Undervolted cpu by nearly 0.1v, with overclock and still stable!

[weebroonieuk]

The same main reason Intel and AMD lowered processor core-voltage as years went by - Less heat dissipation for the same workload.

Most people have opposite problem to yours, they don't understand why over-volting worked.

no they lowered the voltage as time went by because they managed to refine there manufacturing processes and shrink the die sizes so that they would save money by packing more die's per wafer of silicon

and jim with adding more volts it simply means you reached the limit of YOUR cooling not the chips capabilty

watercooler that chip or put a tec on it or even better get a vapochill then u will find its limits as it wont be done with a mere air cooled heatsink


and smaller dies meant less electricity was required to send the same signal because it had less distance to travel

then less heat was produced so they could gain higherclocks....

[Nein]

no they lowered the voltage as time went by because they managed to refine there manufacturing processes and shrink the die sizes so that they would save money by packing more die's per wafer of silicon

Die size shrink required proportional drop in voltage to avoid reaching voltage break down threshold for the process technology.

and jim with adding more volts it simply means you reached the limit of YOUR cooling not the chips capabilty

watercooler that chip or put a tec on it or even better get a vapochill then u will find its limits as it wont be done with a mere air cooled heatsink

No, depending on the designs, for some more volts simply don't work for higher clock speed.

and smaller dies meant less electricity was required to send the same signal because it had less distance to travel

then less heat was produced so they could gain higherclocks....

under-volting created less heat allowing for higher clocks, why did over-volting also worked for higher overclocking?

[weebroonieuk]

please enlighten us to why we have had to increase voltage to get higher clocks ?

i for one have a very good watercooling system and i needed to increase my voltage to the cpu and ram to have my athlon xpm operate at over 2.6 ghz from 1.8ghz ?

[weebroonieuk]

Die size shrink required proportional drop in voltage to avoid reaching voltage break down threshold for the process technology.


i find that hard to beleive , since i could quite happily run my cpu at its stock speed and increase the voltage

die size shrinks just need less voltage because it has smaller traces therefore not as much current is needed for the signal to be sent

also why do both amd and intel have higher voltages for there top end cpu's as opposed to the same die design but slower clocked counterparts ?

[Nein]

Die size shrink required proportional drop in voltage to avoid reaching voltage break down threshold for the process technology.


i find that hard to beleive , since i could quite happily run my cpu at its stock speed and increase the voltage

Don't rely upon belief, try education and intelligence instead.

die size shrinks just need less voltage because it has smaller traces therefore not as much current is needed for the signal to be sent

also why do both amd and intel have higher voltages for there top end cpu's as opposed to the same die design but slower clocked counterparts ?

Air has nominal dielectric rating of 10KV per inch, the voltage break down value is much lower for smaller air-gap distance. The same applied to any material including all typical semi-conductors.

[jimborae]

and jim with adding more volts it simply means you reached the limit of YOUR cooling not the chips capabilty

watercooler that chip or put a tec on it or even better get a vapochill then u will find its limits as it wont be done with a mere air cooled heatsink

....

I have put it on water mate, as I said I have thoroughly investigated it, the poor sausage just doesn't like too many volts flowing through it.

[Rave]

Increasing voltage can increase overclocks by increasing the signal to noise ratio, that's how it works.

[Nein]

Increasing voltage can increase overclocks by increasing the signal to noise ratio, that's how it works.

No, not at all. Increasing voltage which is increasing logic threshold level - AKA "increasing the signal to noise ratio" but it also increased the time between valid logic levels... eg, negating signal to noise advantage from the extra time taken between rail to rail voltage.

[Kumagoro]

If you push the voltage up too high then the electrons migrate where they shouldnt. its not all about heat.

[Timmy!!!]

Thats what I was on about earlier, I think its called Electron Migration.

[Nein]

"Electron Migration" is about failure and reliability, not about achieving higher clock speeds. Lower and higher "Electron Migration" rates will not make clock speed lower or higher, only how fast it would have failed.

[weebroonieuk]

"Electron Migration" is about failure and reliability, not about achieving higher clock speeds. Lower and higher "Electron Migration" rates will not make clock speed lower or higher, only how fast it would have failed.

the main content of this thread is about volts and and overclocks , how can you defy about 95% of this forum and anyone else whos into pushing there cpu's that adding voltage doesnt help ?

[Nein]

the main content of this thread is about volts and and overclocks , how can you defy about 95% of this forum and anyone else whos into pushing there cpu's that adding voltage doesnt help ?

Go ahead, answer my very first question directly to you and the rest take care of itself.

"under-volting created less heat allowing for higher clocks, why did over-volting also worked for higher overclocking? "

There're more than one reason, you can give me just one of them, it would be suffice.

[Kumagoro]

What is it exactly you are trying to say nein? its hard to know what to write when what you write is convoluted.

I wasnt talking about electron mobility either I was mentioning the increase in probability in cross transistor migration.

[Rave]

No, not at all. Increasing voltage which is increasing logic threshold level - AKA "increasing the signal to noise ratio" but it also increased the time between valid logic levels... eg, negating signal to noise advantage from the extra time taken between rail to rail voltage.

Well, an increase in switching time may be a side effect, but clearly there is an advantage to increasing the voltage, since the vast majority of CPUs with normal cooling will run faster at 1.5V than they will at 1V. If it's 'not at all' about the S/N ratio then what causes this effect?

[weebroonieuk]

Go ahead, answer my very first question directly to you and the rest take care of itself.

"under-volting created less heat allowing for higher clocks, why did over-volting also worked for higher overclocking? "

There're more than one reason, you can give me just one of them, it would be suffice.

im sorry i do appologise i thought we were discussing what we know about the cpu's and why for atleast 10 years of overclocking would almost always require an increase in voltage to make the attained clockspeed stable , not to answer your specific questions

simply because i think although your theory may be fine , in practise i have needed extra voltage on ALL my cpu's to become stable at whatever raised clockspeed not once have i found lowering actually helped me


dont u think with the amount of crazy experiments people pull on forums like this all over the internet/world have tried undervolting to help there overclocking attempts , i have, but never helped so undervolt only so i can dynamically lower my clockspeeds when i dont need the extra cycles ......

and as far as i know the voltage increases only help strengthen the signals around the cpu as it gets closer to its limits ,

do i know the scientific reasons or technical terms for this or why its required ?

nope !

do i care?

hell no !!

all i know is it works for me and just about every other person who tries it