Quick over clocking question

[AjKawalski]

So the way I understand over clocking is that the higher the voltage you apply, the higher clock you can get stable, however more voltage makes the CPU hoter. I always see videos of over clocking where they slowly work up from the base voltage while slowly increasing the clock. Why don't they just put the voltage as high as possible while still having a temp they feel comfortable with and then increase the clock to as high as stable. It seems that would be much faster but I assume I am missing something here. 

I also always see people with water cooling keeping thier temps pretty low like below 50. If with air cooling we are okay with going to say 70 why not push your CPU to 70 with water as well and get a better over clock?

Thank you!

[Franpadi]

they do it slow and steady the first time. Once they are comfortable with everything they leave it as a preset. There are other limits to overclocking, not only the temps.

[LukaH]

I overclocked the other way around i first set a clock and used voltage that i know is going to be too much (still in spec of course) and then stress test and lower the voltage until its unstable again. I think people are pushing it as far as it can go and even if you are watercooling you are still limited by the silicon lottery sometimes you just cant turn the dial up to 11. 

[WoodenMarker]

Higher voltage can degrade the cpu more quickly. Keeping voltage as low as possible is optimal.

I'm not sure why people feel the need to keep temps so low with liquid cooling. It might be beneficial if their fan control is limited and want to reserve high fan speeds near 70c.

[Moderateshadow]

you dont wanna mess with voltages more than you have too. more times than not thats what fries a cpu

[AjKawalski]

4 minutes ago, Moderateshadow said:

you dont wanna mess with voltages more than you have too. more times than not thats what fries a cpu

Does that mean you can still destroy a CPU with high voltage even if it has low temps?

[Moderateshadow]

temps and voltage go hand in hand. but yes. if you jump the voltage way too high (different depending on your chip) you can fry it. if you start getting close to that level with small increments you will start to see stability dropping. cant do that with your way

[AjKawalski]

2 minutes ago, Moderateshadow said:

temps and voltage go hand in hand. but yes. if you jump the voltage way too high (different depending on your chip) you can fry it. if you start getting close to that level with small increments you will start to see stability dropping. cant do that with your way

Alright so now I understand why you should slowly increase voltage, but why worry about stability of higher clocks until you get your voltage set? Do higher clocks increase temp too?

[Moderateshadow]

i go up in like .2 ghz steps. get it stable. than move on from there. i wont go from 3.5ghz right to 4.7

id prob go 3.7 3.9 4.1 4.3 4.5 4.7 

 

Getting it stable in between. if you cant get lower clocks stable, you wont get the higher ones stable

[Gonio]

12 minutes ago, AjKawalski said:

Do higher clocks increase temp too?

Am no pro Ocer by far, but my logical assumption would be yes, but it's then load depending I think? Some one will be correcting me if I am wrong.

The way I see it atleast is comparing it to a non OCed CPU. CPU under heavy load gets hotter when load increases. Ocing is only giving a higher headroom for your CPU = higher clockspeedlimit.

[HarryPCs]

Overclocking is simple. Add mhz to your clock speed. Run Aida64 for one hour. Add more mhz until your pc crashes. Then add voltage. Try and keep your cpu below 85 degrees Celsius and add as much mhz as you can. 

[WoodenMarker]

26 minutes ago, AjKawalski said:

Alright so now I understand why you should slowly increase voltage, but why worry about stability of higher clocks until you get your voltage set? Do higher clocks increase temp too?

Not sure what you mean.

You won't know how much voltage you need until you set the clock so that would need to be set first. 

Higher clocks do not increase temps.

[AjKawalski]

9 hours ago, WoodenMarker said:

Not sure what you mean.

You won't know how much voltage you need until you set the clock so that would need to be set first. 

Higher clocks do not increase temps.

Hello,

Lets take an extreme example and say that I am running a CPU with 1.8 Volts (probably not even possible). If I restrict the CPU clock to 1 GHz, and run it on full load, would it run at a lower temp then for example 5Ghz? Doesn't letting the CPU use more resources cause it to heat up more?

[RS2007GOD]

1 hour ago, AjKawalski said:

Hello,

Lets take an extreme example and say that I am running a CPU with 1.8 Volts (probably not even possible). If I restrict the CPU clock to 1 GHz, and run it on full load, would it run at a lower temp then for example 5Ghz? Doesn't letting the CPU use more resources cause it to heat up more?

It will stil be extremly hot as far as im aware. Try it for us and find out

[Imakuni]

2 hours ago, AjKawalski said:

Hello,

Lets take an extreme example and say that I am running a CPU with 1.8 Volts (probably not even possible). If I restrict the CPU clock to 1 GHz, and run it on full load, would it run at a lower temp then for example 5Ghz? Doesn't letting the CPU use more resources cause it to heat up more?

Order of importance for heat:

1. Load. And I'm not just talking about "100%" load, I'm also reffering to the type of load. For example: cinabench VS P95 high FFT VS Prime95 Small FFT on an FMA3 compatible CPU. This last example is very hot, middle one is just "hot" (thx RAM...) and the first one is barely any hot, even though all of them are "100%" load.
2. Voltage. The actual values and scalling depend on the architecture. Regardless, is the second most important thing that plays a role in heat generation.
3. Clocks. Does it matter? Yes, absolutely, the higher the hotter! But is it as big of a deal as the other 2 above? Not in the slightest.

[AjKawalski]

9 hours ago, Imakuni said:

Order of importance for heat:

1. Load. And I'm not just talking about "100%" load, I'm also reffering to the type of load. For example: cinabench VS P95 high FFT VS Prime95 Small FFT on an FMA3 compatible CPU. This last example is very hot, middle one is just "hot" (thx RAM...) and the first one is barely any hot, even though all of them are "100%" load.
2. Voltage. The actual values and scalling depend on the architecture. Regardless, is the second most important thing that plays a role in heat generation.
3. Clocks. Does it matter? Yes, absolutely, the higher the hotter! But is it as big of a deal as the other 2 above? Not in the slightest.

Thank you, this is exactly what I was looking for!