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Old 05-28-2009, 07:19 PM
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Re: [4-15] nueClockControl - underclock your touch pro/diamond

Quote:
Originally Posted by chronster View Post
OK, please correct me if I'm wrong, but underlocking the cpu can only draw less energy to a point. I mean, the difference between 19mhz and 200mhz would be the same because the device is still sending the same voltage to the cpu right? Unless the device automatically determines what the cpu needs to function correct (which I highly doubt) you'll need to tweak the voltage somehow also.

Think of it this way: I've got a cpu in a computer running at 4ghz at 1.5v. If I underclock the cpu to 2ghz, the vcore setting is still 1.5v so the same amount of energy is still being sent, just not being used, right?

As far as heat goes, it's the same. If you're pushing the limit at which a certain amount of voltage achieves a certain clock cycle, then there's going to be some resistance which causes slightly more heat than if you're simply over volting your cpu, but it doesn't matter if you're running 10mhz or 200mhz, the voltage is what's causing heat. Too much voltage causes heat, and too much resistance causes heat. Finding that sweet spot is the key.

you have to consider amperage to fully understand how electricity works. heres a brief description. the best way to describe power draw in an electrical device is with wattage (this is why battery backups are rated in watts). wattage = voltage x amperage. you are correct in assuming that underclocking would not change the voltage draw of the processor, however, what it would do is change the amperage draw, thereby ultimately lowering the total wattage draw of the device, which in turn means more battery life. as for how much of a difference it will make, that can only be determined by extensive testing, however, the theory fits.
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