• Overclocking, whats the bieffect?
    38 replies, posted
Me and a mate of me is discussing this atm, we both know overclocking results in a higher clock frequency, and also then generates more heat. But what makes it generate more heat? I always thought you increased the voltage when you overclocked, appearently I was wrong, as you could run a higher clock, but at the same time with less volt.. Can anyone explain me this? Thanks :)
Overclocking varies between processors, some overclock well without voltage increases, others BSOD when 100MHz is added without a voltage increase.
Electricity generates heat.
[QUOTE=SGTNAPALM;32414390]Electricity generates heat.[/QUOTE] Yes, I'm pretty aware of that ;) What I meant, is why does it generate more heat when its overclocked? What happens inside the cpu when you overclock it?
Well, yeah, if you go up like 600MHz it will need some more cooling. I can't tell you what happens (gman, where are you) but well, more electrical activity = more energy transferred to heat per second.
Yea. But there has to be something between higher clockfrequency and more heat.. I'd like to know the inner workings of the cpu when it gets overclocking. The reason for why its getting heated up when overclocked ;)
We'll have to wait for gman_003 or someone equally smart to show up. I am baffled as to how processors work myself.
Not sure, but I think the higher clockspeed pulls more amperage (more current going through it, because it's performing more operations/sec so it draws more) Amperage * voltage = power (watts) which creates more heat.
[QUOTE=Anderen2;32414619]Yea. But there has to be something between higher clockfrequency and more heat.. I'd like to know the inner workings of the cpu when it gets overclocking. The reason for why its getting heated up when overclocked ;)[/QUOTE]Just going out on a limb here btw. I think its because a processor can only be stable at a certain frequency at a certain voltage. When you overvolt, you allow it to stay stable at higher frequencies, but create more heat.
[QUOTE=Anderen2;32414619]Yea. But there has to be something between higher clockfrequency and more heat.. I'd like to know the inner workings of the cpu when it gets overclocking. The reason for why its getting heated up when overclocked ;)[/QUOTE] I would assume the reason that it heats up more is that it is pushing electricity through the transistors at a much faster rate than normal. Putting them through more wear, and obviously, increasing the amount of electricity going through over a certain time period.
I always thought it was when you change the voltage to keep the processor stable when you overclock it that ultimately increases the temperature.
More clock cycles= more times current changes per second. Meaning more current being used, meaning higher amounts of heat given off.
Heres a thought. Just because your cpu's voltage is set to 1.3 doesn't mean it's using all of that. Thats why you can overclock some cpus without changing the voltage parameters. When you overclock, even if the voltage is the at the same level, the higher frequency of the clock cycle draws more from the 1.3 you have it set to which in turn creates more heat.
I like how he specifically noted the fact that you can overclock without increasing voltage and then half of the replies were still "ITS BECAUSE YOU INCREASE THE VOLTAGE!!!!"
[QUOTE=DiBBs27;32415888]Heres a thought. Just because your cpu's voltage is set to 1.3 doesn't mean it's using all of that. Thats why you can overclock some cpus without changing the voltage parameters. When you overclock, even if the voltage is the at the same level, the higher frequency of the clock cycle draws more from the 1.3 you have it set to which in turn creates more heat.[/QUOTE] That isn't how electricity works, and when processors are under load the voltage actually drops down a little.
[QUOTE=demonguard;32416384]I like how he specifically noted the fact that you can overclock without increasing voltage and then half of the replies were still "ITS BECAUSE YOU INCREASE THE VOLTAGE!!!!"[/QUOTE]Well all your doing is telling the clock to run higher. Not really much to it. Its just that you need to overvolt, when the processor isn't stable at that higher speed.
