I'm sure the OP's already taken care of his desire, and fshagan's got a different issue, but I figure this could still be useful for anyone in a similar position as the OP: older AMD-based system, running Linux, with power consumption that seems too high (though the OP never measured for sure, I expect he'd have seen similar results as I did with my similar box). Athcool
(which should be available in many standard repos -- was in Fedora 9's) would be a good thing to look into, as it can enable power saving on the chip, when it seems like it wouldn't be enabled otherwise.
After installing and enabling athcool recently on my Athlon XP 2400+ system (KM266-based motherboard, PATA DVD-RW, one PATA HDD), idle power consumption dropped from around 70W to about 32W (as shown by my UPS's display). The CPU heatsink fan was driving me nuts previously (it was something like 7 years old, so not too surprising) so I had removed it (didn't seem much in the way of replacement heatsinks for Socket A or quiet fans to swap in) and I had to run the Tri-Cools in the P182 at medium to try and avoid the CPU's going over 60C at idle. With athcool, the idle CPU temp dropped to around 45C with both Tri-Cools on low. If I put the system under heavy load I have no doubts the inside would become an oven with just that little fanless heatsink, but there's never any sort of load currently, so that's a risk I'm willing to take.
It seems like it's difficult to get consumption much lower than that with current chipsets (when I was looking at an Atom 330 setup, 30-35W seemed to be the consumption figure), so for anyone with an older AMD-based Linux setup, athcool (or any other method of enabling the CPU's power saving features) would be a free way of reducing power consumption and heat. For me, those 35W (24/7) translate to around $3/month in savings, and since I didn't spend anything on a new PSU or other hardware, I don't have a new purchase to "pay off". (But of course there's other factors that changing hardware can influence, and this method won't work for everyone.)