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C2D Laptop - Can you overclock?

Phunky Phish

Phunky Phish

Phunky Phish

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Just got me a C2D laptop with 1.83 CPU.
a lot of these CPU's do not need extra volts to clock, so do you think I can OC my lappy safely?

Or should I just 'Leave well alone'!!!
 
Phnom_Penh said:
Leave well alone tbh.
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Agreed.

Main problem is that there are rarely options in laptop BIOS' to allow an overclock to be made...secondly if there was laptops tend to run hot at stock speeds let alone overclocked, thirdly there are lots of programs to try if you have the PLL of the chipset such as SoftFSB, ClockGEN etc but I do not recomend it.

Saying that I tried to overclock my p4 1800 - mobile laptop without success, would change with ClockGEN but not in CPU-z...its very difficult finding a program that has the correct PLL for your chipset is the main reason this is difficult......and my laptop was cheapo one I bet a c2d one costs an arm and a leg so it it really worth risking it? besides, I reckon its pretty nippy at stock :)
 
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Depends on the laptop really. If the same laptop comes with the 2.0, 2.16 and 2.33 Ghz versions of the C2D, then the cooling system is sufficient for those speeds and the same with the 1.83 Ghz C2D. So in my point of view you can give it a try if you manage to do it... it's more a problem of "how?" then "should I?"
 
I would leave it alone. A 1.83GHz Merom would provide sufficent power at stock.

Overclocking the cpu will reduce battery life anyway.
 
Phunky Phish said:
If you are not increasing volts how can it reduce battery life?
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it will draw more power [watts] when overclocked, and the fan will be running more to compensate for the added heat output

the Dothan pinmod was the best overclock method in recent times, there is no such method available to core solo/duo/core2duo, other than the top end Dell M1710 which has an option to modify the multiplier via bios on the t7600 IIRC

stick a 7xxx series cpu in it if you want more performance, thats what I did with my Precision laptop, upgraded from a t2300 to a t7400, super pi 1 meg in 23secs :)
 
As stated above. The cpu will get hotter, cooling will have to be increased drawing more power and decreasing the battery life.
 
Back to the power question!

If you do not increase the volts to the chip, it should not get that much hotter? I know its doing more work and those little transistors are flipping a lot quicker, but I thought the only reason the heat went up (substantially) was because we put more volts through them to make them work stable at the overclocked speed?

Or am I totally wrong?!

I can understand the fan drawing more power to cool CPU if its running hotter hence reduced battery performance.

PS. I decided to heed the warnings and not overclocking it!
 
Phunky Phish said:
Back to the power question!

If you do not increase the volts to the chip, it should not get that much hotter? I know its doing more work and those little transistors are flipping a lot quicker, but I thought the only reason the heat went up (substantially) was because we put more volts through them to make them work stable at the overclocked speed?

Or am I totally wrong?!

I can understand the fan drawing more power to cool CPU if its running hotter hence reduced battery performance.

PS. I decided to heed the warnings and not overclocking it!
Click to expand...

my simple understanding is it draws more power when overclocked on fsb, and hence why we need to up vcore to get them stable if we push too much

W=VA [watts = volts x amps], if voltage is a constant we will increase the amount of amps required when the chip is clocked hence drawing more watts

I'm sure a electronics bod will come along and blast my theory into the weeds or back it up shortly :)
 
you could squeeze an extra 200mhz out without problems though i would think. if its a gaming laptop it may be worth it. if not, don't bother .
 
All the electrical energy you put into it is turned into heat energy.

If the voltage is the same and it gets hotter as it is overclocked then it is obvious that the ampage it draws will be higher.

85W of heat from stock CPU. 1.4v * 60.7A
95W of heat from oc CPU. 1.4v * 67.8A

And there is the cooling.

I hope this is all right.. :)
 
Phunky Phish said:
If you are not increasing volts how can it reduce battery life?
Click to expand...

CPU power demand increases as a function of transistor switching frequency and the square of the voltage. More work is being done faster by speedier cpu so physics says power usage has to go up with frequency.

cpu power down needs are only as low as currenlty because Intel etc get a biggerer (squared) benefit re power when they reduce voltages.

most intel quoted power figures are for thermal design and are the max figures for the range not per each frequency.
 
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