[QUOTE=Anderen2;32414440]Yes, I'm pretty aware of that ;) What I meant, is why does it generate more heat when its overclocked? What happens inside the cpu when you overclock it?[/QUOTE] The way I understand it(and I could be wrong), is this: The CPU clock speed represents how many times electricity is pushed through it in a second. Therefore, a higher clock-speed results in a higher amount of times electricity runs through the CPU, generating more heat, but also allowing more work to be done in a short amount of time.
more power = more heat because more electricity is being pushed through it (friction), is it really that difficult? i love you too demonguard :)))<3
[QUOTE=Odellus;32416730]more power = more heat because more electricity is being pushed through it (friction), is it really that difficult?[/QUOTE] Agreed, the heat is caused by the resistance of the silicium semiconductor and all other components in the cpu. This happens in all electrical devices (Unless you count in superconductors at -273C)
Superconductors at absolute zero don't exist Sorry to burst your bubble bro
[QUOTE=Protocol7;32419577]Superconductors at absolute zero don't exist Sorry to burst your bubble bro[/QUOTE] since its absolutely impossible to get to absolute zero.
[QUOTE=areolop;32419608]since its absolutely impossible to get to absolute zero.[/QUOTE] can't tell if sarcastic or not I'm hoping not so I'll rate you agree
[QUOTE=Protocol7;32419889]can't tell if sarcastic or not I'm hoping not so I'll rate you agree[/QUOTE] Not sarcastic at all. It is impossible to reach absolute zero.
[QUOTE=areolop;32419897]Not sarcastic at all. It is impossible to reach absolute zero.[/QUOTE] Just making sure, your post was unclear. :v:
Transistors don't switch instantaneously. It is fast, somewhere in the 10s of picoseconds, but for each clock cycle there is a good portion of time spend switching. While switching transistors draw more current than when they are stable. As you increase the clock rate you are decreasing the time the transistor is stable and spending more time in the switching state, using more power. Higher voltages are usually used when overclocking because this increases the rate at which the transistors switch at the expense of more current and more heat.
[QUOTE=Protocol7;32419577]Superconductors at absolute zero don't exist Sorry to burst your bubble bro[/QUOTE] -273 isnt absolute 0, -273,22 is. But yes you are right superconductors range from 20 to 134K
[QUOTE=DiBBs27;32415888]Heres a thought. Just because your cpu's voltage is set to 1.3 doesn't mean it's using all of that. Thats why you can overclock some cpus without changing the voltage parameters. When you overclock, even if the voltage is the at the same level, the higher frequency of the clock cycle draws more from the 1.3 you have it set to which in turn creates more heat.[/QUOTE] Voltage is constant, amperage is not. When electrical devices draw more power (watts), the amperage goes up, not the voltage. Increasing or decreasing the voltage on a device not designed to do so will have catastrophic results. The easiest way to think about volts and amps is by using a water pipe. The voltage would be the diameter of the pipe, in this case 1.3". The Amperage would be the amount of water current flowing through the pipes. [QUOTE=Shadaez;32416574]That isn't how electricity works, and when processors are under load the voltage actually drops down a little.[/QUOTE] That's called vDroop, and it's not normal; But can't be eliminated entirely unless you want to spend some substantial coin in a massively overbuilt power regulation system. Any time you apply a load on a power source, the voltage is going to drop, but the rate at which it will drop is highly dependent on the power regulation (IE. if the power regulators (FETs in this case) on the motherboard or in the PSU are shit, then Vcc can fluctuate a bunch.) But just because Vcore drops under load doesn't mean it's drawing less power, it means the regulation system is having a hard time keeping up with demand.
How do you know how much to bump up the voltage for a stable overclock? I've never found a helpful online guide for explaining this, and I'd rather not fry my CPU.
[QUOTE=rodent-man;32425208]How do you know how much to bump up the voltage for a stable overclock? I've never found a helpful online guide for explaining this, and I'd rather not fry my CPU.[/QUOTE]Trial and error.
[QUOTE=rodent-man;32425208]How do you know how much to bump up the voltage for a stable overclock? I've never found a helpful online guide for explaining this, and I'd rather not fry my CPU.[/QUOTE] Trial and error, but with small increments. Don't try a massive increase at once, you'll probably screw it up.
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