so i took the system as low as it would go without crashing. 2.86 volts. pleased, i uipped it to 2.9v, and played one race in extreme G. flawless. just to be safe, im going to leave it at 2.95 volts for future use.
with that done, i set out to find if undervolting the CPU would actually have an effect on power consumption. you see, gannon suggested that at a lower voltage the system would draw more current, keeping the total wattage constant (and thus, not affecting heat and battery life)
now, i could have just put my multimeter in series with the 3.3v line, measued the current it drew at a voltage, and figured out the wattage. but for some reason, the 10A function on my meter is broken
. so i had to be clever about iti cut myself a 3 inch piece of what was like 28 or 30 guage wire. i tried to measure the resistance, but it was slightly smaller than the resolution of my multimeter. i estimate it to be about .8ohms.
so then i took two test points. (looking at the menu in xG)
Code: Select all
Vo | Vr
----------------
2.96v | 22 mv
3.19v | 25 mv
(how to calculate: I = Vr/R, and the wattage is IVo = VrVo/R)
as you can see, the wattage at 2.96 volts is signifigantly lower
i should also mention that there are no vertical lines with this converter = no need for an inductor.
i am pleased.
(ps. codeman, gannon... my math ok?)
