Question about upgrading an old HP

[MetalMilitia]

Thing is I don't think RAM really uses up a noticeable amount of power:

Try this: http://www.journeysystems.com/?powercalc

[kahljorn]

certain processors are supposed to have certain memory frequencies, that's why you can overclock just by changing the memory frequency.
for example my amd xp2600 is supposed to use either 333 or 366 mhz. I used to have it at 300 and it said my computer was basically an XP2200. If I wanted to install an xp 3200 (i think that's the highest i can use) i'd have to install 400 mhz ram...

try setting the memory frequency to 100 mhz just to TEST IT... trial and error.