips are designed specifically so they will not be able to reach temperatures that will cause them to fail.Heat can kill a CPU, any CPU, note intel has a maximum thermal limit but running the CPU at that limit will still damage your CPU.
flak-spammer
Limp Gawd
- Joined
- Aug 24, 2007
- Messages
- 262
I'm pretty sure Tjmax is simply a clock down function. Simply that they give a certain Tcase temp that you should run within (they make stock coolers to work in this range) and Tjmax is a protective measure. So yes it will damage your CPU but not in a way that you would or could detect obviously it will not do much if you run it that way for 30 seconds but for an extended period of time it will start to wear. Tjmax is a trigger function to protect the CPU from damage, that being said if you are running it on that line you will shorten the lifetime of the CPU by an unknown amount.
No, it isn't. Once the CPU hits the Tjmax temperature, it sends the PROCHOT signal which causes the CPU to run at full speed, and throttles the CPU down to a 6x multiplier. If the temperature continues to increase, at a level slightly higher than that the CPU will shut off to prevent damage. The Tjmax sensors are the ones on which the CPU's thermal protection features are based.I'm pretty sure Tjmax is simply a clock down function.
Tcase and Tjmax are two completely different things. The thermal spec of a CPU is the Tcase temperature that it is rated to run either at or below at stock speeds during normal operation. However, two things about this are important. The first is that Tcase is measured at the top of the heatspreader rather than inside the cores, so it will always be significantly lower than the core temperatures reported by programs like Core Temp and Real Temp (which are read from the same sensors that handle Tjmax). The second is that the thermal spec is merely the temperature that the CPU is rated to run within at stock speeds, and has nothing to do with any sort of maximum safe operating temperature. So when considering core temperatures, you cannot think about Tcase at all, since it uses an entirely different measuring system.Simply that they give a certain Tcase temp that you should run within (they make stock coolers to work in this range) and Tjmax is a protective measure.
There is no way to definitively know whether or not a CPU's lifespan will be diminished by running close to or at Tjmax for extended periods of time. However, any damage will be minimal, since the CPUs are designed to operate normally under those conditions. The simple act of actually using a CPU or putting it under load will also reduce the lifespan by a minuscule amount of time, so it's a little pointless to worry about all the little things that might have an effect on the CPU in the long run. The only thing that can really cause a significant decrease to the life of a CPU is running it with too much voltage.So yes it will damage your CPU but not in a way that you would or could detect obviously it will not do much if you run it that way for 30 seconds but for an extended period of time it will start to wear. Tjmax is a trigger function to protect the CPU from damage, that being said if you are running it on that line you will shorten the lifetime of the CPU by an unknown amount.
flak-spammer
Limp Gawd
- Joined
- Aug 24, 2007
- Messages
- 262
I think we are trying to say the same thing just using different words and they are not coming across very clearly. What I meant by clock down is exactly what you said, and I know what Tcase and Tjmax are. So I'm just going to drop this. We can agree that each person has his own opinion.